CN1262847C - Network charging potential monitoring method - Google Patents
Network charging potential monitoring method Download PDFInfo
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- CN1262847C CN1262847C CN 03109632 CN03109632A CN1262847C CN 1262847 C CN1262847 C CN 1262847C CN 03109632 CN03109632 CN 03109632 CN 03109632 A CN03109632 A CN 03109632A CN 1262847 C CN1262847 C CN 1262847C
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Abstract
The present invention belongs to a method for geophysical exploration. Through supplying electricity to a well sleeve pipe, the dynamic variation of a subsurface fluid is monitored on the ground. The method is mainly applied to the development monitoring of oil-gas fields and coal-seam gas fields. A multi-component monitoring method is used for a technique for monitoring the dynamic charge potential of a network which is laid out and measured at one time, and potential gradients in different directions are obtained; a measuring process is displayed in a dynamic mode; a field data analyzing and evaluating measure is used, and data quality is ensured; multi-component positive and inverse modeling is used for obtaining a monitoring effect with high precision; spatial continuous sampling is carried out, and the interference of a short period and a long period is effectively inhibited.
Description
Relate to the field
The invention belongs to geophysical exploration method, be mainly used in the exploitation monitoring in oil gas field and gas field, coal seam, specifically, is network charging potential monitoring method.
Background technology
The situations such as distribution range, flow direction, dynamic change that in oil-gas field development exploitation and coal-seam gas pressure break, need to get clear underground fluid.At present, seismic technology in the geophysical method and potential monitoring have begun to be applied to this field.The former still is in the development, and is with high costs, effect and so on and so forth; The measured component of the latter's existing method is single, can not show dynamically that monitoring effect is not good.
Summary of the invention
The object of the present invention is to provide a kind of network charging potential monitoring method.
Network charging potential monitoring method adopts two transmitting electrodes to underground power supply.One of them transmitting electrode is the charging monitor well.Another transmitting electrode is apart from the cased well of monitor well certain distance or artificial earthing's point, and when this transmitting electrode was cased well, the distance of it and monitor well was the twice of monitor well well depth at least; When it was artificial earth point, the distance of it and monitor well was three times of monitor well well depth at least.By the monitor well electrode power supply, supply current is a periodic square wave, strength of current 50～100 peaces.Supply current forms field, long straight conductor source near monitor well, the sleeve pipe by monitor well flows to another transmitting electrode and forms loop.In monitor well arranged around Measurement Network, carry out dynamic monitoring.Measurement Network is by being that the concentric ring of the different radii at center is formed with the charging monitor well more than 3.Whenever be periphery and put at least 24 ground-electrodes, be i.e. " potential measuring probe ".Per two electrode M and N (Fig. 1) are called an eelctric dipole, can measure a potential value.Each probe joins end to end, and promptly goes up the N utmost point of the M utmost point of an eelctric dipole as next eelctric dipole.By can obtaining the current potential of different relatively basic points to the calculating of measured value, and ring is gone up tangential electric potential gradient and electric potential gradient radially.
At first measure the preceding background electric field numerical value of water filling during measurement.The variation of ground electric field after the dynamic monitoring water filling then.Because when injecting water and be conducting liquid such as salt solution, water filling will produce a new electric conductor underground.Therefore, by the background before the dynamic removal water filling, can obtain the current potential by new electric conductor generation of different relatively basic points, and encircle upward tangential electric potential gradient and radially three unusual parameters of electric potential gradient.By the FORWARD AND INVERSE PROBLEMS simulation of counter-rotating stack and a plurality of measurement component datas in ground, directly obtain the geometry parameter of underground fluid.
Description of drawings:
Fig. 1 a network charging potential monitoring method schematic top plan view
Fig. 1 b network charging potential monitoring method side-looking diagrammatic cross-section
Concrete enforcement
1: one transmitting electrode of embodiment is monitoring sleeve well A (Fig. 1), 500 meters of well depths.Supply current is the positive and negative square wave of periodicity, strength of current 50 peaces.Another transmitting electrode is put B (Fig. 1) for the artificial earthing apart from 1800 meters in monitoring sleeve well.In monitor well A arranged around Measurement Network.Measurement Network is that the concentric ring of the different radii at center is formed by 3 with monitor well A (Fig. 1).Every ring 24 ground-electrodes of equidistant symmetric arrangement (Fig. 1), each adjacent electrode M, N join end to end.
2: one transmitting electrodes of embodiment are the monitoring sleeve well, 500 meters of well depths.Supply current is the positive and negative square wave of periodicity, strength of current 90 peaces.Another transmitting electrode is the cased well apart from 1200 meters of monitor wells.In monitor well arranged around Measurement Network.Survey grid is that the concentric ring of the different radii at center is formed with the monitor well by 5.36 ground-electrodes of every ring symmetric arrangement, each adjacent electrode M, N join end to end.
Claims (4)
1. network charging potential monitoring method, it is characterized in that: adopt two transmitting electrodes to underground power supply, one of them transmitting electrode is the charging monitor well, another transmitting electrode is apart from the cased well of monitor well certain distance or artificial earthing's point, by the monitor well electrode power supply, supply current is a periodic square wave, and supply current intensity is 50～100 peaces, and electric current flows to another transmitting electrode formation loop by the sleeve pipe of monitor well; In monitor well arranged around Measurement Network, Measurement Network is by being that the concentric ring of center, different radii is formed with the charging monitor well more than 3, whenever be periphery and put at least 24 ground-electrodes, form an eelctric dipole by per two ground-electrodes (M), (N), (M) utmost point of an adjacent last eelctric dipole is as (N) utmost point of next eelctric dipole, and each ground-electrode (M, N) links to each other; At first measure the preceding background electric field numerical value of water filling, the variation of ground electric field after the dynamic monitoring water filling then, the FORWARD AND INVERSE PROBLEMS simulation of counter-rotating stack and a plurality of measurement component datas in ground obtains the current potential of different relatively basic points, and ring upward tangential electric potential gradient and electric potential gradient radially.
2. a kind of network charging potential monitoring method as claimed in claim 1 is characterized in that: when described another transmitting electrode was cased well, the distance of it and monitor well was the twice of monitor well well depth at least; When it was artificial earth point, the distance of it and monitor well was three times of monitor well well depth at least.
3. a kind of network charging potential monitoring method as claimed in claim 1 or 2, it is characterized in that: a transmitting electrode is monitoring sleeve well (A), supply current is the positive and negative square wave of periodicity, strength of current 50 peaces, another transmitting electrode is the artificial earthing's point (B) apart from 1800 meters in monitoring sleeve well when well depth is 500 meters, Measurement Network is that the concentric ring of the different radii at center is formed by 3 with monitoring sleeve well (A), 24 ground-electrodes of the equidistant symmetric arrangement of every ring, each adjacent electrode (M, N) joins end to end.
4. a kind of network charging potential monitoring method of stating as claim 1 or 2, it is characterized in that: a transmitting electrode is the monitoring sleeve well, supply current is the positive and negative square wave of periodicity, strength of current 90 peaces, another transmitting electrode is the cased well apart from 1200 meters of monitor wells when well depth is 500 meters, Measurement Network is that the concentric ring of the different radii at center is formed with the monitor well by 5,36 ground-electrodes of every ring symmetric arrangement, and each adjacent electrode (M, N) joins end to end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03109632 CN1262847C (en) | 2003-04-10 | 2003-04-10 | Network charging potential monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03109632 CN1262847C (en) | 2003-04-10 | 2003-04-10 | Network charging potential monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1536373A CN1536373A (en) | 2004-10-13 |
| CN1262847C true CN1262847C (en) | 2006-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03109632 Expired - Fee Related CN1262847C (en) | 2003-04-10 | 2003-04-10 | Network charging potential monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1262847C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7496488B2 (en) * | 2003-03-06 | 2009-02-24 | Schlumberger Technology Company | Multi-scale finite-volume method for use in subsurface flow simulation |
| CN102466822B (en) * | 2010-11-04 | 2013-09-04 | 中国石油天然气集团公司 | Ocean electromagnetic surveying four-pole mutual combination pole distribution method |
| CN105781520A (en) * | 2014-12-22 | 2016-07-20 | 中国石油天然气股份有限公司 | Ground surface blowout detecting method |
| CN105373673B (en) * | 2015-12-02 | 2018-08-03 | 中南大学 | A kind of natural electric field monitoring data dynamic playback method and system |
| CN105840185B (en) * | 2016-03-30 | 2019-02-05 | 大港油田集团有限责任公司 | A kind of consistent electric field fractured horizontal well Crack Monitoring method |
| CN106154337A (en) * | 2016-08-30 | 2016-11-23 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of vertical induced polarization device detecting shale formation and detection method |
| CN113221411B (en) * | 2021-05-08 | 2022-12-09 | 桂林理工大学 | Charging potential numerical simulation method, system and terminal for lossy medium with any shape |
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2003
- 2003-04-10 CN CN 03109632 patent/CN1262847C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1536373A (en) | 2004-10-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ASS | Succession or assignment of patent right |
Owner name: DONGFANG GEOPHYSICAL EXPLORATION CO., LTD., SINOP Effective date: 20040806 Owner name: CHINA NATIONAL PETROLEUM CORP. Free format text: FORMER OWNER: DONGFANG GEOPHYSICAL EXPLORATION CO., LTD., SINOPEC |
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| C06 | Publication | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| PB01 | Publication | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20040806 Address after: Shop No. six, pit 6, Xicheng District, Beijing Applicant after: China National Petroleum Corporation Co-applicant after: Dongfang Geophysical Exploration Co., Ltd., China Petrochemical Corp. Address before: Zhuozhou city of Hebei Province Applicant before: Dongfang Geophysical Exploration Co., Ltd., China Petrochemical Corp. |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060705 Termination date: 20210410 |