石油勘探与开发2026，Vol.53Issue(4)：802-811,10.DOI:10.11698/PED.20250348
塔里木盆地满西地区奥陶系台缘礁滩断溶体新认识及勘探方向
New insights and exploration directions for Ordovician platform-margin reef-shoal fault-karst reservoirs in the Manxi area,Tarim Basin,NW China
摘要
Abstract
Based on data including seismic interpretation,well logs and core slice,analyses were conducted on seismic reflection patterns,stages and distribution of faults,planar distribution of sedimentary facies,types of reservoir spaces,and genesis of reservoirs.This study identified the types of Ordovician carbonate platforms in the Manxi area of the Tarim Basin,analysed the controlling factors for high-quality reservoirs and hydrocarbon accumulation,established an accumulation model,and proposed potential exploration targets of oil and gas.The research indicates that the Ordovician in the Manxi area is characterized by a rimmed platform depositional system,where the platform-margin reef-shoal complexes cover an area of approximately 5 091 km2.These complexes,superimposed with multi-stage karstification and reticulated fractures,form high-quality fracture-cavity reservoirs,which exhibit a north-south orientation,large-scale distribution,and excellent storage capacity.The Ordovician platform-margin reef-shoal zone is situated within the hydrocarbon-generation center comprising the source rocks in the Precambrian Yuman rift trough,the Yuertusi Formation,and the Cambrian to Ordovician platform-margin foreslope facies.Large-scale hydrocarbon-enriched zones are densely distributed in a north-south trend within the interval from the Ordovician Penglaiba Formation to the third member of the Yingshan Formation,while exhibiting a linear distribution pattern from the second member of the Yingshan Formation to the Yijianfang Formation.Guided by these insights,Well Qingyu 2 was drilled,and it achieved a high flow rate of 105.6×104 m3/d gas from the second member of the Yingshan Formation during test,with a stable tubing pressure of 107 MPa.This records a significant exploration breakthrough in the Ordovician platform-margin zones in the Manxi area,and reveals a new domain for reserve growth.The research results provide valuable guidance for exploring ultra-deep carbonate reservoirs in the Tarim Basin.关键词
台缘礁滩体/断溶体/三元控储模式/成藏模式/超深层碳酸盐岩/奥陶系/满西地区/塔里木盆地Key words
platform-margin reef-shoal complex/fault-karst reservoir/three-factor-controlled reservoir model/accumulation model/ultra-deep carbonate rock/Ordovician/Manxi area/Tarim Basin分类
能源科技引用本文复制引用
白雪峰,罗富文,程林峰,张元高,闫博,潘文庆,张君龙,刘洋,张云峰,曹彦清,戴世立..塔里木盆地满西地区奥陶系台缘礁滩断溶体新认识及勘探方向[J].石油勘探与开发,2026,53(4):802-811,10.基金项目
国家科技重大专项"塔里木盆地盆山体系油气成藏机制与新领域勘探技术"(2025ZD1400500) （2025ZD1400500）
国家自然科学基金面上项目"埋藏期去白云石化机制及储集意义"(42272181) （42272181）
