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Shale gas development main control factor analysis method based on decision tree

A technology of main control factors and analysis methods, applied in earthwork drilling, special data processing applications, wellbore/well components, etc., can solve problems affecting the accuracy of the analysis results of main control factors, improve accuracy and improve accuracy sexual effect

Pending Publication Date: 2021-07-23
PETROCHINA CO LTD
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  • Application Information

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Problems solved by technology

[0004] However, for complex problems, the numerical simulation model may not take into account all physical processes and introduce model errors, which will affect the accuracy of the analysis results of the main controlling factors

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  • Shale gas development main control factor analysis method based on decision tree
  • Shale gas development main control factor analysis method based on decision tree
  • Shale gas development main control factor analysis method based on decision tree

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Embodiment Construction

[0039] All features disclosed in all embodiments in this specification, or steps in all implicitly disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined and / or extended and replaced in any way.

[0040] Such as figure 1 , as shown in 2, the analysis method of main controlling factors of shale gas development based on decision tree, including steps:

[0041] S1, obtain the shale gas development data set;

[0042] S2, based on the acquired shale gas development data set, establish a decision tree model;

[0043] S3, train the decision tree model;

[0044] S4, based on the trained decision tree model, calculate feature importance;

[0045] S5, judging the main controlling factors according to the feature importance analysis.

[0046] In this example, data set D contains the data of 146 wells, in which the geological and engineering parameters include: length of Wufeng formation, length of sublayer 1, length of sublayer 2, distanc...

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Abstract

The invention discloses a shale gas development main control factor analysis method based on a decision tree. The shale gas development main control factor analysis method comprises the following steps of S1, acquiring a shale gas development data set; S2, establishing a decision tree model based on the obtained shale gas development data set; S3, training the decision tree model; S4, calculating feature importance based on the trained decision tree model; and S5, analyzing and judging main control factors and the like according to the feature importance. According to the shale gas development main control factor analysis method, many problems based on a numerical simulation method can be avoided, and the accuracy and the like of judging the main control factors of shale gas development is effectively improved.

Description

technical field [0001] The invention relates to the technical field of unconventional oil and gas reservoir exploitation, and more specifically, relates to a decision tree-based analysis method for main controlling factors of shale gas development. Background technique [0002] Due to the extremely low permeability, the development of shale gas generally requires horizontal drilling and multi-stage fracturing techniques. The development effect of horizontal wells generally depends on geological static parameters (such as porosity, TOC, brittle mineral content, and gas content, etc.) , the amount of sand added, displacement and pump stop pressure, etc.) combined effects. In actual development, it may often be encountered that the production of horizontal wells on different platforms varies greatly, and sometimes horizontal wells on the same platform may have completely different production characteristics. In order to explain these phenomena, we need to study which paramete...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00G06F30/20
CPCE21B49/00G06F30/20
Inventor 陈娟曾波黄浩勇宋毅杨蕾岳文翰常海滨黎俊峰
Owner PETROCHINA CO LTD