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Method and device for determining content of adsorbed gas in clay shale reservoir

A technology for adsorbing gas and shale, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as poor accuracy, and achieve high accuracy and wide applicability

Inactive Publication Date: 2015-12-23
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of poor accuracy of the existing quantitative prediction results of shale gas gas content, the present invention further proposes a method and device for determining the adsorbed gas content in mud shale reservoirs, specifically including the following technical solutions :

Method used

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  • Method and device for determining content of adsorbed gas in clay shale reservoir
  • Method and device for determining content of adsorbed gas in clay shale reservoir
  • Method and device for determining content of adsorbed gas in clay shale reservoir

Examples

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Embodiment 1

[0056] In this example, a shale reservoir of Yanchang Formation in a basin is used as the implementation object to illustrate the method of determining the content of adsorbed gas in the shale reservoir. The total area of ​​the basin is about 25×104km. 2 , Structurally, it is a large syncline with a north-south trending west flank and a steep east flank. According to the current structural morphology, basement characteristics and sedimentary construction, the basin can be divided into six first-level structural units. The sedimentary evolution of the Yanchang Formation in the basin has experienced an initial depression period, a strong depression period, a depression shrinking period, a short expansion period, a shrinking again period, and a lake basin extinction period. The Chang 9 period was in the early initial depression period of the Late Triassic lake basin, and the Chang 9 member shale was formed in a stable regional distribution; the Chang 7 member was in the strong depre...

Embodiment 2

[0099] This embodiment provides a device for determining the content of adsorbed gas in a shale reservoir, which combines Figure 13 Shown, including:

[0100] The parameter acquisition unit 31 is used to acquire the influencing factors of the adsorbed gas of the shale reservoir to be tested. The influencing factors of the adsorbed gas include organic geochemical characteristic parameters, mineral composition parameters, physical property parameters and external parameters;

[0101] The adsorbed gas content determination unit 32 is used to obtain the measured adsorbed gas content of the shale reservoir to be tested according to the physical property parameters and the isotherm adsorption experimental data of the shale reservoir to be tested, and through a predetermined adsorption model;

[0102] The scatter diagram determining unit 33 is used to determine the scatter diagram of the change of the measured adsorbed gas content with the adsorbed gas influencing factors according to the ...

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Abstract

The invention provides a method and a device for determining the content of adsorbed gas in a clay shale reservoir and belongs to the technical field of prediction of gas content of the clay shale reservoir. The method comprises steps as follows: influence factors of the adsorbed gas in the clay shale reservoir are obtained; the actually measured adsorbed gas content is acquired through a preset adsorption model according to physical property parameters and isothermal adsorption experimental data of a to-be-measured clay shale reservoir; a scatter diagram indicating that the actually measured adsorbed gas content changes along with the adsorbed gas influence factors is determined according to the adsorbed gas influence factors and the actually measured adsorbed gas content; the scatter diagram is subjected to fitting, a correlation curve and the fitting degree of the adsorbed gas content changing along with the predetermined influence factors are acquired, and the influence factors with the fitting degree larger than a preset value are determined as main controlling factors of the adsorbed gas content; a multiple linear regression model is established according to the main controlling factors of the adsorbed gas content; an adsorbed gas content model is determined through the multiple linear regression model according to the adsorbed gas influence factors and the actually measured adsorbed gas content. The method and the device have the characteristic of higher accuracy of a quantitative prediction result.

Description

Technical field [0001] The invention relates to a method and a device for determining the content of adsorbed gas in a shale reservoir, belonging to the technical field of gas content prediction in a shale reservoir. Background technique [0002] Shale gas is a new type of natural gas resource, but there are still difficulties in how to determine the gas content of shale gas in the reservoir. Among them, how to effectively obtain gas content data, how to select suitable methods and parameters for shale gas gas content calculation, and how to make accurate predictions and evaluations of shale gas content are still important contents of shale gas research. [0003] For the quantitative prediction of shale gas content, single-factor correlation analysis and principal component analysis are currently used to determine the main controlling factors that affect the gas content. On this basis, the relationship between the gas content and the main controlling factors is established. Quanti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 姜福杰王志芳徐梓洋陈健
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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