西南石油大学学报（自然科学版）2011，Vol.33Issue(3)：41-46,6.DOI:10.3863/j.issn.1674-5086.2011.03.006
乌石凹陷构造特征及其对油气成藏的影响
Structural Features and Impacts on Hydrocarbon Accumulation in Wushi Sag
摘要
Abstract
Wushi Sag is a half graben controlled by two master faults-fault 7 and fault 6. Fault 7 dominateseastern depression with character of south dropping and north onlap. Fault 6 dominates western depression with character of north dropping and south onlap. There is a transfer zone between eastern and western depression, which accommodates hypsographic feature of two depressions. Wushi sag develops two types of overlying structure style: extension style and inversion style. Extension style is composed of the extension in Palaeocene, strong extension in Eocene, and feeble extension in Oligocene in the form of half-graben, complex half-graben, graben-horst, forward step-fault, and backward step-fault, which all are dominated by the association normal faults. Inversion style mainly occurs in center inversion zone, and it's characteristics of east and west of center inversion zone are different. Source rock distribution, trap forming, and hydrocarbon accumulation are controlled by the tectonic activity. More hydrocarbon reservoirs found by now, which are from allochthonous source than from authigenic source, have a close relationship with the impacts of fault activity.关键词
控凹断裂；伸展构造样式；反转构造样式；油气藏；断裂活动；北部湾盆地Key words
master fault/ extension style/ inversion style/ hydrocarbon reservoir/ fault activity/ Beibuwan Basin SEISMIC STRATA COMPARISION OF THE COMPLEXED RIFTED BASIN OF HAILAR- TAMUCAGE分类
能源科技引用本文复制引用
杨海长,梁建设,胡望水..乌石凹陷构造特征及其对油气成藏的影响[J].西南石油大学学报（自然科学版）,2011,33(3):41-46,6.基金项目
国家科技重大专项课题“近海富烃凹陷资源潜力再评价和新区、新领域勘探方向”(2008ZX05023-001). （2008ZX05023-001）
