CN101446194B - Drilling fluid leak hunting device based on transient electromagnetic method - Google Patents
Drilling fluid leak hunting device based on transient electromagnetic method Download PDFInfo
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- CN101446194B CN101446194B CN2008102365334A CN200810236533A CN101446194B CN 101446194 B CN101446194 B CN 101446194B CN 2008102365334 A CN2008102365334 A CN 2008102365334A CN 200810236533 A CN200810236533 A CN 200810236533A CN 101446194 B CN101446194 B CN 101446194B
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Abstract
A drilling fluid leak hunting device based on the transient electromagnetic method comprises a ground structure and a underground structure, wherein, the ground structure comprises a rectangular loop-line 1 which is laid on the ground, and the two ends of the rectangular loop-line 1 are connected with the pulse power supply output terminal of a transmitter 2 respectively; the underground structure which comprises a drill pipe 4 is placed in a well hole 3; the drill pipe 4 is equipped with a transient electromagnetic receiving structure 5 and a drilling fluid flow velocity structure 6 measured by a ultrasonic wave sensor. The device is characterized in that the drilling fluid flow velocity is measured by the ultrasonic wave sensor to judge leakage positions; and the formation characteristic in leakage areas is detected by utilizing transient electromagnetic method to better guide plugging measure. By the mutual complementation and the mutual verification of the two measuring methods, the device has the characteristics that the result is visual; the measuring accuracy is high; the operation is convenient; the plugging can be effectively guided; the drilling cost is greatly saved; and the pollution to the stratum is reduced.
Description
Technical field
The invention belongs to the drilling fluid technical field of leaking hunting, particularly a kind of device that utilizes transient electromagnetic method measuring drilling fluid leak position and leakage place formation characteristics.
Background technology
In the drilling process,, cause drilling fluid leakage because the complexity of earth formation usually can run into crack and the stratum that hole is arranged; Not only influence the progress of drilling engineering, cause unnecessary loss economically, and drilling fluid is a kind of hazardous substances; Contain chemical treatments such as multiple strong acid, highly basic, wherein potassium ion, bolognian stone are noxious materials, can pollute underground water resource and stratum after the leakage; This pollution is long-term, is difficult to administer, and seriously injures descendants's living environment.Therefore need after leakage takes place, find out leak position as early as possible, in time take effective leaking-stopping measure, not contaminated with protection stratum and groundwater resources, realize the harmonious development of resource exploitation and environmental protection.
It is technical barrier both domestic and external for many years that drilling fluid leaks hunting; The flow of main measuring drilling fluid, the leakage situation that pressure and temperature is judged drilling fluid in the prior art; The technology of its utilization mainly comprises the use of various flow meters; Concrete condition is following: one, the patent No. by Tokico Ltd's application is 89104405.1 " vortex shedding flowmeter " patent; Proposed a kind of method of measuring fluid rate, it is to utilize vortex generator in fluid, to produce the toll bar vortex, and the ultrasonic wave phase place that causes propagating in the fluid changes and through detecting the device of measuring rate of flow of fluid of toll bar vortex.This measurement mechanism need be installed a vortex generator, structure more complicated.And, contain movable members such as rotor in the employed flow meter owing to receive the restriction of measurement environment itself, and movable member very easily receives the influence of the grains of sand in the drilling fluid and cause and measure unreliable or fail.Shortcomings such as and Russia adopts mobilizable mechanical flow device, exists device heavy, and mechanical parts is easy to wear.Two, domestic patent " leakage leak-off velocity and loss horizon measuring instrument " (patent No. is 98235961.6) has proposed a kind of method of measuring the leakage position; Wherein mention pressure, temperature and the flow of measuring drilling fluid; Comprehensively ask speed and the rule of calculating leakage through pressure and data on flows, comprehensively judge leak position according to the variation of temperature and data on flows.This apparatus structure more complicated, and because the sensitive area of pressure sensor is easy in the obstruction of impurity such as the grains of sand in the drilling fluid, thereby the stability of system influenced; In addition since the not real-time that formation temperature, receives temperature propagation with its degree of depth and linear change overhead and wastage than the influence of factors such as hour variations in temperature is not obvious.Three, domestic patent " a kind of drilling fluid leak-checking apparatus " (ZL200420085843.8) (ZL200420085844.2) has proposed a kind of frame for movement and circuit structure of confirming drop ply position that utilizes ultrasonic sensor to survey the drilling fluid flow velocity with " a kind of measuring drilling fluid leakage circuit ".Though the precision of ultrasonic sensor velocity measurement is higher; And do not receive the influence of drilling fluid medium, but it can only provide the leakage position of stratum, can not judge the strata condition at leakage points place; And the circuit structure that proposes is to calculate the time difference that ultrasonic wave is propagated by DSP, and ratio of precision is lower.Four, mention the method for using electromagnetic flowmeter survey drilling fluid flow velocity in the paper of delivering by Liu of Changjiang University minor benefit, Xia Hongnan etc. " cable type down-hole leak detector development pre-test " and judged leak position (seeing the 13rd the 4th phase of volume of " tomography oil gas field " July in 2006).The electromagnetic interference that electromagnetic flowmeter itself produces will exert an influence to the operate as normal of electronic circuit, causes system to be run flying even the generation of the phenomenon that crashes, and the cable type measuring apparatus is easy to run into the danger that is blocked simultaneously.Above technical scheme adopts the method for measuring drilling fluid flow velocity to reach the position of judging drilling fluid leakage, but does not reach the purpose of the stratum condition of test leakage points.
Judge that through surveying earth formation and formation fracture the document of drilling fluid leakage situation and device do not appear in the newspapers.But the correlation technique of surveying formation fracture mainly is the logging method of sound wave amplitude, and it is the amplitude that writes down compressional wave and shear wave simultaneously.When in the rock stratum, not having the crack, the sound wave amplitude is very big; During through slit band, 10～20 times of amplitude fadings.Compressional wave decay in vertical and crack high angle is bigger, and shear wave to level relatively more responsive with low-angle crack, and postpones at the slit band shear wave and to arrive.And in drilling process,, be unfavorable for the propagation of sound wave because the existence of solid particle in the drilling fluid will make sound wave produce bigger refraction and reflection.
Summary of the invention
Overcome the deficiency of above-mentioned prior art, the object of the present invention is to provide a kind of drilling fluid leak hunting device based on transient electromagnetic method, utilize this device can reach the purpose of measuring drilling fluid leak position and leakage place formation characteristics.This device adopts ultrasonic sensor to survey the drilling fluid flow velocity, judges the position of leakage, utilizes transient electromagnetic method to survey the formation characteristics of leakage points simultaneously; Better to instruct leaking-stopping measure, two kinds of measuring methods that adopt in this device are replenished each other, each other confirmation; Have visual result, certainty of measurement height, easy to operate; Can effectively instruct leak stopping, and practice thrift drilling cost greatly, reduce pollution the stratum.
In order to achieve the above object, technical scheme of the present invention is:
A kind of drilling fluid leak hunting device based on transient electromagnetic method is made up of earth construction and underground structure two parts, and earth construction comprises the rectangular loop 1 that is layed in ground, and the two ends of rectangular loop 1 link to each other with the pulse power output of emitter 2 respectively; Underground structure is transferred in the wellhole 3, comprises drilling rod 4, disposes transient electromagnetic on the drilling rod 4 and receives structure 5 and ultrasonic sensor measuring drilling fluid flow velocity structure 6.
Described transient electromagnetic receives structure 5 and comprises receiving coil 9 and outside guard member 10, and the terminals of receiving coil 9 are connected with the terminals of transient electromagnetic circuit board for receiving 7 respectively, and battery pack 8 is connected power supply with transient electromagnetic circuit board for receiving 7.
Output signal end that ultrasonic sensor 12,13, ultrasonic sensor 12,13 are installed on the described measuring drilling fluid flow velocity structure 6 is connected on the drilling fluid flow velocity measuring circuit plate 11, and battery pack 14 is connected power supply with drilling fluid flow velocity measuring circuit plate 11.
Described transient electromagnetic circuit board for receiving 7; The output that comprises the front end signal modulate circuit 15 that is connected with receiving coil 9, front end signal modulate circuit 15 is connected with the input of floating-point amplifying circuit 16, the input of output connection mode number conversion (A/D) circuit 17 of floating-point amplifying circuit 16; The output of analog-to-digital conversion (A/D) circuit 17 connects the input of DSP circuit 19; The storage output of DSP circuit 19 is connected with memory circuit 21; CPLD circuit 18 is connected with floating-point amplifying circuit 16 with analog-to-digital conversion (A/D) circuit 17, DSP circuit 19; DSP circuit 19 is connected with the serial communication interface of communication interface circuit 20, and the low supply voltage of power circuit 22 outputs is connected on the power pin of DSP circuit 19 and CPLD circuit 18.
Described ultrasonic sensor 12,13 center lines are coaxial and parallel with borehole axis.
Described rectangular loop 1 is the transmitting coil of transient electromagnetic, and insulate with the earth, and the length of side of rectangular loop 1 is confirmed according to drilling depth.
Described receiving coil 9 has one at least, and receiving coil 9 comprises three mutually perpendicular coil 9a, 9b, 9c.
The present invention utilizes transient electromagnetic method to survey drilling fluid leakage position and leakage points stratum condition, adopts ground-well construction, and wiring is simple; Underground structure is short and small, is convenient to execute-in-place, and certainty of measurement is high; Can effectively instruct leak stopping; And practiced thrift drilling cost greatly, and having reduced pollution to the stratum, the present invention can also be used for exploration and the hydrogeology of well mineral reserve, petroleum resources, petrotectonic reconnoitring.
Description of drawings
Fig. 1 is a structure principle chart of the present invention.
Fig. 2 is the structure chart of receiving coil of the present invention 9, transient electromagnetic circuit board for receiving 7.
The specific embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and operating principle are done and to be described in further detail.
With reference to Fig. 1, a kind of drilling fluid leak hunting device based on transient electromagnetic method is made up of earth construction and underground structure two parts, and earth construction comprises the rectangular loop 1 that is layed in ground, and the two ends of rectangular loop 1 link to each other with the pulse power output of emitter 2 respectively; Underground structure is transferred in the wellhole 3, comprises drilling rod 4, disposes transient electromagnetic on the drilling rod 4 and receives structure 5 and ultrasonic sensor measuring drilling fluid flow velocity structure 6.
Described transient electromagnetic receives structure 5 and comprises receiving coil 9 and outside guard member 10, and the terminals of receiving coil 9 are connected with the terminals of transient electromagnetic circuit board for receiving 7 respectively, and battery pack 8 is connected power supply with transient electromagnetic circuit board for receiving 7.
Output signal end that ultrasonic sensor 12,13, ultrasonic sensor 12,13 are installed on the described measuring drilling fluid flow velocity structure 6 is connected on the drilling fluid flow velocity measuring circuit plate 11, and battery pack 14 is connected power supply with drilling fluid flow velocity measuring circuit plate 11.
Described ultrasonic sensor 12,13 center lines are coaxial and parallel with borehole axis.
Described rectangular loop 1 is the transmitting coil of transient electromagnetic, and its length of side is confirmed according to drilling depth, and insulated with the earth.
With reference to Fig. 2; Receiving coil 9 comprises three mutually perpendicular coil 9a, 9b, 9c; Transient electromagnetic circuit board for receiving 7 comprises that the output of the front end signal modulate circuit 15 that is connected with receiving coil 9, front end signal modulate circuit 15 is connected with the input of floating-point amplifying circuit 16, the input of output connection mode number conversion (A/D) circuit 17 of floating-point amplifying circuit 16; The output of analog-to-digital conversion (A/D) circuit 17 connects the input of DSP circuit 19; The storage output of DSP circuit 19 is connected with memory circuit 21; CPLD circuit 18 is connected with DSP circuit 19 with floating-point amplifying circuit 16, analog-to-digital conversion (A/D) circuit 17, and DSP circuit 19 is connected with the serial communication interface of communication interface circuit 20, and the low supply voltage of power circuit 22 outputs is connected on the power pin of DSP circuit 19 and CPLD circuit 18.
Operating principle of the present invention is: feed pulsed current signal in the rectangular loop 1, this pulsed current signal is provided by emitter 2, and underground structure is lowered in the wellhole 3; Ultrasonic sensor 12,13 is through measuring the time difference that ultrasonic wave is propagated in drilling fluid; And then measure the flow velocity of drilling fluid in the wellhole, and and measurement result being stored in the memory of drilling fluid flow velocity measuring circuit plate 11, device is mentioned the communication interface of passing through circuit board 11 behind the ground; Output to computer to data; Utilize the analysis of ground data process software, draw out the relation curve of the drilling fluid flow velocity and the degree of depth, thereby determine the position of drilling fluid leakage; Leakage place formation characteristics is surveyed the principle that adopts transient electromagnetic, and emitter 2 sends current pulse signal, and frequency adjustable; What the receiving coil 9 of down-hole received is the secondary field signal of transient electromagnetic through the stratum, and this signal is delivered to front end signal modulate circuit 15, accomplish preposition amplification and Filtering Processing after; Deliver to floating-point amplifying circuit 16; Amplifying signal is input in 16 analog-to-digital conversion (A/D) circuit 17, realizes that analog signal conversion becomes data signal, and data signal is input in the DSP circuit 19 that is connected with analog-to-digital conversion (A/D) circuit 17; In DSP, handle; Storage after the processing is in the memory circuitry 21 of DSP circuit 19, and the work schedule of analog-to-digital conversion (A/D) circuit 17 is to be provided by CPLD circuit 18, and power circuit 22 power supplies are provided by battery pack 8.After device is mentioned ground,, in computer, utilize transfer of data transient electromagnetic ground data process software to data analysis, thereby draw the formation characteristics at drilling fluid leakage place through the communication interface circuit on the transient electromagnetic circuit board for receiving 7 20.
Claims (5)
1. drilling fluid leak hunting device based on transient electromagnetic method; Reach the purpose of measuring drilling fluid leak position and leakage place formation characteristics; Leak-checking apparatus is made up of earth construction and underground structure two parts; It is characterized in that earth construction comprises the rectangular loop (1) that is layed in ground, the two ends of rectangular loop (1) link to each other with the pulse power output of emitter (2) respectively; Underground structure is transferred in the wellhole (3), comprises drilling rod (4), disposes transient electromagnetic on the drilling rod (4) and receives structure (5) and ultrasonic sensor measuring drilling fluid flow velocity structure (6);
Described transient electromagnetic receives structure (5) and comprises receiving coil (9) and outside guard member (10); The terminals of receiving coil (9) are connected with the terminals of transient electromagnetic circuit board for receiving (7) respectively, and first battery pack (8) is connected power supply with transient electromagnetic circuit board for receiving (7);
Described receiving coil (9) has one at least, and receiving coil (9) comprises three mutually perpendicular coils (9a, 9b, 9c).
2. a kind of drilling fluid leak hunting device based on transient electromagnetic method according to claim 1; It is characterized in that; First ultrasonic sensor (12) and second ultrasonic sensor (13) are installed on the described measuring drilling fluid flow velocity structure (6); Output signal end of first ultrasonic sensor (12) and second ultrasonic sensor (13) is connected on the drilling fluid flow velocity measuring circuit plate (11), and second battery pack (14) is connected power supply with drilling fluid flow velocity measuring circuit plate (11).
3. a kind of drilling fluid leak hunting device based on transient electromagnetic method according to claim 2; It is characterized in that; Described transient electromagnetic circuit board for receiving (7); The output that comprises the front end signal modulate circuit (15) that is connected with receiving coil (9), front end signal modulate circuit (15) is connected with the input of floating-point amplifying circuit (16), the input of output connection mode number conversion (A/D) circuit (17) of floating-point amplifying circuit (16); The input of the DSP circuit (19) that the output of analog-to-digital conversion (A/D) circuit (17) connects; The storage output of DSP circuit (19) is connected with memory circuit (21); CPLD circuit (18) is connected with analog-to-digital conversion (A/D) circuit (17), DSP circuit (19) and floating-point amplifying circuit (16), and DSP circuit (19) is connected with the serial communication interface of communication interface circuit (20), and the low supply voltage of power circuit (22) output is connected on the power pin of DSP circuit (19) and CPLD circuit (18).
4. a kind of drilling fluid leak hunting device based on transient electromagnetic method according to claim 3 is characterized in that, described first ultrasonic sensor (12) is coaxial and parallel with borehole axis with second ultrasonic sensor (13) center line.
5. a kind of drilling fluid leak hunting device based on transient electromagnetic method according to claim 1 is characterized in that, described rectangular loop (1) is the transmitting coil of transient electromagnetic, and insulate with the earth.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102365334A CN101446194B (en) | 2008-12-30 | 2008-12-30 | Drilling fluid leak hunting device based on transient electromagnetic method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102365334A CN101446194B (en) | 2008-12-30 | 2008-12-30 | Drilling fluid leak hunting device based on transient electromagnetic method |
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| CN101446194A CN101446194A (en) | 2009-06-03 |
| CN101446194B true CN101446194B (en) | 2012-07-04 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10844689B1 (en) * | 2019-12-19 | 2020-11-24 | Saudi Arabian Oil Company | Downhole ultrasonic actuator system for mitigating lost circulation |
| CN102966349A (en) * | 2012-11-28 | 2013-03-13 | 褚万泉 | System and method for monitoring cross-hole electromagnetic transient |
| CN106094043A (en) * | 2014-06-11 | 2016-11-09 | 中煤科工集团西安研究院有限公司 | Transient electromagnetic method ground hole detection method and device |
| CN109944582B (en) * | 2018-12-29 | 2022-08-19 | 贵州省地质矿产勘查开发局一一五地质大队 | Method for analyzing position of stratum containing fractures in shaft |
| CN113093292A (en) * | 2021-04-09 | 2021-07-09 | 中国矿业大学 | Method for grouting coal seam roof through ground-hole transient electromagnetic monitoring |
Citations (4)
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| CN1033533A (en) * | 1987-12-15 | 1989-06-28 | 北京航空学院 | Load modulation telemetry and device |
| CN2760228Y (en) * | 2004-08-20 | 2006-02-22 | 西安石油大学 | A leak hunting apparatus for drilling fluid |
| CN101065555A (en) * | 2004-11-26 | 2007-10-31 | 普拉德研究及发展公司 | Methods and apparatus for communicating across casing |
| CN101086202A (en) * | 2007-07-16 | 2007-12-12 | 安东石油技术（集团）有限公司 | On-service petroleum drill pipe detection and classification evaluation method |
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2008
- 2008-12-30 CN CN2008102365334A patent/CN101446194B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1033533A (en) * | 1987-12-15 | 1989-06-28 | 北京航空学院 | Load modulation telemetry and device |
| CN2760228Y (en) * | 2004-08-20 | 2006-02-22 | 西安石油大学 | A leak hunting apparatus for drilling fluid |
| CN101065555A (en) * | 2004-11-26 | 2007-10-31 | 普拉德研究及发展公司 | Methods and apparatus for communicating across casing |
| CN101086202A (en) * | 2007-07-16 | 2007-12-12 | 安东石油技术（集团）有限公司 | On-service petroleum drill pipe detection and classification evaluation method |
Non-Patent Citations (1)
| Title |
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| 齐文秀等.附录B地-井瞬变电磁方法.《地面瞬变电磁法技术规程》.1997, * |
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