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A 3d basin modeling study of the factors controlling gas hydrate accumulation in the Shenhu Area of the South China Sea

引用

China Geology 2022年第2期5卷 218-233页

作者： Zhi-yuan Xie Jian-gong Wei Jin-yun Zheng Zhen Sun Kun Zhang Guangzhou Marine Geological Survey China Geological SurveyMinistry of Natural ResourcesGuangzhou 510760China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Sanya Institute of South China Sea Geology Guangzhou Marine Geological SurveySanya 572025China China National Offshore Oil Corporation Ltd.-Shenzhen Shenzhen 518054China Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China State Key Laboratory of Marine Geology School of Ocean and Earth ScienceTongji UniversityShanghai 200092China

Great advancement has been made on natural gas hydrates exploration and test production in the northern South China ***,there remains a lot of key questions yet to be resolved,particularly about the mechanisms and the controls of gas hydrates *** simulaution would play signficant role in addressing these *** study focused on the gas hydrate exploration in the Shenhu Area,Northern South China *** on the newly obtained borehole and multichannel reflection seismic data,the authors conducted an integrated 3d basin modeling study on gas *** results indicate that the Shenhu Area has favorable conditions for gas hydrate accumulation,such as temperature,pressure,hydrocarbon source,and tectonic *** hydrates are most concentrated in the Late Miocene strata,particularly in the structual highs between the Baiyun Sag and the Liwan Sag,and area to the south of *** also proved the existence of overpressure in the main sag of source rocks,which was subject to compaction disequilibrium and hydrocarbon *** also shown that the regional fault activity is not conducive to gas hydrate accumulation due to excess gas *** authors conjecture that fault activity may slightly weaken overpressure for the positive effect of hydrocarbon expulsion and areas lacking regional fault activity have better potential.

关键词： 3d basin modeling Gas hydrates Fault reactivation Overpressure Gas seepage Heat flow NGHs exploration trial engineering Oil and gas exploration engineering Shenhu Area South China Sea

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