CN104060974B - Deng the mobility displacement of reservoir oil and profile control integrated technique - Google Patents
Deng the mobility displacement of reservoir oil and profile control integrated technique Download PDFInfo
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- CN104060974B CN104060974B CN201410118513.2A CN201410118513A CN104060974B CN 104060974 B CN104060974 B CN 104060974B CN 201410118513 A CN201410118513 A CN 201410118513A CN 104060974 B CN104060974 B CN 104060974B
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Abstract
The invention discloses the mobility displacement of reservoir oils such as one and profile control integrated technique, solving oil reservoir profile control measures operates respectively with oil field injection technology, and profile control agent only has plugging action, does not has oil displacement efficiency, injectant to only have displacement of reservoir oil effect, the problem not having plugging effect.This technology utilizes chemical agent to inject from mobility three many rounds of slug such as well ends, and profile control agent is injected into corresponding well High water cut high bleed-through road from mobility three many rounds of slug such as oil well ends.The water in high infiltration territory in the middle of the height of two injectings, neutralization low concentration slug and two injectings dissolves each other, and is hypotonic district during high-efficient oil-displacing agent is squeezed in conjunction with being converted into the 3rd dose, the low wet crude of hypotonic band in displacement, raising swept volume and oil displacement efficiency；Technology has preferably reduction high bleed-through road mobility control water, low-permeability layer liquid-producing capacity in simultaneously improving, and improves effectively utilizing and oil displacement efficiency of injecting, minimizing injecting total amount and injection length and injection expense, and the system that totally realizes increases oil, the purpose of joint money.
Description
Technical field
The present invention relates to the profile control technology of oil reservoir in oilfield development process and the displacement of reservoir oil injection technology in oil field.
Background technology
At present, in oil field development injection process, oil reservoir profile control measures and oil field are injected does not has process integration and the consideration of three doses of unifications, profile control and injection are individually operated, and profile control agent only has plugging action, there is no oil displacement efficiency, injectant only has displacement of reservoir oil effect, there is no plugging effect, do not consider that deep profile controlling organically combines with injection technology, does not studies the problem acting on collaborative and maximizing the benefits, such as conventional method profile control, may be in any time period during water filling, chemical injection, not deep profile controlling, the collaborative consideration of injection technology effect efficiency；It addition, either oil reservoir deep profile controlling technology, or heavy crude heat extraction profile control technique, high permeability formation predominant pathway can be effectively blocked with existing profile control agent, but may produce oil layer blocking and pollution, impact height oozes the displacement of remaining oil in reservoir, does not all account for injecting deep profile controlling integrated technique simultaneously.
Summary of the invention
The purpose of the present invention is for problem present in background technology, it is provided that the mobility displacement of reservoir oil and the profile control integrated technique such as a kind of, in this technology, profile control agent both can play the effect of closure, has oil displacement efficiency simultaneously.
For achieving the above object, the technical solution used in the present invention is: the mobility displacement of reservoir oils such as one and profile control integrated technique, specifically comprising the following steps that of this technology
The first step: inject water and get through the passage between oil-water well；
Second step: inject chemical agent from mobility three many rounds of slug such as well ends, wherein:
The first round the first slug, low pressure 1-2 MPa injects the viscous chemical agent of height；
The first round the second slug, middle pressure 3-4 MPa is viscous chemical agent in injecting；
The first round the 3rd slug, high pressure 4-5 MPa injects low viscous chemical agent；
According to mobility three slugs such as identical injection mode inject second and third,---, n take turns chemical agent；
3rd step: from mobility three slug many rounds injection profile agent such as oil well ends, this profile control agent is identical material with the chemical agent from mobility three slug many rounds injections such as well ends described in back, the time that profile control agent injects at least waits until that the first round of second step injects and terminates to start again, and be injected simultaneously into the round corresponding to well end injection chemical agent, and first with discharge capacity 1-3.0m before injection profile agent3/ h, high pressure 4-5 MPa water filling form water channel, inject according to following order later:
The first round the first slug, low pressure 1-2 MPa injects the viscous profile control agent slug of height；
The first round the second slug, middle pressure 3-4 MPa is viscous profile control agent slug in injecting；
The first round the 3rd slug, high pressure 4-5 MPa injects water slug；
Next carry out the injection profile agent of 2-3 round according to identical injection mode, oil well end selects the chemical agent slug concentration that profile control agent slug concentration is corresponding more than well end, and slug amount and wheel number of times are respectively less than well end；
Oil well injects and terminates, and high pressure 4-5 MPa water filling is for squeezing；Oil well wouldn't drive a well, diffusion pressure 3-7 days, and pressure drop is to higher than opening well and making production after pressure 1MPa before measure；
4th step: the follow-up of well waits the mobility three many rounds of slug to continue to inject, identical with the mode of the slug that early stage is injected and injection.
Principle:
Chemical agent injects the displacement of reservoir oil from mobility three many rounds of slug such as well ends, and profile control agent is injected into corresponding well High water cut high bleed-through road from mobility three many rounds of slug such as oil well ends.Two injecting slugs are during earth formation deep moves closer to and docks, the water in high infiltration territory in the middle of the height of two injectings, neutralization low concentration slug and two injectings dissolves each other, being hypotonic district during high-efficient oil-displacing agent is squeezed in conjunction with being converted into the 3rd dose, in displacement, the low wet crude of hypotonic band improves swept volume and oil displacement efficiency；Terminating until oil well injects, chemical agent continues to inject from well, and profile control agent is reverse flow oil return well under the driving of chemical agent power.Chemical agent, profile control agent and the 3rd dose, collectively as main body injecting, drive the high, medium and low oil oozing district to flow out to oil well from low permeability district, improve displacement of reservoir oil swept volume and oil displacement efficiency.
Beneficial effects of the present invention:
1, mobility injection profile injecting total amount and the operating expenses such as minimizing, realize profile control, the displacement of reservoir oil and synergism simultaneously.Owing to the generation of the 3rd dose adds effective injecting amount relatively；Certain well layer can be reduced oil-water well total injection relatively.And owing to being injected separately into and the generation of the 3rd dose from oil well and well two ends, save injection length, decrease total injection；
2, the profile control agent injected from oil well finally terminates with low concentration slug and water in hot pursuit, injection terminates the second slug of rear oil well end injection and is reverse flowed to well wellbore, being low, medium and high near pit shaft to the slug order in oil reservoir deep, all is water in hot pursuit or low concentration slug by pit shaft.Be conducive to improving oil well liquid-producing ability and profile control effect, extend the expiration date and make nearly well less permeable layer effectively be employed；
3, from the mobility slugs such as well injection to oil well end, injecting Mud Property is serious, consumed energy greatly, the longest.Injecting injecting at the mobility profile control such as oil well, to glue loss rate and energy loss low more than injecting from well.Have and preferably reduce high bleed-through road mobility control water, low-permeability layer liquid-producing capacity in simultaneously improving, effectively utilizing and oil displacement efficiency of raising injecting, reduce injecting total amount and injection length and injection expense, totally realize system effect benefit collaborative increasing oil joint money；
4, the mobility profile control specific aim such as oil well is higher, the mobility profile controls such as the mobilities such as well inject to surrounding oil well profile control, but can not look after the individual character of each oil well, oil well can be in conjunction with the actual characteristic design of concrete oil well, specific aim is higher, whole structure is more preferable, and effect duration is longer.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further illustrated:
Illustrate as a example by the well Y63, oil well Y45 in 2-6 oil field, the east area of the Liao River, coextensive with eastern and southern Liaoning Province:
The first step: inject water and get through the passage between oil-water well, inject 0.1pv；
Second step: inject chemical agent from mobility three many rounds of slug such as Y63 well ends, chemical agent used uses the slug host described in invention entitled " patent non-homogeneous pay multi-block equal-fluidity energy-gathering parallel synchronous flooding method (200610058762.2) ".Method for implanting is too with reference to method described in this patent of invention.
1. the first round injects first, second and third slug, and concrete injection parameter is shown in Table 1；
2. second taking turns injection first, second and third slug, concrete injection parameter is shown in Table 1；
2. third round injects first, second and third slug, and concrete injection parameter is shown in Table 1；
Three slug chemical agent injection tables taken turns by table 1 Y63 well first, second and third
| Slug number | First slug height glues injecting | Viscous injecting in second slug | The second low viscous injecting of slug |
| Concentration PPm | 1200 | 900 | 700 |
| Viscosity mPa.s | 70 | 30 | 15 |
| Injection pressure MPa | 1-3 | 3-4 | 4-5 |
| Injection length d | 30 | 90 | 250 |
| Day real note m3 | 27 | 46 | 67 |
| Slug amount m3 | 810 | 4050 | 16750 |
3rd step: from mobility three slug many rounds injection profile agent such as Y45 oil well ends, injection profile agent is taken turns injection and is synchronization carried out, specifically comprises the following steps that with Y63 well second
1. first with discharge capacity 3.0 m3 / h, high pressure 4-5 MPa injected clear water slug 300 m3；
2. the first round the first slug: low pressure 1-2 MPa, injects high concentration 2500mg/L profile control agent 300 m3
；
The first round the second slug: middle pressure 3-4 MPa injects low concentration 1500mg/L profile control agent 300 m3；
The first round the 3rd slug: high pressure 4-5 MPa, injected clear water slug 300 m3；
3. second take turns the first slug: low pressure 1-2 MPa, note people high concentration slug 2500mg/L profile control agent 300 m3；
Second takes turns the second slug: middle pressure 3-4 MPa injects low concentration 1500mg/L profile control agent 300 m3；
Second takes turns the 3rd slug: high pressure 4-5 MPa injected clear water slug 300 m3；
After profile control has been constructed, oil well wouldn't drive a well, diffusion pressure 7 days, and pressure drop is to higher than pressure 1MPa opening well and making production before measure.
4th step: the follow-up of well waits mobility slug to continue to inject, and oil well slug is reverse flow under well chemical agent drives.
The mobility profile control measures effect analyses such as Y45 oil well
1) this technology oil-water well uses chemical pouring agent of the same race to be injected separately into from oil well, well with different concentration, slug length, realize the mobility injection profile integrations such as oil-water well, function fully meets closure high permeability formation predominant pathway, and the requirement in the hypotonic low water-bearing layer of displacement, profile control technology has been implemented smoothly；
2), after the mobility profile control such as Y45 oil well, it is obvious that Y45 oil well increases oil descending liquid effect, and the moon, production fluid was from 300 m3It is reduced to 120m3, reduce by 180 m3, reduce 60%；The moon, oil-producing was from 1.5 m3/ d brings up to 3.0m3/ d, increases oily 1.5 m the moon3/d
, and steadily increasing, aqueous to drop to 78% from 99.6% more stable.Producing fluid level is reduced to 447m from 340 m, and submergence is reduced to 14 m from 121 m.
In sum, above example is only the preferably enforcement example of the present invention, is not limited to the present invention；All other is modified or displacement without departing from the equivalent of the present invention, is intended to be limited solely by the scope of the invention.
Claims (1)
1. one kind is waited the mobility displacement of reservoir oil and profile control integral method, it is characterised in that: specifically comprising the following steps that of the method
The first step: inject water and get through the passage between oil-water well；
Second step: inject chemical agent from mobility three many rounds of slug such as well ends, wherein:
The first round the first slug, low pressure 1-2 MPa injects the viscous chemical agent of height；
The first round the second slug, middle pressure 3-4 MPa is viscous chemical agent in injecting；
The first round the 3rd slug, high pressure 4-5 MPa injects low viscous chemical agent；
According to mobility three slugs such as identical injection mode inject second and third,---, n take turns chemical agent；
3rd step: from mobility three slug many rounds injection profile agent such as oil well ends, this profile control agent is identical material with the chemical agent from mobility three slug many rounds injections such as well ends described in back, the time that profile control agent injects at least waits until that the first round of second step injects and terminates to start again, and be injected simultaneously into the round corresponding to well end injection chemical agent, and first with discharge capacity 1-3.0m before injection profile agent3 / h, high pressure 4-5 MPa water filling form water channel, inject according to following order later:
The first round the first slug, low pressure 1-2 MPa injects the viscous profile control agent slug of height；
The first round the second slug, middle pressure 3-4 MPa is viscous profile control agent slug in injecting；
The first round the 3rd slug, high pressure 4-5 MPa injects water slug；
Next carry out the injection profile agent of 2-3 round according to identical injection mode, oil well end selects the chemical agent slug concentration that profile control agent slug concentration is corresponding more than well end, and slug amount and wheel number of times are respectively less than well end；
Oil well injects and terminates, and high pressure 4-5 MPa water filling is for squeezing；Oil well wouldn't drive a well, diffusion pressure 3-7 days, and pressure drop is to higher than opening well and making production after pressure 1MPa before measure；
4th step: the follow-up of well waits the mobility three many rounds of slug to continue to inject, identical with the mode of the slug that early stage is injected and injection.
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| CN201410118513.2A CN104060974B (en) | 2014-03-27 | 2014-03-27 | Deng the mobility displacement of reservoir oil and profile control integrated technique |
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| CN201410118513.2A CN104060974B (en) | 2014-03-27 | 2014-03-27 | Deng the mobility displacement of reservoir oil and profile control integrated technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259410A (en) * | 2019-06-28 | 2019-09-20 | 山东德仕石油装备有限公司 | A kind of method that high-water-cut oil-producing well fixed tubular column realizes water blockoff |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105317412A (en) * | 2015-09-29 | 2016-02-10 | 大庆华澳盛丰油田技术服务有限公司 | Low-permeability oilfield energy-gathering equi-fluidity oil displacement method |
| CN107218020A (en) * | 2017-08-06 | 2017-09-29 | 大庆东油睿佳石油科技有限公司 | A kind of double slug type profile control agents of poly- table of hypertonic sandstone oil reservoir and its application method |
| CN107218009A (en) * | 2017-08-06 | 2017-09-29 | 大庆东油睿佳石油科技有限公司 | A kind of low-permeability sandstone oil reservoir chromium aluminium ion compounding profile control agent and its application method |
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