博湖坳陷八道湾组露头、单井层序及沉积学研究
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摘要
主要利用野外露头和钻井(测井)资料,配合使用地震资料的基础上,对焉耆盆地博湖坳陷下侏罗统八道湾组进行了沉积学研究。在建立的焉耆盆地博湖坳陷下侏罗统八道湾组三个三级层序格架的基础上,指出了沉积体系构成上以三角洲-湖湾沼泽相的浅水沉积为主,湖泊水体深度不大且分布范围有限。在研究区识别出的物源体系如下:第一个物源分散体系发育在研究区西南部的巴州煤矿到四十里城地区、北东方向的辫状河三角洲复合体从西南向东北携带沉积物进入研究区中西部发育的"湖湾",且堆积成三角洲朵体;第二个物源分散体系发育在北部凹陷的宝北地区,辫状河三角洲复合体由西北向东南延伸,以湖泊三角洲进入"湖湾"堆积成中小型的辫状河三角洲;第三个物源分散体系发育在本布图地区,辫状河三角洲复合体由西北向东南延伸,进入"湖湾"并堆积成小型的浅水湖泊三角洲;第四个物源在南部凹陷东部,由南向北进积,以发育扇三角洲为主;第五个物源在场浅1井以东,由东向西进积,规模有限。
Based on seismic data, field crop and drilling & logging data, the paper makes a sedimentology study on Bad-aowan formation of lower Jurassic of Bohu depression in Yanqi basin. After establishing three third - order sequence stratigraphic frameworks, the paper points out the sedimentary system composition was mainly shallow system based on delta- lacustrine swamp facies, with shallow water depth and limited distribution range. The identified sedimentary sources in the working area are as the follows; the first disperse source was developed from Ba-zhou coal mine to Sishilicheng area in the southwest. The braided river delta compounds from northeast carries the sediments enter into "lacustrine" which was developed in the middle- west, and accumulated as delta lobe. The second disperse source was developed in Baobei area of the northern depression, and the braided river delta compounds extended from northwest to southeast. The lake delta entered "lacustrine" and accumulated as small- middle type braided river delta. The third disperse source was developed in Benbutu area, and the braded river delta compounds also extended from northwest to southeast. When entering "lacustrine", it accumulated as small type shallow water lake delta. The fourth disperse source lies in the east of the depression and stretched from south to north, with the fan delta as the main form. The fifth disperse source lies in the east of Changqian 1 well, and stretched from east to west, but with limited scale.
Based on seismic data, field crop and drilling & logging data, the paper makes a sedimentology study on Bad-aowan formation of lower Jurassic of Bohu depression in Yanqi basin. After establishing three third - order sequence stratigraphic frameworks, the paper points out the sedimentary system composition was mainly shallow system based on delta- lacustrine swamp facies, with shallow water depth and limited distribution range. The identified sedimentary sources in the working area are as the follows; the first disperse source was developed from Ba-zhou coal mine to Sishilicheng area in the southwest. The braided river delta compounds from northeast carries the sediments enter into "lacustrine" which was developed in the middle- west, and accumulated as delta lobe. The second disperse source was developed in Baobei area of the northern depression, and the braided river delta compounds extended from northwest to southeast. The lake delta entered "lacustrine" and accumulated as small- middle type braided river delta. The third disperse source was developed in Benbutu area, and the braded river delta compounds also extended from northwest to southeast. When entering "lacustrine", it accumulated as small type shallow water lake delta. The fourth disperse source lies in the east of the depression and stretched from south to north, with the fan delta as the main form. The fifth disperse source lies in the east of Changqian 1 well, and stretched from east to west, but with limited scale.
引文
1车自成,刘良,罗金海．中国及其邻区区域大地构造学[M]．北京:科学出版社,2002．20-100
2刘林玉．焉耆盆地中生代原型盆地沉积特征与盆地边界的确定[D]．博士论文,兰州:西北大学,2003
3王华,肖军,崔宝琛等．露头层序地层学研究方法综述[J]．地质科技情报,2002,21(4):15-22
4 Miall A D, Reservoir heterogeneities in fluvial sandstone: Lessons from outcrop studies [J]. AAPC Bulletin,1988,72(6) :682-697
5于炳松．新获塔里木盆地北部古生代层序地层及沉积学研究[J]．现代地质,1994,8(3):333-334
6孙龙德．塔里木含油气盆地沉积学研究进展[J]．沉积学报,2004,22(3):408-16
7郭召杰,张志诚,钱祥麟．塔里木东北缘的一个早-中侏罗世拉分盆地——焉耆盆地[J]．地学前缘,1995,2 (3-4):255-256
8邱荣华,陈文礼,林社卿等．焉耆盆地中生界层序地层和沉积体系分析[J]．地球科学(中国地质大学学报), 2001,26(6):615-620
9王华,赵忠新,陆永潮等．焉耆盆地博湖坳陷侏罗系层序格架及沉积学特征[J]．中南大学学报(自然科学版),2006,37(增刊1):42-46
10袁政文,何明喜,宋建华等．新疆焉耆挤压逆冲型残留盆地与油气勘探[J]．石油实验地质,2004,26(1):11- 16
11田纳新,李军营,李永林等．焉耆盆地油田水与油气聚集保存的关系[J]．河南石油,2002,16(4):5-7,10
12孙峥嵘,周建文．郭海燕等．焉耆博南凹陷储层特征及含油气性研究[J]．河南石油,2003,17(5):13-15
2刘林玉．焉耆盆地中生代原型盆地沉积特征与盆地边界的确定[D]．博士论文,兰州:西北大学,2003
3王华,肖军,崔宝琛等．露头层序地层学研究方法综述[J]．地质科技情报,2002,21(4):15-22
4 Miall A D, Reservoir heterogeneities in fluvial sandstone: Lessons from outcrop studies [J]. AAPC Bulletin,1988,72(6) :682-697
5于炳松．新获塔里木盆地北部古生代层序地层及沉积学研究[J]．现代地质,1994,8(3):333-334
6孙龙德．塔里木含油气盆地沉积学研究进展[J]．沉积学报,2004,22(3):408-16
7郭召杰,张志诚,钱祥麟．塔里木东北缘的一个早-中侏罗世拉分盆地——焉耆盆地[J]．地学前缘,1995,2 (3-4):255-256
8邱荣华,陈文礼,林社卿等．焉耆盆地中生界层序地层和沉积体系分析[J]．地球科学(中国地质大学学报), 2001,26(6):615-620
9王华,赵忠新,陆永潮等．焉耆盆地博湖坳陷侏罗系层序格架及沉积学特征[J]．中南大学学报(自然科学版),2006,37(增刊1):42-46
10袁政文,何明喜,宋建华等．新疆焉耆挤压逆冲型残留盆地与油气勘探[J]．石油实验地质,2004,26(1):11- 16
11田纳新,李军营,李永林等．焉耆盆地油田水与油气聚集保存的关系[J]．河南石油,2002,16(4):5-7,10
12孙峥嵘,周建文．郭海燕等．焉耆博南凹陷储层特征及含油气性研究[J]．河南石油,2003,17(5):13-15
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