CA2514609A1 - Measuring equipment and method for mapping the geology in an underground formation - Google Patents

Measuring equipment and method for mapping the geology in an underground formation Download PDF

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Publication number
CA2514609A1
CA2514609A1 CA002514609A CA2514609A CA2514609A1 CA 2514609 A1 CA2514609 A1 CA 2514609A1 CA 002514609 A CA002514609 A CA 002514609A CA 2514609 A CA2514609 A CA 2514609A CA 2514609 A1 CA2514609 A1 CA 2514609A1
Authority
CA
Canada
Prior art keywords
transmitter
measuring equipment
coil
receiving coil
magnetic field
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002514609A
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French (fr)
Other versions
CA2514609C (en
Inventor
Kurt I. Sorensen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BUBIOIL APS
Original Assignee
Kurt I. Sorensen
Bubioil Aps
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kurt I. Sorensen, Bubioil Aps filed Critical Kurt I. Sorensen
Priority to CA2785717A priority Critical patent/CA2785717C/en
Publication of CA2514609A1 publication Critical patent/CA2514609A1/en
Application granted granted Critical
Publication of CA2514609C publication Critical patent/CA2514609C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils
    • G01V3/105—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops
    • G01V3/107—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops using compensating coil or loop arrangements

Abstract

The invention relates to measuring equipment and method for mapping the geology in an underground formation (2) by means of transient electromagnetic sounding. The measuring equipment (1) comprises a transmitter circuit 4 with a current source for generating an electric current and a transmitter coil (6;
28; 30); a switch for connecting the current source to the transmitter coil during operation so that an electric current is generated in this one, said current builds up a magnetic field in the formation (2), and for cutting off this current again so that the built-up magnetic field in the formation decays; and a receiving circuit with a receiving coil for registering the voltage induced over the receiving coil. By placing the receiving coil (7) in an area (19) where the magnetic field strength is small, the transmitter coils (6; 28; 30) are placed closely above each other, the wire (24; 25) of the transmitter coil (6; 28; 30) is composed of a number of electrically insulated cores (23), and there is a preamplifier (17) for amplifying the registered voltage (Vrcoil) from the receiving coil (7) and the second electrical switch (21) for disconnecting the connection between the receiving coil (7) and the preamplifier (17), a measuring equipment can be provided that is so compact that it can be used for e.g. airborne transient sounding.

Claims (12)

1. Measuring equipment for mapping the geology in an underground formation, and comprising - at least one transmitter circuit (4) with at least one transmitter coil (6;28;30) and a current source (11), - at least one switch (13) which is inserted between the current source (11) and the at least one transmitter coil (6) and which serves to connect the current source (11) of the at least one transmitter circuit (4) with the at least one transmitter coil (6;28;30) during operation thereby generating an electrical current (I T) for building up a magnetic field in the formation and to cut off the electrical current (I) again thereby causing the built up magnetic field in the formation to decay, - at least one receiving circuit (5) with at least one receiving coil (7), and - that the at least one receiving coil (7) is placed in an area (19) where the induction in the receiving coil from the current in the transmitter coil (6;28;30) is zero or minimal.
characterized in - that the plane of the at least one receiving coil is placed in a tangential plane to a field line in the magnetic field, and - that the at least one receiving coil have the same planar orientation as the at least one transmitter coil.
2. Measuring equipment according to claim 1, characterized in that the plane of the receiving coil is parallel to the plane of the transmitter coil.
3. Measuring equipment according to claim 1 or 2, characterized in that the measuring equipment comprises two transmitting circuits (4).
4. Measuring equipment according to claim 1, 2 or 3, characterized in that the measuring equipment comprises two transmitter coils (6;28;30) which are placed close above each other.
5. Measuring equipment according to any of the claims 1 -4, characterized in that the wire (24;25) of the transmitter coil (6;28;30) is put together by a number of electrically insulated cores (23).
6. Measuring equipment according to any of the claim 1-5, characterized, in that a receiving unit (18) is inserted in the at least one receiving circuit (5) for registering the voltage (V Rcoil) which is induced over the receiving coil (7).
7. Measuring equipment according to any of the claims 1 -6, characterized in that the transmitter coils (6;28;30) have a different number of turns.
8. Measuring equipment according to any of the claims 1 -7, characterized in that the transmitter coils (6;28;30) are applied currents (I T) of different values.
9. Measuring equipment according to any of the claims 1 -8, characterized in that the transmitter coil (6;28;30) has an area of 10×10 m and that the amperage of the electrical current (I T) in the transmitter coil is between 10 and 70 ampere, preferably between 20 - 60 ampere.
10. Measuring equipment according to any of the claims 1 -9, characterized in that the receiving coil (7) has an area of 50 × 50 cm.
11. Method for mapping the geology in an underground formation, and comprising - that a magnetic field is built up in the formation by generating an electrical current (I T) in at least one transmitter coil (6;28;30) which is placed over the formation, - that the magnetic field is brought to decay by cutting off the current (I T), - that a representation of the decay is measured as the voltage (V Rcoil) which is created across a receiving coil (7) during influence from the decay, - that the measurement is done in an area (19) where the magnetic field strength from the transmitter coil (6;28;30) is zero or very small, - characterized in, - that the measurement is done when the plane of the at least one receiving coil is placed in a tangential plane to a field line in the magnetic field, and - that the measurement is done when the plane of the receiving coil is parallel to the plane of the transmitter coil.
12. Method for mapping the geology in an underground formation according to claim 11, characterized in - that at least two transmitter coils (6;28;30) are used which are placed closely above each other.
CA2514609A 2003-02-13 2004-02-13 Measuring equipment and method for mapping the geology in an underground formation Expired - Lifetime CA2514609C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2785717A CA2785717C (en) 2003-02-13 2004-02-13 Measuring equipment and method for mapping the geology in an underground formation

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DKPA200300222 2003-02-13
DKPA200300222 2003-02-13
PCT/DK2004/000102 WO2004072684A1 (en) 2003-02-13 2004-02-13 Measuring equipment and method for mapping the geology in an underground formation

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA2785717A Division CA2785717C (en) 2003-02-13 2004-02-13 Measuring equipment and method for mapping the geology in an underground formation

Publications (2)

Publication Number Publication Date
CA2514609A1 true CA2514609A1 (en) 2004-08-26
CA2514609C CA2514609C (en) 2012-11-06

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Family Applications (2)

Application Number Title Priority Date Filing Date
CA2514609A Expired - Lifetime CA2514609C (en) 2003-02-13 2004-02-13 Measuring equipment and method for mapping the geology in an underground formation
CA2785717A Expired - Lifetime CA2785717C (en) 2003-02-13 2004-02-13 Measuring equipment and method for mapping the geology in an underground formation

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA2785717A Expired - Lifetime CA2785717C (en) 2003-02-13 2004-02-13 Measuring equipment and method for mapping the geology in an underground formation

Country Status (6)

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US (1) US7053622B2 (en)
EP (2) EP1597610B1 (en)
AU (2) AU2004211663B2 (en)
CA (2) CA2514609C (en)
DK (1) DK1597610T3 (en)
WO (1) WO2004072684A1 (en)

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CA2689627A1 (en) * 2007-07-03 2009-01-08 Shell Internationale Research Maatschappij B.V. Down-hole transmitter system, method of inducing a transient electromagnetic field in an earth formation, method of obtaining a transient electromagnetic response signal, and method of producing a hydrocarbon fluid
GB2463201B (en) * 2007-07-03 2012-01-11 Shell Int Research Transmitter system, method of inducing a transient electromagnetic field in an earth formation,method of obtaining a transient electromagnetic response signal
US8258784B2 (en) * 2007-07-03 2012-09-04 Shell Oil Company System and method for measuring a time-varying magnetic field and method for production of a hydrocarbon fluid
US8269501B2 (en) * 2008-01-08 2012-09-18 William Marsh Rice University Methods for magnetic imaging of geological structures
US9222350B2 (en) 2011-06-21 2015-12-29 Diamond Innovations, Inc. Cutter tool insert having sensing device
US10191175B2 (en) 2011-06-24 2019-01-29 Skytem Survey Aps Method and system for mapping a geological structure of a formation on one side of a surface using magnetic moments of different values
DK177341B1 (en) * 2011-06-24 2013-01-28 Bubioil Aps Method and system for mapping a geological structure of a formation on one side of a surface using magnetic moments of different values
CN104237956B (en) * 2014-03-06 2017-07-04 长安大学 The air-ground detection method of grounded source transient electromagnetic
DK178049B1 (en) 2014-03-17 2015-04-13 Selskabet Af 6 April 2010 Aps Airborne Electromagnetic Survey System with Multiple Transmitter Arrangements
WO2015162493A2 (en) 2014-04-23 2015-10-29 Cgg Services Sa Systems and methods for multiple bandwidth electromagnetic geophysical exploration
AU2015207977B2 (en) 2014-08-06 2021-01-21 Xcalibur Mph Switzerland Sa Systems and methods for active cancellation of transient signals and dynamic loop configuration
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CN105510984B (en) * 2015-12-18 2018-01-05 中国石油天然气集团公司 A kind of detection method and device based on Loop source transient electromagnetic method
CN105549100B (en) * 2016-01-07 2017-08-25 华北科技学院 Transient Electromagnetic Method in Mine apparatus and method based on U-shaped helical source
CN105911600A (en) * 2016-05-15 2016-08-31 吉林大学 Matching circuit of tunnel transient electromagnetic coincident loop receiving coil
CN105891892A (en) * 2016-06-12 2016-08-24 何继善 Device and method for whole-region measurement of vertical components of current source frequency domain magnetic fields
CN105974487A (en) * 2016-06-12 2016-09-28 何继善 Device and method for performing full-area measurement on electric field component Ephi of current source frequency domain
CN105866844A (en) * 2016-06-12 2016-08-17 何继善 Device and method for measuring whole region measuring current source frequency domain electric field horizontal x component
CN109061742B (en) * 2018-08-29 2020-05-12 中国地质科学院地球物理地球化学勘查研究所 Aviation transient electromagnetic receiving signal gain automatic control circuit
CN109765627B (en) * 2019-03-08 2020-04-03 中南大学 Plane wave electromagnetic depth sounding method suitable for mountainous region
CN109946744B (en) * 2019-04-01 2020-07-07 吉林大学 Transient electromagnetic exploration system and method based on controllable source compensation
CN110187395B (en) * 2019-06-24 2020-12-01 安徽理工大学 Zero-magnetic-flux shallow transient electromagnetic test coil and test method thereof
CN110658561B (en) * 2019-09-25 2021-04-13 山东大学 Transient electromagnetic wire frame and receiving probe fixing device and using method
CN111313916B (en) * 2020-03-31 2024-03-08 湖南科技大学 Signal transmitting device and method for reducing transient electromagnetic turn-off time
WO2022034115A1 (en) 2020-08-12 2022-02-17 Selskabet Af 6. April 2010 Aps Suspension of electromagnetic receiver coil
CN111980756B (en) * 2020-09-01 2021-12-03 兖矿集团有限公司 Abnormity monitoring method and abnormity monitoring system for mine roof
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CN116400423B (en) * 2023-06-07 2023-09-26 四川中水成勘院工程物探检测有限公司 8-shaped compensation type transient electromagnetic vector antenna and underground pipeline direction detection method

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US11016215B2 (en) 2014-02-28 2021-05-25 Selskabet Af 6. April 2010 Aps Airborne electromagnetic survey system with aerodynamic frame segments; and methods of surveying using such

Also Published As

Publication number Publication date
EP1597610A1 (en) 2005-11-23
AU2004211663A1 (en) 2004-08-26
CA2514609C (en) 2012-11-06
US7053622B2 (en) 2006-05-30
WO2004072684A1 (en) 2004-08-26
EP1597610B1 (en) 2015-05-06
EP2237074A2 (en) 2010-10-06
EP2237074A3 (en) 2016-11-02
AU2010202329A1 (en) 2010-07-01
DK1597610T3 (en) 2015-06-15
CA2785717A1 (en) 2004-08-26
CA2785717C (en) 2016-07-12
AU2004211663B2 (en) 2010-03-04
AU2010202329B2 (en) 2012-05-31
US20060015255A1 (en) 2006-01-19

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