西湖凹陷平北地区断裂控藏作用研究  

Reservoir-Control Effect of Faults in Pingbei Area of Xihu Depression

作　　者：晏玉环[1] 袁忠鹏 朱碧兰 董靓雯 黄畅 李昆[1] 李倩[1] YAN Yuhuan;YUAN Zhongpeng;ZHU Bilan;DONG Jingwen;HUANG Chang;LI Kun;LI Qian(Institute of Exploration and Development,SINOPEC Shanghai Offshore Oil&Gas Company,Shanghai 200120,China)

机构地区：[1]中国石油化工股份有限公司上海海洋油气分公司勘探开发研究院,上海200120

出　　处：《海洋石油》2024年第2期1-6,共6页Offshore Oil

摘　　要：平湖构造带北部(简称平北地区)断裂复杂,复杂断裂不仅控制着圈闭的形成,而且对油气疏导和保存起着至关重要的作用。该文结合最新的地震和钻井资料,对平北地区断裂特征及控圈控藏作用进行梳理。结果表明,平北地区受控于早期鼻状隆起构造背景,断裂系统十分发育,形成自WS向NE散开的帚状断裂体系,主要发育断背斜、断鼻和断块等构造圈闭;同时北东走向的断裂与来自西部物源的条带状三角洲和潮汐作用的砂体相配合,形成一系列断裂-岩性复合圈闭。断裂对油气成藏的控制作用主要体现在两个方面,一方面是作为沟源断裂,起到疏导油气的作用;另一方面是作为圈闭边界,起到封堵油气的作用。该研究成果对研究区下步勘探部署可提供一定的技术支持。Faults in the northern part of Pinghu tectonic zone(Pingbei area)are complex,complicated faults not only control the formation of traps,but also play a crucial role in oil and gas migration and preservation.Based on the latest seismic and drilling data,this study reviewed the fault characteristics and the function of controlling trap and reservoir in the northern Pingbei area.The results showed that the northern Pinghu area was controlled by the early nasal uplifting and faults were very well developed,forming a broom fault system spreading from WS to NE.Structural traps such as fault anticline,fault nose and fault block are mainly developed.At the same time,the NE-trending faults combined with the banded delta and the tidal sand from the western sources formed a series of fault-lithology composite traps.The faults controlling effect on oil and gas accumulation is mainly manifested in two aspects:on one hand,as source faults,they can divert hydrocarbons;on the other hand,as trap boundaries,they play a key role in sealing oil and gas.This study can provide some technical support for the next exploration deployment in Pingbei area.

关 键 词：平北断裂特征 构造圈闭 复合圈闭发育模式 控藏因素 

分 类 号：P618.13[天文地球—矿床学]