吐哈盆地红南9-12井新发现含油气地层归属探讨
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摘要
吐哈盆地红连油田下白垩统三十里大墩组与上侏罗统喀拉扎组之间发现了一套新的含油气地层。但是,对这套地层的归属存在不同的划分方案,这给新发现含油气地层的命名、对比与油气勘探潜力的评价以及开发技术政策的制定等诸多方面造成了影响。白垩系与侏罗系的界限对应于燕山构造运动第Ⅱ幕产生的不整合面,基于岩心、测井、地震反射等多方面资料的研究,认为吐哈盆地红南9-12井新发现的含油气地层位于不整合面之上,划归下白垩统三十里大墩组较为合理,三十里大墩组进一步划分为上下两个岩性段,新发现的含油气地层称为下段(K1s1),原划分的三十里大墩组统称上段(K1s2)。
A new hydrocarbon reservoir has been found between Sanshili Dadun group of Lower Cretaceous and Kelazha group of Upper Jurassic in Honglian oilfield of Tuha Basin.However,the different classification schemes of this formation adscription have effects on formation naming,evaluation of formation comparison and oil-gas exploration potential,and development technology policy of the new petroliferous formation.The dividing line between Cretaceous and Jurassic is corresponding to the unconformity interface which developed from the second episode movement of Yanshan tectonic.The new petroliferous formation of Hongnan 9-12 well in Tuha Basin overlies the unconformity interface and Sanshili Dadun group of Lower Cretaceous is reasonable to classify,and Sanshili Dadun group can be further divided into two lithologic intervals which are the new petroliferous formation called Lower interval(K1s1) and original Sanshili Dadun group called Up interval(Kls2) based on the study of core,logging and seismic reflection,etc.
A new hydrocarbon reservoir has been found between Sanshili Dadun group of Lower Cretaceous and Kelazha group of Upper Jurassic in Honglian oilfield of Tuha Basin.However,the different classification schemes of this formation adscription have effects on formation naming,evaluation of formation comparison and oil-gas exploration potential,and development technology policy of the new petroliferous formation.The dividing line between Cretaceous and Jurassic is corresponding to the unconformity interface which developed from the second episode movement of Yanshan tectonic.The new petroliferous formation of Hongnan 9-12 well in Tuha Basin overlies the unconformity interface and Sanshili Dadun group of Lower Cretaceous is reasonable to classify,and Sanshili Dadun group can be further divided into two lithologic intervals which are the new petroliferous formation called Lower interval(K1s1) and original Sanshili Dadun group called Up interval(Kls2) based on the study of core,logging and seismic reflection,etc.
引文
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[2]方世虎,宋岩,贾承造,等.准葛尔盆地白垩系底部砾岩与油气成藏的关系[J].天然气工业,2006,26(5):14.
[3]洪太元,蔡希源,何治亮,等.准噶尔盆地腹部白垩系底部不整合特征,新疆地质,2006,24(3):229-230.
[4]CHANG C,CHEN N,COQARD M P,et a1.Preliminary conclu-sions of the royal society and academica sinica,1985geotraverse of tibet[J].Nature,1986(323):501-5O7.
[5]JOLIVETM,BRUNEl M,SEWARD D,et a1.Mesozoic and Ce-nozoic tectonics of the northern edge of the Tibetan Plateau:Fis-sion—track constrains[J].Tectono Physics,2001(343):111—134.
[6]MATTE P,TAPP0NNIER P,ARNAUD N,et a1.Tectonics of western Tibet,between the Tarimand the Indus[J].Earth Planet Sci Lett,1996(142):311-330.
[7]方世虎,郭召杰,吴朝东,等.准噶尔盆地南缘侏罗系碎屑成分特征及其对构造属性、盆山格局的指示意义[J].地质学报,2006,80(2):201-204.
[8]李双建,王清晨,李忠.库车坳陷库车河剖面重矿物分布特征及其地质意义[J].石矿物学杂志,2005,24(1):54-6l.
[9]靳卫广,梅冥相.库车盆地白垩纪层序地层格架与古地理演化[J].新疆石油天然气,2005,1(1):14.
[10]赵杏媛,罗俊成,杨帆.粘土矿物研究成果在塔里木盆地油气勘探中的应用[J].新疆石油地质,2006,26(5):570-573.
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