塔里木盆地富满地区走滑断裂带精细刻画及勘探应用成效  

Identification of Strike-Slip Faults and Exploration Breakthroughs in the Fuman Area,Tarim Basin

作　　者：张银涛[1,2] 余一欣 谢舟[1] 孙冲[1] 王小鹏[1] 申彪[1] 杜琦睿[3,4] ZHANG Yintao;YU Yixin;XIE Zhou;SUN Chong;WANG Xiaopeng;SHEN Biao;DU Qirui(Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000,China;College of Geosciences,China University of Petroleum,Qingdao,Shandong 266580,China;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)

机构地区：[1]中国石油塔里木油田分公司,新疆库尔勒841000 [2]中国石油大学(华东)地球科学学院,山东青岛266580 [3]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 [4]中国石油大学(北京)地球科学学院,北京102249

出　　处：《现代地质》2024年第6期1417-1430,共14页Geoscience

基　　金：国家自然科学基金项目(42372145);中国石油塔里木油田分公司科技项目(T202406)。

摘　　要：塔里木盆地中部阿满过渡带内的富满地区走滑断裂带发育,并对奥陶系碳酸盐岩具有明显的控储控藏作用,但该地区的走滑断裂仍然存在难以识别的问题。为了精细刻画富满地区的走滑断裂,本次研究基于该地区最新三维地震资料,通过多重滤波、相干分析、信号分解等方法技术对主干和次级走滑断裂带进行精细识别,并建立走滑断裂带分级量化标准,同时利用“三定”法评价油气资源量,落实走滑断裂的勘探潜力。在塔北隆起和中央隆起区共识别出70条规模较大的主干走滑断裂带,根据断裂带延伸长度、活动期次及其强度等特征,划分出25条Ⅰ级和45条Ⅱ级控储控藏的走滑断裂带,其中富满地区发育主干走滑断裂34条。结合走滑断裂刻画及钻探情况,提出“定断裂带体系”“定缝洞体边界”“定油气藏单元”的奥陶系碳酸盐岩油气藏“三定”资源量评价方法,并初步确定70条走滑断裂带的石油资源量约为20×10^(8)t、天然气约为1×10^(12)m^(3),富满地区石油资源量约11×10^(8)t。在走滑断裂带精细刻画基础上新落实三条油气富集带,并得到钻探证实,表明富满地区不同级别的走滑断裂带均具备增储上产的巨大潜力。本研究不仅有利于推动塔里木盆地台盆区走滑断裂带研究以及碳酸盐岩断控-缝洞型油气藏勘探开发,对其他克拉通盆地内走滑断裂体系研究也具有重要借鉴意义。Strike-slip fault zones well-developed in the Fuman area within the Aman transition zone of the Tarim Basin.These faults significantly impact the reservoir characteristics and hydrocarbon accumulation in the Ordovician carbonate rocks.However,identifying strike-slip faults in the Fuman area remains challenging.Using new 3D seismic data from the Fuman area,this study has identified and characterized primary and secondary strike-slip faults through multiple filtering,coherence analysis,and signal decomposition techniques.Additionally,a quantitative standard for classifying strike-slip faults has been established.Furthermore,the exploration potential of the strike-slip faults has been evaluated using the“three determination”approach.The results show that 70 large-scale strike-slip faults are developed within the Tabei Uplift and Central Uplift belts.Based on their development lengths,activity periods,and intensity,the primary strike-slip faults are classified into Class I(25 faults)and Class II(45 faults).In the Fuman area,34 major strike-slip faults have been identified.Based on fault characterization and drilling data,the“three determination”method,encompassing the determination of faults system,fracture-cavity boundaries,and reservoir units,is proposed for evaluating resources in the Ordovician carbonate reservoirs.The resources associated with the 70 strike-slip faults include 20×10^(8)t of oil and 1×10^(12)m^(3)of gas,with 11×10^(8)t of oil located specifically in the Fuman area.Based on detailed characterization of the strike-slip faults,three new structural belts with abundant oil and gas resources have been identified and confirmed by wells.The study indicates that strike-slip faults of various scales in the Fuman area hold significant potential for increasing reserves and production.This study not only advances research on strike-slip faults and the exploration of fault-controlled fractured-vuggy carbonate reservoirs in the Tarim Basin platform area but also provide valuable guidance for studying

关 键 词：走滑断裂带 断裂识别技术 断裂分级 “三定”评价方法 富满地区 塔里木盆地 

分 类 号：P618.1[天文地球—矿床学] TE122.1[天文地球—地质学]