海洋地质前沿2024，Vol.40Issue(7)：36-44,9.DOI:10.16028/j.1009-2722.2023.119
西湖凹陷平湖斜坡带物源-坡折耦合控砂模式
Sand-controlling model of source-slope-break coupling in Pinghu Slope Belt,Xihu Sag
摘要
Abstract
Pinghu Slope Belt has become one of the important fields of lithologic reservoir exploration in the Xi-hu Sag.Exploration and production have confirmed that the distribution of sand bodies in the Pinghu Formation is complex,and sand body characterization guided by sand-controlling model has become the key to the break-through of lithologic reservoir exploration.Based on the studies on the source system and slope-break zone,the distribution characteristics of sand body under the control of source and slope-break coupling in the target area were summarized in this paper.The characteristics of ravines and heavy minerals indicate that there are three source systems in the target area:the western source and southwestern source of Haijiao Uplift,and the dynamic source of Baoyunting paleo-uplift,which controlled the source of sand material in the target area.Under the con-trol of paleo-uplift,differential activities of faults and sedimentation,three types of slope-breaks developed in the target area,namely faulted slope-breaks,flexural slope-breaks,and depositional slope-breaks,controlled jointly the topographic features of the target area.Source system and slope-break coupling controlled the dynamic pro-cess of sediment from source to sink.Under the joint control of the southwestern source and the dynamic source of Baoyunting Uplift,the development of mixed-source sand body accretion is dominant in the lower member of Pinghu Formation.Under the main control of the source of the western Haijiao Uplift,the single-source-reforma-tion sand-controlling mode restricted by flexural slope-break is dominant in the middle member of Pinghu Forma-tion.Under the main control of the depositional slope break,the transitional sand-controlling mode of gentle slope was developed in the upper member of Pinghu Formation.关键词
平湖斜坡带/物源/坡折带/控砂模式/岩性油气藏Key words
Pinghu Slope Belt/source/slope-break/sand-controlling mode/lithologic reservoir分类
海洋科学引用本文复制引用
李帅,俞伟哲,秦兰芝,张粲..西湖凹陷平湖斜坡带物源-坡折耦合控砂模式[J].海洋地质前沿,2024,40(7):36-44,9.基金项目
中海石油(中国)有限公司上海分公司生产科研项目"西湖凹陷古近系区域沉积体系研究及规模岩性圈闭勘探方向"(CCL2023SHP S010RS) （中国）
