Normal-pressure shale gas enrichment and high production target optimization method based on three-factor gas control

Abstract

The invention discloses a normal-pressure shale gas enrichment and high production target optimization method based on three-factor gas control. The normal-pressure shale gas enrichment and high production target optimization method comprises the following steps that (1) on the basis of single well dissection of a normal-pressure shale gas well and analysis of target enrichment and high production laws, the three main control factors affecting normal-pressure shale gas enrichment and high production are determined; (2) by taking the normal-pressure shale gas enrichment and high production main control factors as a main line, parameters highly related with the main control factors are optimized as analysis parameters; (3) different weights are given to the analysis parameters, and a normal-pressure shale gas enrichment and high production target optimization parameter list is established; and (4) an analysis target is subjected to quantitative classification analysis according to a target comprehensive evaluation value, and thus optimization of an exploitable area and well position deployment are guided. The normal-pressure shale gas enrichment and high production target optimization method has the beneficial effects that normal-pressure shale gas exploration of the Wufeng formation and the Long maxi formation in a southeast Chongqing district is guided effectively, and the exploration success rate is increased.

Description

technical field [0001] The invention belongs to the technical field of shale gas exploration and analysis, and in particular relates to an enrichment and high-yield target optimization method for atmospheric shale gas based on three-factor gas control. Background technique [0002] In recent years, on the basis of in-depth summarization of successful experience in shale gas exploration and development at home and abroad, scholars from all sides have carried out a large number of studies on shale gas selection analysis and enrichment law (Huang Jinliang et al., 2012; Wang Shiqian et al., 2013; Guo Xiuying et al., 2015; Zhang Jian et al., 2016; Liu Honglin et al., 2016; Guo Tonglou, 2016; He Zhiliang et al., 2017), and gradually formed a characteristic theoretical system of shale gas exploration and development. Under the guidance of theory, large-scale shale gas fields such as Jiaoshiba, Weiyuan, Weirong, Changning, and Zhaotong were discovered and built. The formation pressu...

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Problems solved by technology

At present, there are relatively few research works on area selection analysis and enrichment law of normal-pressure shale gas. The early enrichment and high-yield law and target selection method for overpressure shale gas formation are obviously not applicable to normal-pressure shale gas. Optimizing favorable targets in the normal-pressure area, achieving breakthroughs in exploration and building production, has become a difficult problem for the shale gas industry

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