Strike-slip Fault Architecture and its Control on Fractured Carbonate Reservoirs:Insight from Outcrops in the North-western Tarim Basin,NW China  

作　　者：YAO Yingtao ZENG Lianbo MAO Zhe SONG Yichen TAN Xiaolin LIN Bo LIU Guoping CAO Dongsheng Mehdi OSTADHASSAN ZHANG Qiao LI Hao 

机构地区：[1]National Key Laboratory of Petroleum Resources and Engineering,China University of Petroleum(Beijing),Beijing 102249,China [2]College of Geoscience,China University of Petroleum(Beijing),Beijing 102249,China [3]Institute of Energy,Peking University,Beijing 100871,China [4]Exploration and Production Research Institute of the Northwest Oilfield Branch Company,SINOPEC,Urumqi 830000,China [5]Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development,Ministry of Education,Northeast Petroleum University,Daqing,Heilongjiang 163318,China [6]School of Energy Resources,China University of Geosciences(Beijing),Beijing 100083,China

出　　处：《Acta Geologica Sinica(English Edition)》2025年第2期568-581,共14页地质学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant No.U21B2062).

摘　　要：Recent exploration has highlighted the critical role of strike-slip faults in shaping ultra-deep carbonate reservoirs in the Tarim Basin.This study integrates satellite imagery,UAV photogrammetry,outcrop surveys and microscopic analysis to investigate the architecture of these faults and their impact on reservoir petrophysical properties.The strike-slip faults exhibit cores consisting of calcite bands,fault breccias and fractures,while the damage zones are predominantly fractured.Thicker fault cores and fault zones are associated with more extensive reservoir development.Individual strike-slip fault zones are primarily characterized by two sets of fractures intersecting the fault at small angles.When two fault systems interact,the dominant pattern is two sets of fractures intersecting the main fault at small angles and one set at larger angles,facilitating the formation of large-scale reservoirs.We propose a model for the fault core,which primarily consists of a calcite band and fault breccias.These breccias are composed of original host rock,calcite cement and quartz,which exhibit poor physical properties,while fractures and vugs show favorable reservoir characteristics.This model offers valuable insights into the development of fault-controlled reservoirs,particularly in the Tarim Basin.

关 键 词：strike-slip fault carbonate reservoir fault zone heterogeneity reservoir physical properties Tarim Basin 

分 类 号：P618.13[天文地球—矿床学]