卡塔克隆起卡1南三维区Ⅱ号背冲断裂带勘探目标分析
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摘要
卡塔克隆起卡1南三维地震工区Ⅱ号背冲断裂带中的奥陶系岩溶储层和构造圈闭非常复杂,奥陶系岩溶是本区油气突破的关键因素。本文通过精细解释三维地震数据体,并与塔中46井实际钻后分层结果所反映的地震波组特征进行对比,追踪T70、T72波在塔中46井附近地层尖灭线的展布,结合岩洞成像的地震波反射特征和前人的地质成果,提出了Ⅱ号背冲断裂带中可能存在古岩溶风化壳储集体,根据三维地震资料计算出古岩溶风化壳在Ⅱ号背冲断裂带内的面积,并提出了有利目标带。
The Ordovician Strata,structures,karst reservoirs and structural traps are very complex in the No.Ⅱ back thrusting fault zone in the 3D seismic area of southern block Ka-1,Katake uplift.The Ordovician karst is the critical factor to the petroleum exploration in the area.The existence of ancient karst and weathering crust reservoirs in the No.Ⅱ back thrusting fault zone is put forward,through subtly interpreting 3D seismic data ,contrasting with the seismic composite wave characteristics reflected by the actual stratification of well TZ-46,tracking the spreading of depositional termination lines of T 07 and T 27around well TZ-46 and combining the seismic wave reflection characteristics of rock cavity imaging and previous geological study results.The area of ancient karst and weathering crust in the No.Ⅱ back thrusting fault zone is calculated based on the three-dimensional seismic data and favourable target for petroleum exploration is indicated.
The Ordovician Strata,structures,karst reservoirs and structural traps are very complex in the No.Ⅱ back thrusting fault zone in the 3D seismic area of southern block Ka-1,Katake uplift.The Ordovician karst is the critical factor to the petroleum exploration in the area.The existence of ancient karst and weathering crust reservoirs in the No.Ⅱ back thrusting fault zone is put forward,through subtly interpreting 3D seismic data ,contrasting with the seismic composite wave characteristics reflected by the actual stratification of well TZ-46,tracking the spreading of depositional termination lines of T 07 and T 27around well TZ-46 and combining the seismic wave reflection characteristics of rock cavity imaging and previous geological study results.The area of ancient karst and weathering crust in the No.Ⅱ back thrusting fault zone is calculated based on the three-dimensional seismic data and favourable target for petroleum exploration is indicated.
引文
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[3]刘忠保,丁炳松,高志前,等.塔中地区西部倾没端奥陶系高频层序地层格架中岩溶发育特征[J].石油天然气学报,2005,27(4):570～573
[4]张保银,孙建国,黄伟传,等.塔中地区速度场建立及变速成图[J].石油物探,2004,(6):608～611
[5]邹森林,苏娟,俞益新,等.卡塔克隆起卡1三维区奥陶系特殊地震反射体特征及属性探讨[J].中国西部油气地质,2006,2(3):312～316
[6]邹元荣,郭书元.塔中地区奥陶系碳酸盐岩表生岩溶分布特征及主控因素[J].新疆地质,2005,23(2):209～212
[7]程绪彬,潘文庆.塔里木盆地奥陶系古风化壳储层孔隙类型及其成因分析[J].天然气勘探与开发,2000,(1):36～42
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