Characteristics of Karst Formations and Their Significance for Shale Gas Exploration

نویسندگان

چکیده

The classification method of karst formations is widely used in engineering and environmental geology but seldom petroleum geology. In this study, the applied to sealing study shale gas roof floor carbonate rocks, influence on accumulation drilling discussed. Paleozoic black southern China primarily formed by marine transitional faces, intergrowth between rocks a basic geological feature strata China. Carbonate an unavoidable problem exploration Around target layer, Upper trait region, starts from development strength strata, through profile survey, spring flow statistics, test, other methods means; rock contacted with it are taken as whole explore impact drilling. area were divided into two kinds, four types, six subtypes. It was determined that limestone continuous Sidazhai Formation second member Nandan sensitive layers drilling, whereas first number Wuzhishan reservoir-forming packers. addition, for evaluating sensitivity summarized. avoidance, karst-sensitive, karst-insensitive areas divided. Combined surface underground conditions not being significantly different, should avoid fold core fault zones.

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ژورنال

عنوان ژورنال: Frontiers in Earth Science

سال: 2022

ISSN: ['2296-6463']

DOI: https://doi.org/10.3389/feart.2022.907685