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A method and system for inversion of shale gas reservoir resistivity

A shale gas and resistivity technology, applied in the field of inversion of shale gas reservoir resistivity, can solve problems such as poor reliability, achieve the effect of improving precision and accuracy, and avoiding multi-solution

Active Publication Date: 2018-07-13
CENT SOUTH UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the problem of poor reliability of existing shale gas reservoir exploration methods

Method used

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  • A method and system for inversion of shale gas reservoir resistivity
  • A method and system for inversion of shale gas reservoir resistivity
  • A method and system for inversion of shale gas reservoir resistivity

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Embodiment Construction

[0044] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0045] figure 1 A schematic diagram showing a method for inverting the resistivity of a shale gas reservoir according to an embodiment of the present invention. Such as figure 1 As shown, the method includes:

[0046] S1: Obtain the apparent resistivity of the target area by using a wide-area electromagnetic method;

[0047] S2: collecting seismic data in the target area;

[0048] S3: Constraint inversion is performed on the apparent resistivity according to the seismic data to obtain the distribution variation law of the resistivity of the shale gas reservoir in the target area.

[0049] The method for inverting the resistivity of shale gas reservoirs in this embodiment adopts the method of delineating shale gas reservoirs in multiple dimensions, which avoids the multiple solutions caused by seismic or electromagnetic single inversion methods in the...

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Abstract

The invention relates to a method and a system for inverting shale gas reservoir resistivity. The method comprises the steps: acquiring apparent resistivity of a target area by adopting a wide field electromagnetic method; collecting earthquake data of the target area; performing constrained inversion on the apparent resistivity according to the earthquake data to obtain the variation pattern of the shale gas reservoir resistivity of the target area. According to the invention, the solution multiplicity caused by a single method like earthquake or electromagnetism used for performing inversion is avoided, and the precision and accuracy of the shale gas reservoir resistivity inversion are improved.

Description

technical field [0001] The invention relates to the field of geophysical exploration, in particular to a method and system for inverting the resistivity of shale gas reservoirs. Background technique [0002] Shale gas is an unconventional natural gas that occurs in organic-rich mud shale and its interlayers. It mainly exists in adsorption and free states. The main component is methane. It belongs to the same category as "coalbed methane" and "tight gas". . The formation and enrichment of shale gas has its own unique characteristics, and it is often distributed in thick and widely distributed shale source rock formations in the basin. [0003] In North America, seismic and drilling technologies are mainly used for shale gas exploration. At present, the marine shale gas exploration methods in my country are basically divided into seismic exploration and electromagnetic exploration, mainly based on seismic or electromagnetic single inversion interpretation, which is relatively...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 李帝铨何继善戴世坤蒋奇云
Owner CENT SOUTH UNIV
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