塔东2号构造断裂系统形成演化及对碳酸盐岩油气成藏的影响
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摘要
塔东2号背斜构造在晚志留世开始形成雏形,晚三叠世基本定型。通过对塔东2号背斜构造二维地震资料、塔东2井区三维地震资料和塔东地区二维地震资料的精细解释,构建了塔东2号构造的断裂系统。断裂系统主要分两期:分别是古生代断裂系统,中生代断裂系统,这两期断裂系统均受控于包括车尔臣一级断裂在内的塔东南地区逆冲断裂系。背斜构造地区主要发育寒武系碳酸盐岩烃源岩,发育寒武系、震旦系两大套储盖组合及前震旦系变质岩潜在储盖组合,具有良好的油气勘探前景。断裂系统对塔东2号构造的储层改善和油气的疏导运移起着至关重要的作用,同时也可能导致了油藏后期破坏的发生。
As an anticline, Structure Tadong2 was formed originally at late Silurian stage, and was shaped at late Triassic. Based on the detailed interpretation of 2-dimensional seismic profiles of Structure Tadong2,3-dimensional seismic profiles of Wellblock Tadong2 and the 2-dimensional seismic profiles of the eastern Tarim Basin, the fault system of Structure Tadong2 was established.It mainly contained two subfault systems: the Mesozoic fault system and the Paleozoic fault system, these two subfault systems were both controlled by the north thrusting fault system which contained Cheerchen Fault.Tadong2 Structure contains mainly Cambrian oil source rocks and two series of source-cover mixes in Sinian and Cambrian, and is a series of potential source-cover mixes in pro-Sinian rocks, so the anticline structure has a good exploration prospect of oil and gas. The fault system plays the most important role in improving the reservoirs. On the other hand, it may also destroy the oil and gas source.
As an anticline, Structure Tadong2 was formed originally at late Silurian stage, and was shaped at late Triassic. Based on the detailed interpretation of 2-dimensional seismic profiles of Structure Tadong2,3-dimensional seismic profiles of Wellblock Tadong2 and the 2-dimensional seismic profiles of the eastern Tarim Basin, the fault system of Structure Tadong2 was established.It mainly contained two subfault systems: the Mesozoic fault system and the Paleozoic fault system, these two subfault systems were both controlled by the north thrusting fault system which contained Cheerchen Fault.Tadong2 Structure contains mainly Cambrian oil source rocks and two series of source-cover mixes in Sinian and Cambrian, and is a series of potential source-cover mixes in pro-Sinian rocks, so the anticline structure has a good exploration prospect of oil and gas. The fault system plays the most important role in improving the reservoirs. On the other hand, it may also destroy the oil and gas source.
引文
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[2]贾承造,魏国齐.塔里木盆地构造特征与含油气性[J].科学通报,2002,47(增):1~8.
[3]汤良杰,张一伟,金之钧,等.塔里木盆地、柴达木盆地的开合旋回[J].地质通报,2004,23(3):254~260.
[4]Hsu KJ.Relict back-arc basins:principles of recognition and possible newexamples fromChina[A].In:Kleinpell K L,Paola Ceds.New perspectives in basin analysis[M].New York:Springer-Verlag,1988.245~263.
[5]GrahamS A,Hendrix S M,Wang L B,et al.Collisional successor basins of western China:i mpact of tectonicinheritance on sand com-position[J].Geological Society of America Bulletin,1993,105(3):32~344.
[6]Yin A,Rumelhart P E,Butler R,et al.Tectonic history of the Altynfault systemin northern Tibet inferredfrom Cenozoic sedi menta-tion[J].Geological Society of America,2002,114(10):1257~1295.
[7]卢华复,王胜利,罗俊成,等,塔里木盆地东部断裂系统及其构造演化[J].石油与天然气地质,2006,27(4):433~441.
[8]贾承造,李本亮,张兴阳,等.中国海相盆地的形成与演化[J].科学通报,2007,52(增1):1~8.
[9]贾承造.塔里木盆地构造特征与油气聚集规律[J].新疆石油地质,1999,20(3):177~183.
[10]刘朝露,贾承造,夏斌,等.塔东地区盆山耦合与油气成藏模式研究[J].天然气地球科学,2005,16(5):552~558.
[11]何登发,贾承造,李德生,等.塔里木多旋回盆地的形成与演化[J].石油与天然气地质,2005,26(1):64~77.
[12]王元龙,成守德.新疆地壳演化与成矿[J].地质科学,2001,36(2):129~143.
[13]何登发,李德生,吕修祥,等.中国西北地区含油气盆地构造类型[J].石油学报,1996,17(4):8~18.
[14]何登发,周新源,张朝军,等.塔里木地区奥陶纪原型盆地类型及其演化[J].科学通报,2007,52(增1):126~135.
[15]魏国齐,贾承造,李本亮,等.塔里木盆地南缘志留-泥盆纪周缘前陆盆地[J].科学通报,2002,47(1):44~48.
[16]许效松,汪正江,万方,等.塔里木盆地早古生代构造古地理演化与烃源岩[J].地学前缘,2005,12(3):49~57.
[17]楼雄英,许效松.塔里木早古生代晚期构造-沉积响应[J].沉积与特提斯地质,2004,24(3):72~79.
[18]万天丰.中国大陆早古生代构造演化[J].地学前缘,2006,13(6):30~42.
[19]杨树锋,贾承造,陈汉林,等.特提斯构造带的演化和北缘盆地群形成及塔里木天然气勘探远景[J].科学通报,2002,47(增):36~43.
[20]刘永江,Franz Neubauer,葛肖虹,等.阿尔金断裂年代学和阿尔金山隆升[J].地质科学,2007,42(1):134~146.
[21]刘永江,葛肖虹,Genser J,等.阿尔金断裂带构造活动的40Ar/39Ar年龄证据[J].科学通报,2003,48(12):1335~1341.
[22]Jolivet M,Brunel M,Seward D,et al.Mesozoic and Cenozoic tectonics of the northern edge of the Tibetan plateau:fission-track con-straints[J].Tectonophysics,2001,343(1-2):111~134.
[23]Sobel E R,Arnaud N,Jolivet M,et al.2001.Jurassic to Cenozoic exhumation history of the Altyn Tagh range,northwest China,constrained by 40Ar/39Ar and apatite fission track thermochronology[A].In:Paleozoic and Mesozoic Tectonic Evolution of Centraland Eastern Asia:Fromcontinental Assembly to Intercontinental Deformation[C].Geological Society of America Memoir,1994.247~267.
[24]莫宣学,潘桂棠.从特提斯到青藏高原形成:构造-岩浆事件的约束[J].地学前缘,2007,13(6):43~51.
[25]孙玉善,金英爱,顾乔元,等.塔东2井古油藏成藏期分析[J].石油勘探与开发,2003,30(5):31~33.
[26]张水昌,王招明,王飞宇,等.塔里木盆地塔东2油藏形成历史-原油稳定性与裂解作用实例研究[J].石油勘探与开发,2004,31(6):25~31.
[27]肖中尧,黄光辉,卢玉红,等.塔里木盆地塔东2井原油成因分析[J].沉积学报,2004,22(增):66~72.
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