摘要
南黄海盆地是中国近海至今尚未获得油气重大突破的(古生界—中生界—新生界)叠合盆地之一,受对冲挤压性质的印支运动影响,南黄海盆地南部坳陷区域已沉积的古生界及下中生界发生构造形变及抬升剥蚀,形成了不同程度、不同规模、不同走向的逆冲推覆断层及相应的挤压背斜构造。针对南黄海盆地中—古生界与新生界构造叠加特征问题,运用地震剖面结构分析方法,将区域与局部地震剖面结构分析相结合,通过区域断裂特征解释确定断裂体系发育特征,并结合不同层系地层变形特征,综合确定不同构造层系的结构特征。研究结果表明,在早期挤压时期,南部坳陷位于南北对冲挤压弱变形带,主要发育相对完整的挤压背斜构造,在晚期拉张时期,南部坳陷在早期挤压变形的基底之上,发育了近东西走向的系列断陷。最终形成早期挤压构造与晚期拉张断裂构造叠合发育区带为研究区油气勘探突破有利区带的新认识。
The South Yellow Sea Basin is considered as one of the superimposed(Paleozoic-Mesozoic-Cenozoic)basins in the offshore of China without major hydrocarbon exploration breakthrough.The Indosinian movement with squeezing effect leads to the tectonic deformation and uplifting erosion of the Paleozoic and Lower Mesozoic strata in the southern depression of the South Yellow Sea Basin.It finally results in the thrust nappe faults with various levels,scales and strikes and the corresponding extrusion anticline structures.Regional and local seismic section structure analysis was combined and used to characterize the superposition between the Mesozoic-Paleozoic and Cenozoic structures in the South Yellow Sea Basin.The fault system development was characterized through the interpretation of regional fault properties.The structure properties were characterized through combining with the deformation patterns of different stratigraphic strata.Result indicates that the southern depression was locates in the north-south thrust extrusion zone with weak deformation in the early extrusion period,which mainly leads to the development of relatively complete extrusion anticline structures.In the late tensile stage,a series of fault-depressions were created on the base of the early extrusion deformation in the southern depression.The superposition zone with early extrusion structure and late tensile fault structure is a new understanding of the hydrocarbon exploration breakthrough in this area.
作者
黄建军
牛华伟
Huang Jianjun;Niu Huawei(Sinopec Shanghai Offshore Petroleum Company,Shanghai 200120,China)
出处
《特种油气藏》
CAS
CSCD
北大核心
2019年第4期15-20,共6页
Special Oil & Gas Reservoirs
基金
中石化科技攻关专项“南黄海盆地油气资源评价与勘探潜力分析”(P15102)
关键词
对冲挤压
拉张断陷
南部坳陷
南黄海盆地
hedging extrusion
tensile fault-depression
southern depression
South Yellow Sea Basin
作者简介
黄建军(1979—),男,高级工程师,2003年毕业于石油大学(华东)资源勘察工程专业;2008年毕业于同济大学海洋地质专业,获博士学位,现从事海域油气地质综合研究工作。
