The Fluid Evolution of Ancient Carbonate Reservoirs in Sichuan Basin and Its Implication for Shale Gas Exploration
نویسندگان
چکیده
Sichuan Basin is the only successful basin for shale gas exploration in China. In addition to main Lower Silurian Longmaxi formation, lower Cambrian Qiongzhusi an important potential formation. However, it was once considered that difficult enrich because of its poor sealing conditions and hydrocarbon migration adjacent reservoirs. With increasing research on generation reservoir Formation recent years, has become target Basin. The enrichment oil closely related fluid activities. Limited by degree exploration, there little analysis activities Formation, from perspective fluid. generated rift could migrate laterally uplift area form a Dengying Formation. source rock are basically same. Therefore, this paper reconstructed history reservoirs based inclusion analysis. Then activity process studied, discussed. results show can be divided into three stages: 1) charging stage, 2) cracking stage 3) adjustment stage. first under normal pressure, second third stages developed overpressure with pressure coefficients 1.3 1.2, respectively. High coefficient indicator enrichment. Because always been supply last two indeed existed. As long as condition itself not particularly poor, “sweet points” would formed. thick Deyang-Anyue focus
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ژورنال
عنوان ژورنال: Frontiers in Earth Science
سال: 2021
ISSN: ['2296-6463']
DOI: https://doi.org/10.3389/feart.2021.733397