海洋地质前沿2017，Vol.33Issue(10)：22-31,10.DOI:10.16028/j.1009-2722.2017.10003
琼东南盆地陵水凹陷构造演化及其对深水大气田形成的控制作用
TECTONIC EVOLUTION AND ITS CONSTRAINTS ON THE FORMATION OF DEEPWATER GIANT GAS FIELD IN LINGSHUI SAG,QIONGDONGNAN BASIN
摘要
Abstract
Recently,a deepwater giant gas field has been discovered in the Lingshui sag of the Qiongdongnan basin.As the result,Cenozoic structures and their constraining effects on the formation of deepwater giant gas field has gained great attention from researchers.In this paper,well data and seismic data are applied to study the Cenozoic structural evolution of the sag and their controlling effects over the formation of deepwater giant gas field from viewpoints of sequence stratigraghy and structural analysis.Compared with previous studies,the coupling of structure evolution,tectonic mechanism,sedimentary infilling and natural gas accumulation are emphasized.It is revealed that the Cenozoic structure evolution of the sag consisted of stages of Paleocene-Eocene rifting,Oligocene depressing-rifting,Early Miocene rifting-depressing and Middle-Miocene to Quaternary depressing.Data suggests that:a.Oligocene depressing-rifting controlled the distribution of source rocks of marineterrestrial transitional facies and marine facies,and the depression from Middle-Miocene to Quaternary expanded the gas generation window.b.Oligocene depressing-rifting provided the opportunity for the formation of fan-delta reservoir,and the depression from Middle-Miocene to Pliocene caused the formation of confined and non-confined deepwater clastic reservoirs and reef carbonate reservoirs.c.Oligocene depressing-rifting later on provided the opportunities for the formation of various structural traps,such as the strike-slip-extention structures,fault-noses,fault-anticlines,and various lithological traps such as deepwater confined channel sandstone of gravity flow,non-confined basinal lithological traps and reef stratigraphic traps.d.overpressure in the stages of Oligocene depressing-rifting and Middle-Miocene depressing stages formed the new faults/fissures as the paths for migration.关键词
构造演化/构造变形/构造动力学/深水大气田/陵水凹陷Key words
structural evolution/structural deformation/tectonic geodynamics/deepwater giant gas field/Lingshui Sag/Qiongdongnan Basin分类
天文与地球科学引用本文复制引用
张迎朝,甘军,杨希冰,徐新德,朱继田,杨金海,杨璐,李兴..琼东南盆地陵水凹陷构造演化及其对深水大气田形成的控制作用[J].海洋地质前沿,2017,33(10):22-31,10.基金项目
国家“十三五”科技重大专项“琼东南盆地深水区大中型气田形成条件与勘探关键技术”(2016ZX05026-002) （2016ZX05026-002）
