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Study on the distribution characteristics of faults and their control over petroliferous basins in the China seas and its adjacent areas

引用

Acta Oceanologica Sinica 2023年第3期42卷 227-242页

作者： Xin’gang Luo Wanyin Wang Ying Chen Zhizhao Bai Dingding Wang Tao He Yimi Zhang Ruiyun Ma Institute of Gravity and Magnetic Technology Key Laboratory of Western China’s Mineral Resources and Geological Engineering of Ministry of EducationSchool of Geology Engineering and GeomaticsChang’an UniversityXi’an 710054China National Engineering Research Center of Offshore Oil and Gas Exploration Beijing 100028China Key Laboratory of Marine Geology and Environment Chinese Academy of SciencesQingdao 266071China China National Offshore Oil Corporation(CNOOC)Research Institute Co. Ltd.Beijing 100028China Department of Earth Sciences Memorial University of NewfoundlandSt.John’sNewfoundland A1B3X5Canada

As one of the main controlling factors of oil and gas accumulation,faults are closely related to the distribution of oil and gas *** how faults control petroliferous basins is particularly *** this work,we investigated the plane positions of major faults in the China seas and its adjacent areas using the normalized vertical derivative of the total horizontal derivative(NVDR-THDR)of the Bouguer gravity anomaly,the fusion results of gravity and magnetic anomalies,and the residual Bouguer gravity *** apparent depths of major faults in the China seas and its adjacent areas were inverted using the Tilt-Euler method based on the Bouguer gravity *** results show that the strikes of the faults in the China seas and its adjacent areas are mainly NE and NW,followed by EW,and *** them,the lengths of most ultra-crustal faults are in the range of 1000–3000 km,and their apparent depths lie between 10 km and 40 *** lengths of crustal faults lie between 300 km and 1000 km,and their apparent depths are between 0 km and 20 *** to the plane positions and apparent depths of the faults,we put forward the concept of fault influence factor for the first *** on this factor,the key areas for oil and gas exploration were found as follows:the east of South North China Basin in the intracontinental rift basins;the southeast region of East China Sea Shelf Basin,the Taixinan and Qiongdongnan basins in the continental margin rift basins;Zhongjiannan Basin in the strike-slip pull-apart basins;the Liyue,Beikang,and the Nanweixi basins in the rifted continental *** work provides valuable insights into oil and gas exploration,mineral resource exploration,and deep geological structure research in the China seas and its adjacent areas.

关键词： China seas gravity and magnetic anomalies plane positions of faults apparent depths of faults oil and gas basins

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