Network charging potential monitoring method

A potential monitoring and network technology, applied in the field of geophysical exploration, can solve the problems of single component, no dynamic display, and different application effects.

Inactive Publication Date: 2004-10-13
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The former is still in development, the cost is high, and the application effect varies; the latter's existing method measures a single component, which cannot be dynamically displayed, and the monitoring effect is not good

Method used

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  • Network charging potential monitoring method

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Experimental program
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Effect test

Embodiment 1

[0009] Embodiment 1: One power supply electrode is the monitoring cased well A (Fig. 1), and the well depth is 500 meters. The power supply current is a periodic positive and negative square wave with a current intensity of 50A. Another power supply electrode is the artificial grounding point B (Fig. 1) 1800 meters away from the monitoring cased well. A measurement network is arranged around the monitoring well A. The measurement network is composed of three concentric rings with different radii centered on the monitoring well A (Fig. 1). 24 grounding electrodes are symmetrically arranged at equal distances in each ring (Fig. 1), and the adjacent electrodes M and N are connected end to end.

Embodiment 2

[0010] Embodiment 2: A power supply electrode is a monitoring cased well with a depth of 500 meters. The supply current is a periodic positive and negative square wave with a current intensity of 90A. The other power supply electrode is a cased well 1200 meters away from the monitoring well. A measurement network is deployed around the monitoring wells. The measurement network is composed of 5 concentric rings with different radii centered on the monitoring well. 36 grounding electrodes are symmetrically arranged in each ring, and the adjacent electrodes M and N are connected end to end.

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Abstract

The invention belongs to a geophysical prospecting method, by electrifying well sleeve, monitoring the dynamic change of underground fluid on the ground, and mainly applied to development and monitoring of oil gas field and coal bed gas field. The network dynamic charging potential monitoring technique adopts multi-component monitoring method, to primarily arrange and measure the network to obtain the potential gradients in different directions; dynamically displays the measuring course; has field data analyzing and evaluating means, to protect data quality; uses multi-component forward and inverse simulation to obtain high-precision monitoring effect; continuously makes space sampling; effectively suppresses the interference of short and long periods.

Description

[0001] Involved areas [0002] The invention belongs to geophysical prospecting methods, and is mainly applied to the development monitoring of oil and gas fields and coal seam gas fields, in particular, it is a network charging potential monitoring method. Background technique [0003] In the development and production of oil and gas fields and coalbed gas fracturing, it is necessary to understand the distribution range, flow direction, and dynamic changes of underground fluids. Currently, seismic techniques and potential monitoring in geophysical methods have begun to be applied in this field. The former is still in development, the cost is high, and the application effect varies; the latter's existing method measures a single component, which cannot be dynamically displayed, and the monitoring effect is not good. Contents of the invention [0004] The purpose of the present invention is to provide a network charging potential monitoring method. [0005] The network char...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/20
Inventor 何展翔
Owner BC P INC CHINA NAT PETROLEUM CORP
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