塔里木盆地富满油田古生界走滑断裂发育特征及控圈模式  

Development characteristics of Paleozoic strike-slip fault and its control on traps in Fuman Oilfiled,Tarim Basin

作　　者：陈石 梁鑫鑫[1,2] 张银涛 谢舟[3] 黄伟[1,2] 宋兴国[1,2] 陈九洲 彭梓俊 杨俊鹏 CHEN Shi;LIANG Xinxin;ZHANG Yintao;XIE Zhou;HUANG Wei;SONG Xingguo;CHEN Jiuzhou;PENG Zijun;YANG Junpeng(State Key Laboratory of Petroleum Resources and Engineering,China University of Petroleum-Beijing,Beijing 102249,China;College of Geosciences,China University of Petroleum-Beijing,Beijing 102249,China;Tarim Oilfield Company,PetroChina,Korla 841000,China)

机构地区：[1]中国石油大学(北京)油气资源与工程全国重点实验室,北京102249 [2]中国石油大学(北京)地球科学学院,北京102249 [3]中国石油塔里木油田公司,库尔勒841000

出　　处：《石油科学通报》2025年第1期1-15,共15页Petroleum Science Bulletin

基　　金：国家自然科学基金面上项目(42472186)资助。

摘　　要：富满油田古生界超深层走滑断控缝洞型油气藏是塔里木盆地油气勘探开发的热点,但目前对区域内走滑断层发育特征、演化期次划分以及相应的控圈规律目前尚缺乏相关研究。本文基于富满油田新采集的三维地震资料,结合相干和最大似然等平面属性,对走滑断裂的空间展布特征进行了精细解译,并综合不整合构造、断层交切关系以及地层沉积特征等,厘定了走滑断层的活动时期,同时综合储集体特征与断裂空间展布的关系,对圈闭的类型和特征进行了划分与总结。研究表明,富满油田三维工区内走滑断裂平面展布具有典型分区发育的特征,可划分为4个变形区,包括断裂斜交区、边界限制区、主干断裂发育区以及断裂弱发育区。富满油田古生界走滑断裂垂向上由下至上可划分出3个构造变形层,深部构造变形层(TЄ_(3)之下)、中部构造变形层(TЄ_(3)-TO_(3)t)以及浅部构造变形层(TO_(3)t-TP)。深部构造变形层中,基底普遍发育裂陷结构且走滑断层活动强度较弱;中部构造变形层中,走滑断裂活动强烈,大部分于奥陶系碳酸盐岩顶面附近发育正花状构造;浅部构造变形层中,与走滑断裂活化相关的雁列式正断层广泛发育,垂向上具有分层分布的特征。走滑断裂的演化过程整体可大致厘定出3个主要活动期次,分别为中晚寒武世、中晚奥陶世以及志留-石炭纪,其中大部分断裂活动终止于中晚奥陶世,仅有部分晚期活化的大型走滑断层持续活动至志留-石炭纪。储层发育规模及位置受断裂的空间展布特征影响,在侧向致密基岩和上奥陶统盖层遮挡下,组合形成断控缝洞型圈闭,依据断裂平面几何学特征可划分出六类圈闭,分别为羽状型、辫状型、线性型、马尾状型、菱形叠接型以及软连接型。The Paleozoic ultra-deep strike-slip fault-controlled fracture-vuggy reservoirs in the Fuman Oilfield represent a focal point for hydrocarbon exploration and development in the Tarim Basin.However,current research on the regional development characteristics,evolutionary phases,and the governing principles of these strike-slip faults remains scarce.In this study,based on newly acquired 3-D seismic data from the Fuman Oilfield,and seismic planar attributes such as coherence and likelihood,we have conducted a refined interpretation of the spatial distribution patterns of the strike-slip faults.By integrating structural features of unconformities,the intersectional relationships of faults,and sedimentological characteristics of the strata,the active periods of the strike-slip faults are clarified.Concurrently,the classification and summary of trap types and their characteristics have been based on the correlation between reservoir attributes and the spatial arrangement of faults.The research reveals that the planar distribution of strike-slip faults across the 3D surveys of the Fuman Oilfield exhibits distinct zonal characteristics,categorizable into four deformation zones:the oblique zone of faults,the boundary-restricted zone,the main fault development zone,and the weak fault development zone.The Paleozoic strike-slip faults within the Fuman Oilfield can be stratified into three structural deformation layers from the deep to shallow:the deep structural deformation layer(below TЄ_(3)),the middle structural deformation layer(TЄ_(3)-TO_(3)t),and the shallow structural deformation layer(TO_(3)t-TP).In the deep structural deformation layer,the basement generally exhibits rift structures with weak strike-slip fault activity;in the middle structural deformation layer,strike-slip faulting is intense,with most developing positive flower-like structures near the top surface of the Ordovician carbonate rocks;in the shallow structural deformation layer,en echelon normal faults associated with the reactivation of strike-slip

关 键 词：塔里木盆地 富满油田 走滑断裂 分区发育 分层变形 分期活动 断控缝洞型圈闭 

分 类 号：P618.13[天文地球—矿床学] TE122[天文地球—地质学]