江陵凹陷断层封闭性评价及勘探潜力  

Fault Trap Evaluation and Exploration Potential in Jiangling Sag

作　　者：刘建党[1] 兰正凯 贾超[1] Liu Jiandang;Lan Zhengkai;Jia Chao(Centre of SINOPEC Petroleum Exploration and Production Research Institute,Beijing 100083,China;China University of Geosciences(Wuhan),Wuhan,Hubei 430074,China;Tracy Energy Technology(Hangzhou)Co.,Ltd.,Hangzhou,Zhejiang 310000,China)

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国地质大学(武汉),湖北武汉430074 [3]特雷西能源科技(杭州)有限公司,浙江杭州310000

出　　处：《特种油气藏》2022年第3期36-42,共7页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金“走滑断裂带控藏机理研究”(41872161)。

摘　　要：江陵凹陷断裂系统复杂,断层封闭性评价难度极大,断裂封闭性能及其组合特征、影响因素为江陵凹陷后期勘探部署带来挑战。利用江陵凹陷现有资料和前期研究成果,运用地质学原理,系统分析了江陵凹陷的构造特征和断层的演化历史,划分了主要断层系统,并在江陵凹陷断层侧向封闭性研究的基础上,分析了断层封闭机理,建立了江陵凹陷断层封闭模式。结果表明:低渗透带断层能够形成封闭,断层封闭机理为断裂带与围岩之间存在差异性的渗透能力;影响断层封闭性的因素包括储层岩性对接和泥岩涂抹率、岩石性质、断层附近渗透率等。在对江陵凹陷断层的封闭性综合分析的基础上,在江陵凹陷陵72井以南部署1口探井,打开了江陵凹陷勘探新局面。研究成果对断裂在油气成藏的作用及其封闭特征研究提供了理论依据,对同类油田的勘探部署具有借鉴意义。The complex fracture system in Jiangling Sag makes fault trapping evaluation extremely difficult,and the fault trapping performance and its combination characteristics and influencing factors bring challenges to the later exploration deployment in Jiangling Sag.According to the existing data and previous research results of Jiangling Sag and the principles of geology,the tectonic characteristics of Jiangling Sag and the evolution history of the faults were systematically analyzed,and the main fault systems were classified,the fault trapping mechanism was analyzed on the basis of studies on lateral fault trap,Jiangling Sag,and a fault trap mode of Jiangling Sag was established.The results showed that,the faults in the low-permeability zone could be trapped due to the different permeability between the fault zone and the surrounding rock,and the factors affecting fault trap included lithology joint,mudstone coating rate,rock properties,and permeability near the fault.Based on the comprehensive analysis of the fault trap in Jiangling Sag,a prospecting well was selected to the south of Well Ling 72,Jiangling Sag to making a new start for exploration in Jiangling Sag.The study results provide a theoretical basis for the role of faults in hydrocarbon accumulation and their trap characteristics,and can be used as a reference for the exploration and deployment of similar oilfields.

关 键 词：断层封闭性 泥岩 断裂系统 成藏条件 江陵凹陷 

分 类 号：TE121.1[石油与天然气工程—油气勘探]