摘要
为明确走滑断裂对碳酸盐岩油气成藏的作用,基于三维地震资料,分析F_(Ⅰ)17走滑断裂北段的发育特征与构造变形过程,结合地质建模,开展走滑断裂形成及演化的砂箱物理模拟。研究区内的F_(Ⅰ)17走滑断裂可分为南、北2段,南段为近北东—南西走向,主要发育雁列式断裂,奥陶纪一间房组整体以隆升为主,垂向上的变形幅度较大;北段为近北北东—南南西走向,主要发育线性走滑断裂,在奥陶纪一间房组变形微弱,局部地区可见地层微幅度下掉。砂箱物理模拟实验结果表明:线性走滑断裂的主位移带上会形成一系列隆起带,而走向偏转的走滑断裂在南段形成一系列隆起带,在北段则表现为地层下掉;在同一应力条件下,走滑断裂初始走向的差异会导致断裂受力发生变化,进而影响其演化过程。F_(Ⅰ)17走滑断裂南段的压隆段应力更加集中,局部裂缝和溶洞更发育,油气更为富集,油气勘探效果优于北段。
To understand the role of strike‐slip faults in hydrocarbon accumulation in carbonate reservoirs,based on 3D seismic data,the development characteristics and tectonic deformation processes of the northern section of the F_(Ⅰ)17 strike‐slip fault in the Tarim basin were analyzed,and a sandbox physical simulation was performed on the formation and evolution of strike‐slip faults by using geological modeling.The F_(Ⅰ)17 strike‐slip fault is divided into two sections.The southern section,nearly NE-SW trending,is characterized by en echelon faults,with the Yijianfang formation showing a uplifting feature and significant vertical deformation during the Ordovician period.The northern section,nearly NNE-SSW trending,is dominated by linear strike‐slip faults,with the Yijianfang formation exhibiting weak deformation and slight subsidence in local areas during the Ordovician period.Sandbox physical simulation results show that a series of uplift zones formed along the main displacement zone of linear strike‐slip faults,while the deflected strike‐slip faults formed a series of uplift zones in the southern section and presented strata subsidence in the northern section.Under identical stress conditions,differences in the initial strikes of strike‐slip faults lead to the changes in the stress put on the faults,thereby influencing their evolution processes.The southern section of the F_(Ⅰ)17 strike‐slip fault is found with more concentrated stress in compressional uplift zone and more developed fractures and vugs locally,containing richer hydrocarbons.The southern section is expected to be superior in exploration to the northern section.
作者
蔡振忠
李兵
罗枭
李会元
李梦勤
李正阳
王青红
CAI Zhenzhong;LI Bing;LUO Xiao;LI Huiyuan;LI Mengqin;LI Zhengyang;WANG Qinghong(Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000,China;R&D Center for Ultra‐Deep Complex Reservoir Exploration and Development,CNPC,Korla,Xinjiang 841000,China;Xinjiang Engineering Research Center for Ultra‐Deep Complex Reservoir Exploration and Development,Korla,Xinjiang 841000,China;Research Institute of Exploration and Development,Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000,China)
出处
《新疆石油地质》
CAS
CSCD
北大核心
2024年第4期401-408,共8页
Xinjiang Petroleum Geology
基金
中国石油前瞻性基础性技术攻关项目(2021DJ1501)。
关键词
塔里木盆地
阿满过渡带
奥陶纪
走滑断裂
差异变形机制
物理模拟
Tarim basin
Aman transitional zone
Ordovician period
strike‐slip fault
differential deformation mechanism
physical simulation
作者简介
第一作者:蔡振忠(1970-),男,福建莆田人,教授级高级工程师,博士,油气勘探开发,(Email)caizz-tlm@petrochina.com.cn;通讯作者:李兵(1995-),男,湖北黄梅人,工程师,硕士,碳酸盐岩油气藏地质,(Tel)0996-2172889,(Email)libing1-tlm@petrochina.com.cn。
