压性浅水湖盆沉积体系——以吐鲁番坳陷中下侏罗统为例
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摘要
为了探讨压性浅水湖盆沉积体系的分布规律,运用沉积学理论,通过野外露头考察、钻井岩心观察、岩心薄片鉴定以及大量测井、地震等资料的详细分析,认为吐鲁番坳陷中下侏罗统发育了辫状河、辫状河三角洲、曲流河、曲流河三角洲、扇三角洲和湖泊等6种沉积体系,并发现曲流河-曲流河三角洲体系在中下侏罗统中占有相当的比重.依据层序地层学研究结果,将吐鲁番坳陷中下侏罗统细分为5个三级层序,10个四级旋回.对各旋回发育期的沉积体系展布特征进行了深入研究,总结出压性浅水湖盆有缓坡型和具沉积坡折型2种沉积发育模式,在此基础上预测出3个有利储层发育区,即台北凹陷中部、台北凹陷南部和盆地南部边缘带.
The distribution law of the sedimentary systems in the compressed shallow-lake basin are discussed based on sedimentology and detailed outcrop,core,core thin-section identification,logging and seism data,and it is held that six sedimentary systems are developed in middle—lower Jurassic in Turpan Depression,including braided river,braided-river delta,meandering river,meandering-river delta,fan delta and lake systems.It is also found that meandering river and meandering delta systems account for greater proportion in Middle-lower Jurassic.The Middle-lower Jurassic is divided into five third-order sequences and ten fourth-order cycles according to the research results of sequence stratigraphy.The distribution features of the sedimentary systems in each cycle are analyzed,and it is held that there are two sediment developing patterns of gentle-slope type and deposit slope-break type in the compressed shallow-lake basin.Moreover,three favorable reservoir areas are forecasted and they are the central part of Taibei Sag,the southern part of Taibei Sag and the southern marginal part of the basin.
The distribution law of the sedimentary systems in the compressed shallow-lake basin are discussed based on sedimentology and detailed outcrop,core,core thin-section identification,logging and seism data,and it is held that six sedimentary systems are developed in middle—lower Jurassic in Turpan Depression,including braided river,braided-river delta,meandering river,meandering-river delta,fan delta and lake systems.It is also found that meandering river and meandering delta systems account for greater proportion in Middle-lower Jurassic.The Middle-lower Jurassic is divided into five third-order sequences and ten fourth-order cycles according to the research results of sequence stratigraphy.The distribution features of the sedimentary systems in each cycle are analyzed,and it is held that there are two sediment developing patterns of gentle-slope type and deposit slope-break type in the compressed shallow-lake basin.Moreover,three favorable reservoir areas are forecasted and they are the central part of Taibei Sag,the southern part of Taibei Sag and the southern marginal part of the basin.
引文
[1]袁明生,梁世君,燕列灿,等.吐哈盆地油气地质与勘探实践[M].北京:石油工业出版社,2002.
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[4]张文朝,赵岩,李胜明,等.吐哈盆地扇三角洲沉积特征及油气意义[J].新疆石油地质,1998,19(4):303-308.
[5]张代生,李成明.吐哈盆地台北凹陷沉积体系变迁对油气分布的控制[J].石油与天然气地质,2000,21(1):71-75.
[6]刘林玉,柳益群,李文厚,等.吐哈盆地台北凹陷三角洲沉积与成岩作用[J].石油与天然气地质,2002,23(4):402-406.
[7]姜在兴.沉积学[M].北京:石油工业出版社,2003.
[8]邓宏文,王红亮,祝永军,等.高分辨率层序地层学-原理及应用[M].北京:地质出版社,2002.
[9]樊太亮,李卫东.层序地层应用于陆相油藏预测的成功实例[J].石油学报,1999,20(2):12-17.
[10]林畅松,潘元林,肖建新,等.构造坡折带断陷湖盆层序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):260-267.
[2]纪友亮,冷胜荣,陈丽华.吐哈盆地台北凹陷侏罗系沉积特征研究[J].石油大学学报:自然科学版,1995,19(6):8-15.
[3]吴因业.吐哈盆地侏罗系含煤沉积层序特征研究[J].石油勘探与开发,1995,22(5):35-39.
[4]张文朝,赵岩,李胜明,等.吐哈盆地扇三角洲沉积特征及油气意义[J].新疆石油地质,1998,19(4):303-308.
[5]张代生,李成明.吐哈盆地台北凹陷沉积体系变迁对油气分布的控制[J].石油与天然气地质,2000,21(1):71-75.
[6]刘林玉,柳益群,李文厚,等.吐哈盆地台北凹陷三角洲沉积与成岩作用[J].石油与天然气地质,2002,23(4):402-406.
[7]姜在兴.沉积学[M].北京:石油工业出版社,2003.
[8]邓宏文,王红亮,祝永军,等.高分辨率层序地层学-原理及应用[M].北京:地质出版社,2002.
[9]樊太亮,李卫东.层序地层应用于陆相油藏预测的成功实例[J].石油学报,1999,20(2):12-17.
[10]林畅松,潘元林,肖建新,等.构造坡折带断陷湖盆层序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):260-267.
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