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Publication numberUS2634961 A
Publication typeGrant
Publication date14 Apr 1953
Filing date24 Jun 1947
Priority date7 Jan 1946
Publication numberUS 2634961 A, US 2634961A, US-A-2634961, US2634961 A, US2634961A
InventorsFredrik Ljungstrom
Original AssigneeSvensk Skifferolje Aktiebolage
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method of electrothermal production of shale oil
US 2634961 A
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Description  (OCR text may contain errors)

Patented Apr. 14, 1953 METHOD OF ELECTROTHERMAL PRODUC- TION OF SHALE OIL Fredrik Ljungstrom, Fiskebackskil, Sweden, as-

signor to- Svenska Skilferolje Aktiebolaget, Orebro, Sweden, a corporation of Sweden Application June '24, 1947,, Serial No. 756,625 I I.

In Sweden January 7, 1946 Section 1, Public Law 690, August 8, 1946 a Patent expires January 7, 1966 g 1 In my copending application Ser.,No. 756,624, of even date I suggest to heat shale rocks in their ,natural condition by means of electrical heating elements thrust into channels bored in the rocks so as to cause pyrolysis therein. The oil gasesand other gases thus produced are drawn off through special exhaust passages in the rocks to be collected and recovered through condensation and other processes.

-It isone of the objects of this invention to carrythis heating process into effect, in a manner such that the energy required for the same is :obtained at a lower cost than hitherto, in order-thus to out down the cost of producing the oil. Another object is to provide a heating process, wherein the shale rocks serve, so to speak, as, an,accumulator for cheap electric energy, which is consequently recovered in the form of heat, to be utilized for the benefit'of a pyrolysis carried into effect on a later occasion. A further object is to bring about a preparatory treatment of the shale rocks, so that leakage of the products recovered in the pyrolysis is effectively prevented. Further objects and advantages of the invention will be apparent from the following description considered in connection with the accompanying drawing, which forms a part of this specification, and of which:

Fig. l is a vertical sectional view of a shale rock, and

; Figs. 2 and 3 represent two diagrams.

In the drawing, I designates an oleous shale layer, which may have a layer of limestone rock 12 and an earth layer I4 superimposed on the same. ,Thrust into vertically bored channels are a great number of electrical heating elements It adapted to heat the shale layer [0. My above mentioned patent application is referred. to for a closer description of the construction and arrangement of said heating elements andv of the exhaust passages. The heating elements It are connected to an electric power system 20 by means of branch conduits l8, so that low-voltage current is supplied to the heating elements. As

will also appear from said application, the heating. Oijthe shale rock is carried into effect in such manner that a horizontally travelling heat front is created, the direction of-which is denoted y 22 in Fig. 1.

In accordance with the invention, the heating of the shale rock is divided into two stages, a preheating stage and a subsequent stage for heating to the ultimate temperature, the latter beingcalled the pyrolysis heating in the following, In the heatingoi the shale, an oil produc 7 Claims. (Cl. 2623) 2 ing pyrolysis occurs at a temperature exceeding 250 0., and only in the proximity of 300 C. will there be anything like an appreciable production of oil gases and other hydrocarbon gases. The liveliest pyrolysis proceeds between 300 C. and 400 C., for example, that is to say, substantially all of the oil and gas quantities produced during the electro-thermal oil production isextracted within the said range. In the embodiment illustrated in the drawing, the preheating is carried out within a range of the shale rock confined between the dash and dot lines 24, 26, the heating elements located within this region being connected to the electrical power line 20. The temperature is thus caused to increase gradually by successively connecting further rows of heating elements [6 into the circuit, the rise of the temperature taking place according to the curve 30 in Fig. 2, the abscissa of which indicates the hori-. zontal extent of the shale field according to Fig. 1 in the direction of the heat front, whereas the ordinate of said curve indicates the tempera-v ture in the shale rock. During the preheating process, the shale rock is heated to a temperature corresponding to the line 32 in Fig. 2, where no appreciable pyrolysis has set in as yet, said temperature amounting for instance to 240.-280 C. The pyrolysis heating is carried into efiect within a portion of the rock limited by the lines 34, 36, which portion is separated from the pre-. heating portion. During the pyrolysis heating, the temperature of the rock is increased in steps according to the curve 38 to'the final temperature according to line 40, which temperature may amount to 360-420 C. Upon the lapse of a certain time, the preheating may have reached the curve 30 and the pyrolysis heating the curve 38 Thus there are two separate heating zones in the shale rock which progress forwardly in the same direction.

During the preheating period, approximately two-thirds of the requisite quantity of heat is supplied to the shale rock, while only about a third thereof is supplied during the pyrolysis heating, in the example presented above. While the preheating may be periodical, the pyrolysis heating takes place as continuously as possible, which has an advantageous effect on the produc-, tlon. As an example it may be assumed that. the. preheating only takes place during the half of the year. It is assumed that the same quantity of energy is always supplied to a heating element per unit of time. Inasmuch as two-thirds of the total quantity of heat is supplied during the preheating, obviously four times as many heating elements will have to be connected into the circuit as during the pyrolysis heating, which involves that double the quantity of heat is supplied inrhalf of the time. The travel rate of the preheating front confined by the lines 24, 26 will at the same time be double the rate of progress of the pyrolysis front between the lines 34, 36.

It is readily understood that there will be a portion of the shale rock of varying length between the two heating fronts. This portion has reached the temperature level according to the line 32, that is to say, it has been brought up to the temperature at which the pyrolysis may be commenced. When the preheating is interrupted, the distance between the lines 26 and 34 is reduced; again, when the preheating is started, said distance is increased.

This interruption in the heat supply to the shale rock, on its having reached the temperature level 32, entails a number of very considerable advantages. While heat is supplied to a heating element It, the shale rock about the same is brought to varying temperatures, inasmuch as the temperature falls in a direction from the element, according to the curve 42 in Fig. 3. In this figure, the abscissa corresponding to the curve. 42 is designated by it. After the electrical energy has been disconnected, the temperature will be equalized according to the curve 48. 9n account of the interval between the two heating periods, the shale rock will consequently show a more completed equalization of the temperature within, the heated portion of the rock. A shale rock has a coefiicicnt of heat expansion of about 0.00001. At the distances of 2-3 meters accurring between the various heating elements I, the expansions of different portions created by the heating will thus vary considerably within the shale rock at the diiierences in temperatureappearing from the curve 42 in Fig. 3 (such as 200 0.), very irregular heat strains being thus produced within said portions of the rock. Gen erally, however, there is a tendency toward a swelling efiect by the heat in the horizontal direction created by the general heating of the rock. This swelling effectv tends to compress all vertical fissures occurring within the shale rock and, consequently, has a tightening effect on these fissures. However, during the preheating period partial zones are formed within the roclr, which tend to compress the above-mentioned fissures, whereas other zones are also formed where such compression is prevented. In the equalization of the temperature during the interval between the two heating periods, the compression of any fissures occurring becomes more general and thus more eiiective. The effect of the gases produced in the pyrolysis heating following non-desirable paths is thus counter-- acted to a very great extent by interruptions in the'hea't supply. Furthermore, the invention involves advantages as to the economical ultimate result in the electro-thermal recovery of oil. The preheating may be advantageously carried intoeifect during such times where cheap hydraulic power is comparatively amply available. The invention thus offers a favourable alternative fur the electric steam boilers in which, as is well known, electrical energy is used for the genera tion of steam The pyrolysis heating is carried into efiect at a relatively uniform supply of electrical energy. Preferably, the heat supply required for this purpose may constitute a small portion of the whole of the supplied quantity of heat as per above.

4 In electro-thermal production of shale oil, oilforming gases are extracted in part, which are recovered in a liquid state by condensation, while in part also other gaseous hydrocarbons and hydrogen, are formed, which can be condensed only with great difficulty at low temperatures, and which for this reason are called non-condensable gases hereinafter. Generally, these gases constitute the half of the quantity of all recovered hydrocarbons, and they have approximately the same effective combustion value as that of the liquid hydrocarbons. Thus for every liter of oil produced, approximately 1 cubic meter of gas is obtained at the same time. This gas is an excellent fuel, and when used in the proper manner it has a great commercial value equivalent to that of the oil, but with respect to the facilities of distribution and sales, it is not as manageable as the oil. A comprehensive network of gas conduits and great erection costs will thus accompany the distribution of the gas, and if all of the gas were to be distributed from a place where, say, 200,000 cubic meters of oil are produced yearly, considerable difiiculties are met with. If, for instance, constituents (sulphur and so forth) of the gas can not advantageouslybe recovered at the shale field, the same are instead preferably used as fuel in a central power station for the generation of electrical energy,

which is applied, according to the invention, if desired alternatively with other energy supplied, for instance from water power, for the pyrolysis heatingof the shale rock. On the other hand, a uniformly or nearly uniformly proceeding pyrolysis heating throughthe supply of electrical energy may be arranged from the gas-fired power station. By suitably determining the temperature to which the rock is heated during the preheating period the pyrolysis heating may thus be carried into effect without any external supply of energy in the form of hydraulic power.

The pyrolysis heating proceeds in such casecontinuously independently of the preheating,

which may be periodical and adapted, for instance, to excess power available from the hydraulic power stations. Obviously, the steam station is in this way loaded continuously and, if desired, uniformly, and, something of particular importance, the pyrolysis proceeds in a uni- 1 form and undisturbed process independently of the prevailing conditions relative tothe water power. However, the pyrolysis heating may be carried on at varying intensity during different periods and seasons, by a varying number of heating elements beingconnected into the network at the same time.

In a country, for instance of the size and nature conditions of Sweden, the invention under all circumstances renders possible an economically advantageous use of excess energy or so-called secondarypower from the hydraulic power stations for the production of liquid fuel. By the preheating, the shale rock here constitutes an accumulator recovering hydraulic energy in the form of heat, which may then, if desired, be -utii i-zed for the ultimate recovery of oil at a far later time.

According to the invention, the steam power station may be fired either solely with gas from the pyrolysis process, or, the same may be fired with other fuelsdepending on the prevailing conditions on every particular occasion. Thus the gas may be readily disposed of during certain periods, for instance for the supply of gas to the cities in winter-time. In summer-time, when winter-time.

such gas consumption is less, the steam station may be fired solely with the gas or with a suitable combination of gas and other fuels. According to the invention, the non-condensable gas can thus also be utilized in a particularly favourable manner by the combination of a periodically heated shale-rock, on the one hand, where the preheating proceeds, and which accumulates and utilizes available cheap waterfall energy, and, on the other hand, pyrolysis heating effected solely with the non-condensable gas produced by the pyrolysis, this use of the gas also taking place periodically alternately with the employment of the gas for other purposes. In this case too, it is conceivable to vary the intensity of the pyrolysis heating by altering the number of active heating elements [6 to suit the oil or gas quantity produced per unit of time and the consumption of electrical energy to the price conditions. Generally, a periodic operation of the preheating may be carried into effect synchronously with the seasons. In summer, for example, there is as a rule an excess of electrical energy available, while in this season the gas consumption, for instance, in the cities is at the same time reduced often to less than the half of the quantity required in Through the preheating energy accumulated during the summer, the steam power stations may therefore, according to the invention, aid in winter toward the electrical energy supply by firing with fuels other than the gas, while the pyrolysis gas produced in the same time is used simultaneously in the gas distribution of the cities, where it is of a higher value than in the form of boiler fuel. According to the invention, the production, for instance, of

raw shale oil is rendered possible by electrothermal means out of shales, even of relatively poor in oil, at so good an economy that this oil can compete with oils, as far as cost is concerned.

The gas-fired power station may be provided with steam turbines or gas turbines or other modern heatpower motors.

While one more or less specific embodiment of the invention has been shown, it is to be understood that this is for purpose of illustration only, and the invention is not to be limited thereby, but its scope is to be determined by the appended claims.

What I claim is:

1. The method of recovering hydrocarbons from shale deposits in situ by electro-thermal pyrolysis which includes the steps of supplying electric energy to two horizontally spaced areas of a given deposit to provide a first zone heated to a preheat temperature lower than the final temperature at which recovery of hydrocarbons is effected and a second zone heated to pyrolysis temperature to effect the desired recovery of hy- 6 drocarbons, the electrical energy being supplied progressively to the different areas to cause the heat fronts of the two zones to travel horizontally in the same general direction.

2. The method as set forth in claim 1 in which the electrical energy is supplied differently with respect to time intervals to provide a varying horizontal distance between the said zones at different times.

3. The method as set forth in claim 1 in which a given area is first heated to preheat tempera-.- ture to accumulate heat therein at a temperature below that at which pyrolysis occurs and subsequently heated at a later time to pyrolysis temperature.

4. The method of recovering hydrocarbons from shale deposits in situ by the aid of a plurality of horizontally spaced heating elements located in a shale deposit which includes the steps of initially preheating a selected area to a preheat temperature lower than the temperature at which pyrolysis occurs to accumulate heat therein at a temperature below that at which pyrolysis occurs and subsequently heating the same area to pyrolysis temperature to effect recovery of the hydrocarbons in gaseous form.

5. Method as set forth in claim 4 in which the preheating is effected by supplying electrical energy to said heating elements intermittently and in which electrical energy is supplied to said elements for pyrolysis heating only after an appreciable time interval following the completion of the preheating whereby to permit substantial temperature equalization over the area preheated before pyrolysis heating is effected.

6. The process of recovering hydrocarbons comprising slowly preheating an extensive area containing shale and hydrocarbon by applying heat at a plurality of spaced locations in the area to a temperature below the temperature at which pyrolysis occurs to accumulate heat therein at a temperature below that at which pyrolysis occurs, subsequently progressively heating the same area to a temperature at which pyrolysis occurs and collecting the hydrocarbon products.

'7. The process according to claim 6 wherein the direction of treatment of the area by the preheating and the subsequent heating progress in the same general direction.

FREDRIK LJUNGSTROM.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 849,524 Baker Apr. 9, 1907 1,422,204 Hoover July 11, 1922 1,457,479 Wolcott June 5, 1923 1,510,655 Clark Oct. '7, 1924

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US849524 *23 Jun 19029 Apr 1907Delos R BakerProcess of extracting and recovering the volatilizable contents of sedimentary mineral strata.
US1422204 *19 Dec 191911 Jul 1922Brown Thomas EMethod for working oil shales
US1457479 *12 Jan 19205 Jun 1923Wolcott Edson RMethod of increasing the yield of oil wells
US1510655 *21 Nov 19227 Oct 1924Cornelius ClarkProcess of subterranean distillation of volatile mineral substances
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US2780450 *20 May 19525 Feb 1957Svenska Skifferolje AktiebolagMethod of recovering oil and gases from non-consolidated bituminous geological formations by a heating treatment in situ
US2789805 *26 May 195323 Apr 1957Svenska Skifferolje AktiebolagDevice for recovering fuel from subterraneous fuel-carrying deposits by heating in their natural location using a chain heat transfer member
US2914309 *25 May 195324 Nov 1959Svenska Skifferolje AktiebolagOil and gas recovery from tar sands
US2923535 *11 Feb 19552 Feb 1960Husky Oil CompanySitu recovery from carbonaceous deposits
US3137347 *9 May 196016 Jun 1964Phillips Petroleum CoIn situ electrolinking of oil shale
US3149672 *4 May 196222 Sep 1964Jersey Prod Res CoMethod and apparatus for electrical heating of oil-bearing formations
US3848671 *24 Oct 197319 Nov 1974Atlantic Richfield CoMethod of producing bitumen from a subterranean tar sand formation
US3954140 *13 Aug 19754 May 1976Hendrick Robert PRecovery of hydrocarbons by in situ thermal extraction
US3989107 *10 Mar 19752 Nov 1976Fisher Sidney TInduction heating of underground hydrocarbon deposits
US4043393 *29 Jul 197623 Aug 1977Fisher Sidney TExtraction from underground coal deposits
US4116273 *29 Jul 197626 Sep 1978Fisher Sidney TInduction heating of coal in situ
US4640352 *24 Sep 19853 Feb 1987Shell Oil CompanyIn-situ steam drive oil recovery process
US4886118 *17 Feb 198812 Dec 1989Shell Oil CompanyPyrolysis; enhanced oil recovery
US5065819 *9 Mar 199019 Nov 1991Kai TechnologiesElectromagnetic apparatus and method for in situ heating and recovery of organic and inorganic materials
US5255742 *12 Jun 199226 Oct 1993Shell Oil CompanyHeat injection process
US5297626 *12 Jun 199229 Mar 1994Shell Oil CompanyOil recovery process
US5829519 *10 Mar 19973 Nov 1998Enhanced Energy, Inc.Subterranean antenna cooling system
US5829528 *31 Mar 19973 Nov 1998Enhanced Energy, Inc.Ignition suppression system for down hole antennas
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US706625724 Oct 200227 Jun 2006Shell Oil CompanyIn situ recovery from lean and rich zones in a hydrocarbon containing formation
US707357824 Oct 200311 Jul 2006Shell Oil CompanyStaged and/or patterned heating during in situ thermal processing of a hydrocarbon containing formation
US7077198 *24 Oct 200218 Jul 2006Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation using barriers
US707719924 Oct 200218 Jul 2006Shell Oil CompanyIn situ thermal processing of an oil reservoir formation
US708646524 Oct 20028 Aug 2006Shell Oil CompanyIn situ production of a blending agent from a hydrocarbon containing formation
US708646824 Apr 20018 Aug 2006Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using heat sources positioned within open wellbores
US709001324 Oct 200215 Aug 2006Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce heated fluids
US709694124 Apr 200129 Aug 2006Shell Oil CompanyIn situ thermal processing of a coal formation with heat sources located at an edge of a coal layer
US709694224 Apr 200229 Aug 2006Shell Oil CompanyIn situ thermal processing of a relatively permeable formation while controlling pressure
US709695324 Apr 200129 Aug 2006Shell Oil CompanyIn situ thermal processing of a coal formation using a movable heating element
US710099424 Oct 20025 Sep 2006Shell Oil Companyinjecting a heated fluid into the well bore, producing a second fluid from the formation, conducting an in situ conversion process in the selected section.
US710431924 Oct 200212 Sep 2006Shell Oil CompanyIn situ thermal processing of a heavy oil diatomite formation
US711456624 Oct 20023 Oct 2006Shell Oil CompanyHeat treatment using natural distributed combustor; oxidation of hydrocarbons to generate heat; pyrolysis
US712134124 Oct 200317 Oct 2006Shell Oil CompanyConductor-in-conduit temperature limited heaters
US712134223 Apr 200417 Oct 2006Shell Oil CompanyThermal processes for subsurface formations
US712815324 Oct 200231 Oct 2006Shell Oil CompanyTreatment of a hydrocarbon containing formation after heating
US715617624 Oct 20022 Jan 2007Shell Oil CompanyInstallation and use of removable heaters in a hydrocarbon containing formation
US716561524 Oct 200223 Jan 2007Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation using conductor-in-conduit heat sources with an electrically conductive material in the overburden
US718213215 Oct 200327 Feb 2007Independant Energy Partners, Inc.Linearly scalable geothermic fuel cells
US721973424 Oct 200322 May 2007Shell Oil CompanyInhibiting wellbore deformation during in situ thermal processing of a hydrocarbon containing formation
US722586631 Jan 20065 Jun 2007Shell Oil CompanyIn situ thermal processing of an oil shale formation using a pattern of heat sources
US732036422 Apr 200522 Jan 2008Shell Oil CompanyInhibiting reflux in a heated well of an in situ conversion system
US735387222 Apr 20058 Apr 2008Shell Oil CompanyStart-up of temperature limited heaters using direct current (DC)
US735718022 Apr 200515 Apr 2008Shell Oil CompanyInhibiting effects of sloughing in wellbores
US736058817 Oct 200622 Apr 2008Shell Oil CompanyThermal processes for subsurface formations
US737070422 Apr 200513 May 2008Shell Oil CompanyTriaxial temperature limited heater
US738387722 Apr 200510 Jun 2008Shell Oil CompanyTemperature limited heaters with thermally conductive fluid used to heat subsurface formations
US740444112 Mar 200729 Jul 2008Geosierra, LlcHydraulic feature initiation and propagation control in unconsolidated and weakly cemented sediments
US74100025 Aug 200412 Aug 2008Stream-Flo Industries, Ltd.Method and apparatus to provide electrical connection in a wellhead for a downhole electrical device
US742491522 Apr 200516 Sep 2008Shell Oil CompanyVacuum pumping of conductor-in-conduit heaters
US743107622 Apr 20057 Oct 2008Shell Oil CompanyTemperature limited heaters using modulated DC power
US743503721 Apr 200614 Oct 2008Shell Oil CompanyLow temperature barriers with heat interceptor wells for in situ processes
US746169123 Jan 20079 Dec 2008Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US748127422 Apr 200527 Jan 2009Shell Oil CompanyTemperature limited heaters with relatively constant current
US748624814 Jul 20033 Feb 2009Integrity Development, Inc.Microwave demulsification of hydrocarbon emulsion
US749066522 Apr 200517 Feb 2009Shell Oil CompanyVariable frequency temperature limited heaters
US750052821 Apr 200610 Mar 2009Shell Oil CompanyLow temperature barrier wellbores formed using water flushing
US751000022 Apr 200531 Mar 2009Shell Oil CompanyReducing viscosity of oil for production from a hydrocarbon containing formation
US752032523 Jan 200721 Apr 2009Geosierra LlcEnhanced hydrocarbon recovery by in situ combustion of oil sand formations
US752709421 Apr 20065 May 2009Shell Oil CompanyDouble barrier system for an in situ conversion process
US753371920 Apr 200719 May 2009Shell Oil CompanyWellhead with non-ferromagnetic materials
US754032419 Oct 20072 Jun 2009Shell Oil CompanyHeating hydrocarbon containing formations in a checkerboard pattern staged process
US754687321 Apr 200616 Jun 2009Shell Oil CompanyLow temperature barriers for use with in situ processes
US754947020 Oct 200623 Jun 2009Shell Oil CompanySolution mining and heating by oxidation for treating hydrocarbon containing formations
US755276213 Dec 200630 Jun 2009Stream-Flo Industries Ltd.Method and apparatus to provide electrical connection in a wellhead for a downhole electrical device
US755609520 Oct 20067 Jul 2009Shell Oil CompanySolution mining dawsonite from hydrocarbon containing formations with a chelating agent
US755609620 Oct 20067 Jul 2009Shell Oil CompanyVarying heating in dawsonite zones in hydrocarbon containing formations
US755936720 Oct 200614 Jul 2009Shell Oil CompanyTemperature limited heater with a conduit substantially electrically isolated from the formation
US755936820 Oct 200614 Jul 2009Shell Oil CompanySolution mining systems and methods for treating hydrocarbon containing formations
US756270620 Oct 200621 Jul 2009Shell Oil CompanySystems and methods for producing hydrocarbons from tar sands formations
US756270719 Oct 200721 Jul 2009Shell Oil CompanyHeating hydrocarbon containing formations in a line drive staged process
US757505221 Apr 200618 Aug 2009Shell Oil CompanyIn situ conversion process utilizing a closed loop heating system
US757505321 Apr 200618 Aug 2009Shell Oil CompanyLow temperature monitoring system for subsurface barriers
US758158920 Oct 20061 Sep 2009Shell Oil CompanyMethods of producing alkylated hydrocarbons from an in situ heat treatment process liquid
US758478920 Oct 20068 Sep 2009Shell Oil CompanyMethods of cracking a crude product to produce additional crude products
US759130623 Jan 200722 Sep 2009Geosierra LlcEnhanced hydrocarbon recovery by steam injection of oil sand formations
US759131020 Oct 200622 Sep 2009Shell Oil CompanyMethods of hydrotreating a liquid stream to remove clogging compounds
US759714720 Apr 20076 Oct 2009Shell Oil CompanyTemperature limited heaters using phase transformation of ferromagnetic material
US760405220 Apr 200720 Oct 2009Shell Oil CompanyCompositions produced using an in situ heat treatment process
US760405423 Jan 200720 Oct 2009Geosierra LlcEnhanced hydrocarbon recovery by convective heating of oil sand formations
US761096220 Apr 20073 Nov 2009Shell Oil CompanyProviding acidic gas to a subterrean formation, such as oil shale, by heating from an electrical heater and injecting through an oil wellbore; one of the acidic acids includes hydrogen sulfide and is introduced at a pressure below the lithostatic pressure of the formation to produce fluids; efficiency
US763168920 Apr 200715 Dec 2009Shell Oil CompanySulfur barrier for use with in situ processes for treating formations
US763169019 Oct 200715 Dec 2009Shell Oil CompanyHeating hydrocarbon containing formations in a spiral startup staged sequence
US763169125 Jan 200815 Dec 2009Exxonmobil Upstream Research CompanyMethods of treating a subterranean formation to convert organic matter into producible hydrocarbons
US763502320 Apr 200722 Dec 2009Shell Oil CompanyTime sequenced heating of multiple layers in a hydrocarbon containing formation
US763502419 Oct 200722 Dec 2009Shell Oil CompanyHeating tar sands formations to visbreaking temperatures
US763502520 Oct 200622 Dec 2009Shell Oil CompanyCogeneration systems and processes for treating hydrocarbon containing formations
US76409807 Apr 20085 Jan 2010Shell Oil CompanyThermal processes for subsurface formations
US764476519 Oct 200712 Jan 2010Shell Oil CompanyHeating tar sands formations while controlling pressure
US766965710 Oct 20072 Mar 2010Exxonmobil Upstream Research CompanyEnhanced shale oil production by in situ heating using hydraulically fractured producing wells
US767368119 Oct 20079 Mar 2010Shell Oil CompanyTreating tar sands formations with karsted zones
US767378620 Apr 20079 Mar 2010Shell Oil CompanyWelding shield for coupling heaters
US767731019 Oct 200716 Mar 2010Shell Oil CompanyCreating and maintaining a gas cap in tar sands formations
US767731419 Oct 200716 Mar 2010Shell Oil CompanyMethod of condensing vaporized water in situ to treat tar sands formations
US768164719 Oct 200723 Mar 2010Shell Oil CompanyMethod of producing drive fluid in situ in tar sands formations
US768329620 Apr 200723 Mar 2010Shell Oil CompanyAdjusting alloy compositions for selected properties in temperature limited heaters
US770351319 Oct 200727 Apr 2010Shell Oil CompanyWax barrier for use with in situ processes for treating formations
US771717119 Oct 200718 May 2010Shell Oil CompanyMoving hydrocarbons through portions of tar sands formations with a fluid
US773094519 Oct 20078 Jun 2010Shell Oil CompanyUsing geothermal energy to heat a portion of a formation for an in situ heat treatment process
US773094619 Oct 20078 Jun 2010Shell Oil CompanyTreating tar sands formations with dolomite
US773094719 Oct 20078 Jun 2010Shell Oil CompanyCreating fluid injectivity in tar sands formations
US77359351 Jun 200715 Jun 2010Shell Oil CompanyIn situ thermal processing of an oil shale formation containing carbonate minerals
US774845827 Feb 20066 Jul 2010Geosierra LlcInitiation and propagation control of vertical hydraulic fractures in unconsolidated and weakly cemented sediments
US778542720 Apr 200731 Aug 2010Shell Oil CompanyChromium, nickel, copper; niobium, iron manganese, nitrogen; nanonitrides; system for heating a subterranean formation;
US779372220 Apr 200714 Sep 2010Shell Oil CompanyNon-ferromagnetic overburden casing
US779822018 Apr 200821 Sep 2010Shell Oil CompanyIn situ heat treatment of a tar sands formation after drive process treatment
US779822131 May 200721 Sep 2010Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US783113321 Apr 20069 Nov 2010Shell Oil CompanyInsulated conductor temperature limited heater for subsurface heating coupled in a three-phase WYE configuration
US783113421 Apr 20069 Nov 2010Shell Oil CompanyGrouped exposed metal heaters
US783248418 Apr 200816 Nov 2010Shell Oil CompanyMolten salt as a heat transfer fluid for heating a subsurface formation
US784140119 Oct 200730 Nov 2010Shell Oil CompanyGas injection to inhibit migration during an in situ heat treatment process
US784140818 Apr 200830 Nov 2010Shell Oil CompanyIn situ heat treatment from multiple layers of a tar sands formation
US784142518 Apr 200830 Nov 2010Shell Oil CompanyDrilling subsurface wellbores with cutting structures
US784541119 Oct 20077 Dec 2010Shell Oil CompanyIn situ heat treatment process utilizing a closed loop heating system
US784992218 Apr 200814 Dec 2010Shell Oil CompanyIn situ recovery from residually heated sections in a hydrocarbon containing formation
US786037721 Apr 200628 Dec 2010Shell Oil CompanySubsurface connection methods for subsurface heaters
US786638520 Apr 200711 Jan 2011Shell Oil CompanyPower systems utilizing the heat of produced formation fluid
US786638613 Oct 200811 Jan 2011Shell Oil Companyproduction of hydrocarbons, hydrogen, and/or other products from various subsurface formations such as hydrocarbon containing formations through use of oxidizing fluids and heat
US786638813 Oct 200811 Jan 2011Shell Oil CompanyHigh temperature methods for forming oxidizer fuel
US786639515 Mar 200711 Jan 2011Geosierra LlcHydraulic fracture initiation and propagation control in unconsolidated and weakly cemented sediments
US787090412 Feb 200918 Jan 2011Geosierra LlcEnhanced hydrocarbon recovery by steam injection of oil sand formations
US788914629 Dec 200815 Feb 2011Enhanced Energy, Inc.Microwave demulsification of hydrocarbon emulsion
US791235820 Apr 200722 Mar 2011Shell Oil CompanyAlternate energy source usage for in situ heat treatment processes
US791827129 Jun 20095 Apr 2011Stream-Flo Industries Ltd.Method and apparatus to provide electrical connection in a wellhead for a downhole electrical device
US793108618 Apr 200826 Apr 2011Shell Oil CompanyHeating systems for heating subsurface formations
US794219721 Apr 200617 May 2011Shell Oil CompanyMethods and systems for producing fluid from an in situ conversion process
US79422034 Jan 201017 May 2011Shell Oil CompanyThermal processes for subsurface formations
US795045318 Apr 200831 May 2011Shell Oil CompanyDownhole burner systems and methods for heating subsurface formations
US79504569 Jun 201031 May 2011Halliburton Energy Services, Inc.Casing deformation and control for inclusion propagation
US798686921 Apr 200626 Jul 2011Shell Oil CompanyVarying properties along lengths of temperature limited heaters
US801145113 Oct 20086 Sep 2011Shell Oil CompanyRanging methods for developing wellbores in subsurface formations
US802757121 Apr 200627 Sep 2011Shell Oil CompanyIn situ conversion process systems utilizing wellbores in at least two regions of a formation
US804261018 Apr 200825 Oct 2011Shell Oil CompanyParallel heater system for subsurface formations
US807084021 Apr 20066 Dec 2011Shell Oil CompanyTreatment of gas from an in situ conversion process
US808299514 Nov 200827 Dec 2011Exxonmobil Upstream Research CompanyOptimization of untreated oil shale geometry to control subsidence
US808381320 Apr 200727 Dec 2011Shell Oil CompanyMethods of producing transportation fuel
US80874607 Mar 20083 Jan 2012Exxonmobil Upstream Research CompanyGranular electrical connections for in situ formation heating
US810453715 Dec 200931 Jan 2012Exxonmobil Upstream Research CompanyMethod of developing subsurface freeze zone
US811327213 Oct 200814 Feb 2012Shell Oil CompanyThree-phase heaters with common overburden sections for heating subsurface formations
US812295518 Apr 200828 Feb 2012Exxonmobil Upstream Research CompanyDownhole burners for in situ conversion of organic-rich rock formations
US814666113 Oct 20083 Apr 2012Shell Oil CompanyCryogenic treatment of gas
US814666421 May 20083 Apr 2012Exxonmobil Upstream Research CompanyUtilization of low BTU gas generated during in situ heating of organic-rich rock
US814666913 Oct 20083 Apr 2012Shell Oil CompanyMulti-step heater deployment in a subsurface formation
US815187413 Nov 200810 Apr 2012Halliburton Energy Services, Inc.Thermal recovery of shallow bitumen through increased permeability inclusions
US815187718 Apr 200810 Apr 2012Exxonmobil Upstream Research CompanyDownhole burner wells for in situ conversion of organic-rich rock formations
US81518809 Dec 201010 Apr 2012Shell Oil CompanyMethods of making transportation fuel
US815188410 Oct 200710 Apr 2012Exxonmobil Upstream Research CompanyCombined development of oil shale by in situ heating with a deeper hydrocarbon resource
US815190710 Apr 200910 Apr 2012Shell Oil CompanyDual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations
US816205913 Oct 200824 Apr 2012Shell Oil CompanyInduction heaters used to heat subsurface formations
US816240510 Apr 200924 Apr 2012Shell Oil CompanyUsing tunnels for treating subsurface hydrocarbon containing formations
US817233510 Apr 20098 May 2012Shell Oil CompanyElectrical current flow between tunnels for use in heating subsurface hydrocarbon containing formations
US817730510 Apr 200915 May 2012Shell Oil CompanyHeater connections in mines and tunnels for use in treating subsurface hydrocarbon containing formations
US819163028 Apr 20105 Jun 2012Shell Oil CompanyCreating fluid injectivity in tar sands formations
US819268226 Apr 20105 Jun 2012Shell Oil CompanyHigh strength alloys
US819665813 Oct 200812 Jun 2012Shell Oil CompanyIrregular spacing of heat sources for treating hydrocarbon containing formations
US82205399 Oct 200917 Jul 2012Shell Oil CompanyControlling hydrogen pressure in self-regulating nuclear reactors used to treat a subsurface formation
US822416324 Oct 200317 Jul 2012Shell Oil CompanyVariable frequency temperature limited heaters
US822416424 Oct 200317 Jul 2012Shell Oil CompanyInsulated conductor temperature limited heaters
US822416521 Apr 200617 Jul 2012Shell Oil CompanyTemperature limited heater utilizing non-ferromagnetic conductor
US822586621 Jul 201024 Jul 2012Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US823092716 May 201131 Jul 2012Shell Oil CompanyMethods and systems for producing fluid from an in situ conversion process
US823092917 Mar 200931 Jul 2012Exxonmobil Upstream Research CompanyMethods of producing hydrocarbons for substantially constant composition gas generation
US823378229 Sep 201031 Jul 2012Shell Oil CompanyGrouped exposed metal heaters
US823873024 Oct 20037 Aug 2012Shell Oil CompanyHigh voltage temperature limited heaters
US824077413 Oct 200814 Aug 2012Shell Oil CompanySolution mining and in situ treatment of nahcolite beds
US82565129 Oct 20094 Sep 2012Shell Oil CompanyMovable heaters for treating subsurface hydrocarbon containing formations
US82618329 Oct 200911 Sep 2012Shell Oil CompanyHeating subsurface formations with fluids
US82671709 Oct 200918 Sep 2012Shell Oil CompanyOffset barrier wells in subsurface formations
US82671859 Oct 200918 Sep 2012Shell Oil CompanyCirculated heated transfer fluid systems used to treat a subsurface formation
US827245513 Oct 200825 Sep 2012Shell Oil CompanyMethods for forming wellbores in heated formations
US827666113 Oct 20082 Oct 2012Shell Oil CompanyHeating subsurface formations by oxidizing fuel on a fuel carrier
US82818619 Oct 20099 Oct 2012Shell Oil CompanyCirculated heated transfer fluid heating of subsurface hydrocarbon formations
US832768118 Apr 200811 Dec 2012Shell Oil CompanyWellbore manufacturing processes for in situ heat treatment processes
US83279329 Apr 201011 Dec 2012Shell Oil CompanyRecovering energy from a subsurface formation
US83533479 Oct 200915 Jan 2013Shell Oil CompanyDeployment of insulated conductors for treating subsurface formations
US835562322 Apr 200515 Jan 2013Shell Oil CompanyTemperature limited heaters with high power factors
US838181518 Apr 200826 Feb 2013Shell Oil CompanyProduction from multiple zones of a tar sands formation
US84345559 Apr 20107 May 2013Shell Oil CompanyIrregular pattern treatment of a subsurface formation
US84487079 Apr 201028 May 2013Shell Oil CompanyNon-conducting heater casings
US845935918 Apr 200811 Jun 2013Shell Oil CompanyTreating nahcolite containing formations and saline zones
US848525211 Jul 201216 Jul 2013Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US853649713 Oct 200817 Sep 2013Shell Oil CompanyMethods for forming long subsurface heaters
US854002021 Apr 201024 Sep 2013Exxonmobil Upstream Research CompanyConverting organic matter from a subterranean formation into producible hydrocarbons by controlling production operations based on availability of one or more production resources
US855597131 May 201215 Oct 2013Shell Oil CompanyTreating tar sands formations with dolomite
US856207825 Nov 200922 Oct 2013Shell Oil CompanyHydrocarbon production from mines and tunnels used in treating subsurface hydrocarbon containing formations
US857903117 May 201112 Nov 2013Shell Oil CompanyThermal processes for subsurface formations
US859635510 Dec 20103 Dec 2013Exxonmobil Upstream Research CompanyOptimized well spacing for in situ shale oil development
US860609120 Oct 200610 Dec 2013Shell Oil CompanySubsurface heaters with low sulfidation rates
US86162797 Jan 201031 Dec 2013Exxonmobil Upstream Research CompanyWater treatment following shale oil production by in situ heating
US861628017 Jun 201131 Dec 2013Exxonmobil Upstream Research CompanyWellbore mechanical integrity for in situ pyrolysis
US862212717 Jun 20117 Jan 2014Exxonmobil Upstream Research CompanyOlefin reduction for in situ pyrolysis oil generation
US86221337 Mar 20087 Jan 2014Exxonmobil Upstream Research CompanyResistive heater for in situ formation heating
US86278878 Dec 200814 Jan 2014Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US86318668 Apr 201121 Jan 2014Shell Oil CompanyLeak detection in circulated fluid systems for heating subsurface formations
US863632325 Nov 200928 Jan 2014Shell Oil CompanyMines and tunnels for use in treating subsurface hydrocarbon containing formations
US864115011 Dec 20094 Feb 2014Exxonmobil Upstream Research CompanyIn situ co-development of oil shale with mineral recovery
US866217518 Apr 20084 Mar 2014Shell Oil CompanyVarying properties of in situ heat treatment of a tar sands formation based on assessed viscosities
US87017688 Apr 201122 Apr 2014Shell Oil CompanyMethods for treating hydrocarbon formations
US87017698 Apr 201122 Apr 2014Shell Oil CompanyMethods for treating hydrocarbon formations based on geology
US87398748 Apr 20113 Jun 2014Shell Oil CompanyMethods for heating with slots in hydrocarbon formations
US875290410 Apr 200917 Jun 2014Shell Oil CompanyHeated fluid flow in mines and tunnels used in heating subsurface hydrocarbon containing formations
US877028419 Apr 20138 Jul 2014Exxonmobil Upstream Research CompanySystems and methods of detecting an intersection between a wellbore and a subterranean structure that includes a marker material
USRE35696 *28 Sep 199523 Dec 1997Shell Oil CompanyHeat injection process
WO2001081715A224 Apr 20011 Nov 2001Shell Int ResearchMethod and system for treating a hydrocarbon containing formation
WO2001081722A124 Apr 20011 Nov 2001Shell Int ResearchA method for treating a hydrocarbon-containing formation
WO2001083945A124 Apr 20018 Nov 2001Shell Int ResearchA method for treating a hydrocarbon containing formation
WO2002086276A2 *24 Apr 200231 Oct 2002Shell Canada LtdMethod for in situ recovery from a tar sands formation and a blending agent produced by such a method
WO2005106195A122 Apr 200510 Nov 2005Shell Oil CoTemperature limited heaters with thermally conductive fluid used to heat subsurface formations
WO2006116078A121 Apr 20062 Nov 2006Shell Oil CoInsulated conductor temperature limited heater for subsurface heating coupled in a three-phase wye configuration
WO2006116097A121 Apr 20062 Nov 2006Shell Oil CoTemperature limited heater utilizing non-ferromagnetic conductor
Classifications
U.S. Classification166/302
International ClassificationC10G1/00, E21B43/16, C10G1/02, E21B43/24
Cooperative ClassificationC10G1/02, E21B43/2401
European ClassificationE21B43/24B, C10G1/02