海洋地质前沿2024，Vol.40Issue(3)：22-30,9.DOI:10.16028/j.1009-2722.2023.023
埕北凹陷沙河街组构造-沉积响应特征与油气勘探意义
Tectonic-sedimentary features of the Shahejie Formation in Chengbei Sag and its implications for oil and gas exploration
摘要
Abstract
Based on three-dimensional seismic,core,logging,and logging data,guided by the"source-valley-sink"concept,the evolution of the structural fault system in the Shahejie Formation and its sedimentary response characteristics in the Chengbei Sag were analyzed.The development types and spatiotemporal distribution of sedi-mentary systems in different stages of structural evolution were clarified.Results show that the sedimentation of the Shahejie Formation was controlled by the Chengbei Fault and Chengzikou Fault,reflecting typical episodic structural evolution characteristics.The sedimentation period of the third member of the Shahejie Formation is characterized by strong faulting and subsidence,during which the activity of the Chengbei Fault was strong.A fan delta sedimentary system was developed in steep slope zone along a large ancient valley,while a delta sediment-ary system was developed in the western slope along a fault-trough-typed valley.The sedimentary period from the first to second members developed a strike-slip-fault depression,during which the activity of the Chengbei Fault was significantly weakened,and that of the Chengzikou Fault remained relatively strong.The steep slope zone and the western slope both inherited the development of the delta sedimentary system along material supply route.The exploration practice has verified that the sand-body development area was resulted from the structural sediment-ary response,indicating the direction for oil and gas exploration in the study area.关键词
埕北凹陷/沙河街组/构造演化/沉积体系/油气勘探Key words
Chengbei Sag/Shahejie Formation/structural evolution/sedimentary system/oil and gas exploration分类
海洋科学引用本文复制引用
郝冉冉,吴智平,王永诗,武群虎,王蛟..埕北凹陷沙河街组构造-沉积响应特征与油气勘探意义[J].海洋地质前沿,2024,40(3):22-30,9.基金项目
国家科技重大专项"渤海湾盆地精细勘探关键技术"(2016ZX05006) （2016ZX05006）
