轮南古潜山走滑断裂特征及其对油气成藏的影响  

Characteristics of strike-slip faults in Lunnan buried hill and its influence on hydrocarbon accumulation

作　　者：吴梅莲[1] 刘永福[1] 彭鹏[1] 柴雄[1] 晏楠[1] WU Meilian;LIU Yongfu;PENG Peng;CHAI Xiong;YAN Nan(Tarim Oilfield Company,PetroChina,Korla 841000,China)

机构地区：[1]中国石油塔里木油田分公司,新疆库尔勒841000

出　　处：《断块油气田》2021年第4期456-462,共7页Fault-Block Oil & Gas Field

摘　　要：基于对碳酸盐岩断溶体岩溶模式的认识,利用三维地震资料,开展轮南古潜山走滑断裂特征及其控储控藏作用研究。轮南古潜山走滑断裂极为发育,运用“辅助层+断裂敏感地震属性”技术对走滑断裂开展分层刻画,根据断裂间切割关系与平面、剖面特征,将其划分为“X”走滑断裂、北东东向走滑断裂和南北向走滑断裂3组,其中北东东向走滑断裂和南北向走滑断裂具多期活动性。研究表明:走滑断裂不仅控制内幕区层间断溶体岩溶储层,而且对潜山区暗河型岩溶储层的发育分布也起着重要控制作用;走滑断裂深部沟通寒武系烃源岩,是油气运移的有利通道,研究区高产井多位于走滑断裂附近,部分北东东向和南北向多期活动的走滑断裂作为喜山期气侵主要通道,控制了轮南古潜山“西油东气”的整体油气藏格局。Based on the understanding of carbonate fault-solution karst model,the characteristics of strike-slip faults and their reservoir controlling effects in Lunnan buried hill were studied using 3D seismic data.The strike-slip faults of Lunnan buried hill are extremely developed.The technology of"auxiliary layer and fault sensitive seismic attribute"is used to depict the strike-slip faults layer by layer.According to the cutting relationship between faults and the plane and vertical characteristics,it can be divided into three groups:X-shaped strike-slip fault,NEE strike slip fault and NS strike-slip fault.The NEE and NS strike-slip faults have multiple periods of activity.The study shows that strike-slip faults not only control the fault-solution karst reservoirs in the inner area,but also play an important role in the development and distribution of subterranean river karst reservoirs.The deep part of the strike-slip fault connects the Cambrian source rocks and is a favorable channel for oil and gas migration.Most of the high-yield wells in the study area are located near the strike-slip faults.Some of the strike-slip faults with multi-stage activities in the NEE and NS directions are the main channels for gas invasion in the Himalayan period,controlling the overall reservoir characteristics of"west oil and east gas"in Lunnan buried hill.

关 键 词：走滑断裂 岩溶储层 运移通道 轮南古潜山 

分 类 号：TE121[石油与天然气工程—油气勘探]