塔里木盆地台盆区三叠系层序结构及层序演化模式
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摘要
采用经典层序地层学与现代沉积学的原理和方法,着眼于塔里木盆地台盆区的整体研究,综合利用地震、钻井、测井等资料,探讨了台盆区层序内部结构及层序演化模式。分析表明,台盆区三叠系主体在挤压背景下发生挠曲而大面积稳定沉降,在古克拉通盆地基础上形成开阔的坳陷型湖盆。内部层序结构具有经典层序地层学缓坡背景下层序模式特点,具明显的"三元"结构,因湖盆坡度十分宽缓,水体较浅,低位体系域低位扇体发育较少,湖扩体系域呈现远距离的上超,高位体系域具波及范围广泛的平缓前积反射。层序内幕结构表现为单个层序内沉降中心向北迁移以及多个层序沉降中心总体向北迁移的特征,即是层序受控于幕式挤压挠曲作用的具体体现,并与该时期北部沉降、南部抬升的基底变形特点一致。
Although the sedimentation and sequence stratigraphy of the Triassic from Tabei area in Tarim Basin has been studied in the past,research on the sequence structures and evolution patterns on the whole basin range is rare,especially in the depression lake basin under compressional background.Using the theories and methods of classical sequence stratigraphy and modern sedimentology,emphasizing the overall research of the whole platform area of Tarim Basin,we analyzed seismic data,logging and drilling core data of Triassic in Tarim Basin and discussed the sequence structures and evolution patterns in plateform area.The results show that plateform area of Triassic is deposited stablely in compressional background,and broad depression basin is formed in the paleocraton basin.Internal sequence structures have the feature of classic sequence stratigraphy in the gentle slope background,which have three dimensional structures.Because of wide and slow slope and shallow water in the basin,low fan body of lowstand systems tract is not much developed,and transgressive systems tract has the feature of onlap with a long distance.The wide spread range of gentle reflection is well developed in highstand systems tracts.Centers of subsidence in a single and multiple sequences move into northward is the typical insider sequence structure,which shows that sequence structures and evolution patterns are controlled by the compaction flexture,and this phenomenon is consistant with the basal deformation of sedimentation in the north and uplift in the south.
Although the sedimentation and sequence stratigraphy of the Triassic from Tabei area in Tarim Basin has been studied in the past,research on the sequence structures and evolution patterns on the whole basin range is rare,especially in the depression lake basin under compressional background.Using the theories and methods of classical sequence stratigraphy and modern sedimentology,emphasizing the overall research of the whole platform area of Tarim Basin,we analyzed seismic data,logging and drilling core data of Triassic in Tarim Basin and discussed the sequence structures and evolution patterns in plateform area.The results show that plateform area of Triassic is deposited stablely in compressional background,and broad depression basin is formed in the paleocraton basin.Internal sequence structures have the feature of classic sequence stratigraphy in the gentle slope background,which have three dimensional structures.Because of wide and slow slope and shallow water in the basin,low fan body of lowstand systems tract is not much developed,and transgressive systems tract has the feature of onlap with a long distance.The wide spread range of gentle reflection is well developed in highstand systems tracts.Centers of subsidence in a single and multiple sequences move into northward is the typical insider sequence structure,which shows that sequence structures and evolution patterns are controlled by the compaction flexture,and this phenomenon is consistant with the basal deformation of sedimentation in the north and uplift in the south.
引文
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[21]王家豪,王华,陈红汉,等.前陆盆地的构造演化及其沉积、地层响应:以库车坳陷下白垩统为例[J].地学前缘,2007,14(4):114-122.
[2]刘震,赵政璋,赵阳,等.含油气盆地岩性油气藏的形成和分布特征[J].石油学报,2006,27(1):17-23.
[3]Sun Longde.Donghe sandstone subtle reservoir exploration anddevelopment technology in Hade 4Oilfield[J].Petroleum Sci-ence,2004,1(2):35-43.
[4]吕雪雁,朱筱敏,申银民,等.塔里木盆地台盆区三叠系层序地层研究和有利勘探区预测[J].石油勘探与开发,2002,29(1):32-35.
[5]刘辰生,郭建华.新疆阿克库勒地区三叠系中油组层序地层学研究[J].地层学杂志,2008,32(1):42-45.
[6]高岩,赵秀岐,张伟,等.塔里木盆地层序地层特征与非构造圈闭勘探[M].北京:石油工业出版社,2003.
[7]张雷,王英民,杨婷,等.阿克亚苏地区三叠系中油组有利圈闭预测[J].石油地球物理勘探,2009,44(6):739-746.
[8]党青宁,赵宽志,孙雄伟,等.阿瓦提凹陷三叠系地震相特征及有利勘探区预测[J].新疆石油地质,2009,30(2):208-211.
[9]丁勇,王允诚,黄继文.塔里木盆地塔河地区三叠系油气勘探现状与对策[J].石油实验地质,2008,30(6):552-557.
[10]蒲仁海,翟晓先,严华,等.塔河油田典型地震相[J].石油地球物理勘探,2007,42(3):308-314.
[11]贾承造,魏国齐,姚慧君,等.盆地构造演化与区域构造地质:塔里木盆地油气勘探丛书[M].北京:石油工业出版社,1995.
[12]高岩,赵秀岐,张伟,等.塔里木盆地层序地层特征与非构造圈闭勘探[M].北京:石油工业出版社,2003.
[13]陈旭,董玉文,郝广雷.塔中地区早二叠世岩浆活动特征及其石油地质意义[J].地质科技情报,2009,29(5):78-83.
[14]陈旭,董玉文,陈红汉,等.塔里木盆地台盆区三叠系三级层序界面和体系域界面的识别与应用[J].沉积学报,2011,29(5):917-923.
[15]Zhu Hongtao,Chen Kaiyuan,Liu Keyu,et al.A sequence stra-tigraphic model for reservoir sand-body distribution in theLower Permian Shanxi Formation in the Ordos Basin,northernChina[J].Marine and Petroleum Geology,2008(25):731-743.
[16]Catuneanu C,Abreu V,Bhattacharya P J,et al.Towards thestandardization of sequence stratigraphy[J].Earth-Science Re-views,2009,92:1-33.
[17]王居峰,郭彦如,张延玲.鄂尔多斯盆地三叠系延长组层序地层格架与沉积相构成[J].现代地质,2009,23(5):803-808.
[18]Bill D.A historical reflection on reflections[J].The LeadingEdge,2006(S):46-70.
[19]王华,任建业,王家豪,等.层序地层学的基本原理、方法与应用[M].武汉:中国地质大学出版社,2007:200-398.
[20]李丕龙,冯建辉,陆永潮,等.准噶尔盆地构造沉积与成藏[M].北京:地质出版社,2010:5-340.
[21]王家豪,王华,陈红汉,等.前陆盆地的构造演化及其沉积、地层响应:以库车坳陷下白垩统为例[J].地学前缘,2007,14(4):114-122.
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