新疆塔河油田石炭系层序地层分析及低水位岩性圈闭预测
|
摘要
对新疆塔河油田石炭系岩性圈闭的地震和钻井层序地层分析结果表明,石炭系由SQ1、SQ2、SQ3三个三级层序组成,分别以障壁岛—泻湖体系、潮控碎屑滨岸体系、辫状河三角洲体系为特征,总体反映了陆源供给由弱到强、研究区北部抬升的阶段性过程。在SQ2层序发育时期,地形平缓,砂体储层发育于海进体系域和高水位体系域的下部,导致与沉积作用相关的岩性圈闭发育。SQ1、SQ2层序的发育主要受海平面变化的控制;SQ3层序的形成主要受控于大塘中—晚期的构造挤压和抬升作用。SQ1层序内的鼻状凸起的两侧——西北部和东南部斜坡区、SQ3层序内的由北部褶皱隆起和南部差异压实联合作用形成的次级凹陷,是形成低水位岩性圈闭的有利场所。
The lithologic traps of the Carboniferous in Tahe Oil Field,Xinjiang have been paid fully attention to.In this paper,the sequence stratigraphy of the Carboniferous had been analyzed according to seismic and well data.Three third-grade sequences, namely SQ1,SQ2,SQ3,were identified.It is found that barrier island-lagoon system mainly developed in the SQ1;tide-dominated clastic shoreline system developed in the SQ2;and braided delta system mainly developed in the SQ3.This could show that terrigenous supplements became weak to strong,and that the north of the research area was uplifted.In the period of SQ2 development,the topography took on a wide and low-tilt slope.It is very unusual that sand-bodies in the SQ2 were distributed in the transgression system tract and the below of high system tract,so some lithologic traps associated with sedimentary were abundant.The study indicates that the SQ1 and SQ2 resulted from sea-level fluctuation,and the SQ3 from a tectonic uplifting in the middle or later period of Datang.Northwestern and southeastern slopes existed on the two sides of nose convex during the development of the SQ1.A sub-sag had been produced by southern differential compaction and northern folding before the SQ3.It is proposed that the slopes and the sub-sag are favorable for lithologic traps forming.
The lithologic traps of the Carboniferous in Tahe Oil Field,Xinjiang have been paid fully attention to.In this paper,the sequence stratigraphy of the Carboniferous had been analyzed according to seismic and well data.Three third-grade sequences, namely SQ1,SQ2,SQ3,were identified.It is found that barrier island-lagoon system mainly developed in the SQ1;tide-dominated clastic shoreline system developed in the SQ2;and braided delta system mainly developed in the SQ3.This could show that terrigenous supplements became weak to strong,and that the north of the research area was uplifted.In the period of SQ2 development,the topography took on a wide and low-tilt slope.It is very unusual that sand-bodies in the SQ2 were distributed in the transgression system tract and the below of high system tract,so some lithologic traps associated with sedimentary were abundant.The study indicates that the SQ1 and SQ2 resulted from sea-level fluctuation,and the SQ3 from a tectonic uplifting in the middle or later period of Datang.Northwestern and southeastern slopes existed on the two sides of nose convex during the development of the SQ1.A sub-sag had been produced by southern differential compaction and northern folding before the SQ3.It is proposed that the slopes and the sub-sag are favorable for lithologic traps forming.
引文
1 付清平 ,王贵全 ,杨曾荣 ,等 .新疆塔里木盆地石炭纪—二叠纪地层划分及沉积相 [R]. 1 999.
[1] 威尔格斯CK(徐怀大,魏魁生,洪卫东译).层序地层学原理(海平面变化综合分析)[M].北京:石油工业大学出版社,1992.49-157.
[2] 李思田,潘元林,陆永潮,等.断陷湖盆隐蔽油藏预测及勘探的关键技术——高精度地震勘探基础上的层序地层学研究[J].地球科学——中国地质大学学报,2002,27(5):592-598.
[3] 陆永潮,赵祖辉,陈平,等.东营凹陷高精度层序地层学研究及在油气勘探新领域中的应用[J].地球科学——中国地质大学学报,2001,26(增刊):105-108.
[4] 林畅松,潘元林,肖建新,等."构造坡折带"——断陷盆地层序分析和油气预测的重要概念[J].地球科学——中国地质大学学报,2000,25(3):260-265.
[5] 林畅松,刘景彦,蔡世祥,等.莺-琼盆地大型下切谷和海底重力流体系的沉积构成和发育背景[J].科学通报,2001,46(1):69-72.
[6] 赵秀岐,张振生,李洪文.塔里木盆地石炭系层序地层学及岩相古地理研究[J].石油地球物理勘探,1995,30(4):533-545.
[7] 马立祥,万静萍,王世凤,等.塔里木盆地早石炭世沉积体系域的基本特征[J].石油实验地质,1996,18(2):168-173.
[8] 樊太亮,刘金辉,韩革华,等.新疆塔里木盆地北部应用层序地层学[M].北京:地质出版社,1997.27-156.
[9] 邓宏文,王洪亮,李熙吉吉.层序地层基准面的识别,对比技术及应用[J].石油与天然气地质,1996,17(3):177-184.
[10]樊太亮,吕延仓,丁明华.层序地层体制中的陆相储层发育规律[J].地学前缘,2000,7(4):315-321.
[11]岳建华,韩燕英,虎北辰.塔里木盆地艾协克地区石炭系盐体成因机制研究[J].新疆地质,1999,17(2):157-164.
[1] 威尔格斯CK(徐怀大,魏魁生,洪卫东译).层序地层学原理(海平面变化综合分析)[M].北京:石油工业大学出版社,1992.49-157.
[2] 李思田,潘元林,陆永潮,等.断陷湖盆隐蔽油藏预测及勘探的关键技术——高精度地震勘探基础上的层序地层学研究[J].地球科学——中国地质大学学报,2002,27(5):592-598.
[3] 陆永潮,赵祖辉,陈平,等.东营凹陷高精度层序地层学研究及在油气勘探新领域中的应用[J].地球科学——中国地质大学学报,2001,26(增刊):105-108.
[4] 林畅松,潘元林,肖建新,等."构造坡折带"——断陷盆地层序分析和油气预测的重要概念[J].地球科学——中国地质大学学报,2000,25(3):260-265.
[5] 林畅松,刘景彦,蔡世祥,等.莺-琼盆地大型下切谷和海底重力流体系的沉积构成和发育背景[J].科学通报,2001,46(1):69-72.
[6] 赵秀岐,张振生,李洪文.塔里木盆地石炭系层序地层学及岩相古地理研究[J].石油地球物理勘探,1995,30(4):533-545.
[7] 马立祥,万静萍,王世凤,等.塔里木盆地早石炭世沉积体系域的基本特征[J].石油实验地质,1996,18(2):168-173.
[8] 樊太亮,刘金辉,韩革华,等.新疆塔里木盆地北部应用层序地层学[M].北京:地质出版社,1997.27-156.
[9] 邓宏文,王洪亮,李熙吉吉.层序地层基准面的识别,对比技术及应用[J].石油与天然气地质,1996,17(3):177-184.
[10]樊太亮,吕延仓,丁明华.层序地层体制中的陆相储层发育规律[J].地学前缘,2000,7(4):315-321.
[11]岳建华,韩燕英,虎北辰.塔里木盆地艾协克地区石炭系盐体成因机制研究[J].新疆地质,1999,17(2):157-164.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心