Electromagnetic ground lens detection method and device

A detection method and technology for detection devices, which are applied in measurement devices, electrical/magnetic detection for logging records, and electrical/magnetic exploration, etc., can solve problems such as undeveloped research.

Active Publication Date: 2018-12-14
HANGZHOU SUMAY TECH
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In recent years, some well-known oil companies and universities in the world have carried out relev

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  • Electromagnetic ground lens detection method and device
  • Electromagnetic ground lens detection method and device
  • Electromagnetic ground lens detection method and device

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Embodiment Construction

[0039] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below and described in detail in conjunction with the accompanying drawings.

[0040] Such as figure 1 Shown is the schematic diagram of the electromagnetic earth lens detection device embodiment of the present invention, comprises:

[0041] The electromagnetic excitation source is used to excite the secondary induced electromagnetic field of underground formations or electrical anomalies by applying low-frequency alternating current. It specifically includes a current injection device 1 and a metal sleeve 2. The current injection device 1 is used to generate and inject an excitation current to the metal sleeve 2. One end of the metal sleeve 2 is connected to the current injection device 1 to receive the excitation current, and the other end is used as an excitation source 3. , located in the downhole formation 11 and poin...

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Abstract

The present invention relates to an electromagnetic ground lens detection method and device used for detection of downhole electricity anomalous body. The device comprises: an electromagnetic excitation source applying a low-frequency current as an excitation source, by employing borehole casing pipe, used to excite electricity anomalous body secondary inductive electromagnetic field; and electromagnetic data collection probes, wherein the array electromagnetic data collection probes with a certain quantity are arranged on the ground to obtain a three-component electric field and a magnetic field data used for downhole electricity anomalous body and fining description. The electricity anomalous body lens imaging device and method employ a physical geography inversion method to perform inversion imaging processing of the obtained electromagnetic response data through collection to obtain conductivity parameters and geometrical parameters of the downhole electricity anomalous body through inversion. The electricity anomalous body lens imaging device and method can achieve effective identification and fining lens imaging of the downhole electricity anomalous body based on the electromagnetic theory.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to an electromagnetic earth lens detection method and a detection device. Background technique [0002] In 2017, my country's dependence on foreign oil reached 67.4%. In order to improve the ability to guarantee oil and gas resources, my country has implemented two strategic measures in the field of oil and gas exploration and development in recent years: one is to stabilize and increase production in old oil fields, and the other is to vigorously develop unconventional oil and gas. For mature oilfields with stable and increasing production, water flooding is still the main method; for unconventional oil and gas reservoirs such as low porosity and low permeability, tight sandstone and shale, hydraulic fracturing has become the main technology for their effective development. The monitoring and evaluation of water flooding and fracturing effects is of great significanc...

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Application Information

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IPC IPC(8): G01V3/26G01V3/38
CPCG01V3/26G01V3/38
Inventor 张中庆柳杰
Owner HANGZHOU SUMAY TECH
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