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Method of determining shale gas content and apparatus thereof

A shale gas content and gas content technology, applied in the field of geological exploration, can solve problems such as guiding production, low accuracy of gas content, and no solution proposed, and achieve the effect of improving accuracy

Active Publication Date: 2016-12-21
PETROCHINA CO LTD
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Problems solved by technology

[0003] As an adsorbed shale gas that is significantly different from conventional natural gas, the current models for predicting the adsorbed gas content of shale mainly include: Langmuir adsorption model, DR adsorption model, DA adsorption model, BET adsorption model, etc. However, these models are only qualitative Prediction of shale gas content, resulting in low accuracy of predicted gas content, making it difficult to guide actual production
[0004] For the above problems, no effective solution has been proposed

Method used

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  • Method of determining shale gas content and apparatus thereof
  • Method of determining shale gas content and apparatus thereof
  • Method of determining shale gas content and apparatus thereof

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0039] The inventor considers that for shale reservoirs, there are not only adsorbed gas but also free gas. Therefore, if you want to obtain a more accurate gas content, you need to calculate not only the adsorbed gas content, but also the free gas content. For this, in In this example, a method for determining the gas content of shale is provided, such as figure 1 As shown, the method includes:

[0040] Step 101: Determine the first main controlling factor of the shale adsorbed gas content in the current work area;

[0041] In the process of determining the first main controlling factor, the...

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Abstract

The invention provides a method of determining a shale gas content and an apparatus thereof. The method comprises the following steps of determining a first master control factor of a current work area shale adsorption gas content; acquiring a second master control factor of a shale free gas content; based on the first master control factor, establishing a current work area shale adsorption gas content prediction formula; based on the second master control factor, establishing a current work area shale free gas content prediction formula; and according to the shale adsorption gas content prediction formula and the shale free gas content prediction formula, determining a current work area gas content. In an embodiment of the invention, a technical problem that the shale gas content is only qualitatively predicted so that accuracy of a predicted gas content is not high in the prior art is solved, and a technical effect of effectively increasing accuracy of a prediction result of the shale gas content is reached.

Description

technical field [0001] The invention relates to the technical field of geological exploration, in particular to a method and a device for determining the gas content of shale. Background technique [0002] As a new type of unconventional natural gas energy, shale gas has been paid more and more attention to its exploration and development. The occurrence forms of shale gas include: free state, adsorbed state, dissolved state and solid solution state, and the free state and adsorbed state are the main forms. Therefore, predicting the content of free gas and adsorbed gas is of great significance for evaluating the resource potential of shale gas. [0003] As an adsorbed shale gas that is significantly different from conventional natural gas, the current models for predicting the adsorbed gas content of shale mainly include: Langmuir adsorption model, DR adsorption model, DA adsorption model, BET adsorption model, etc. However, these models are only qualitative Predicting the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/02
Inventor 李鹏郑民毕赫
Owner PETROCHINA CO LTD
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