THE DISTRIBUTED CHARACTERISITIC OF MIDDLE JURASSIC BUQU FORMATION CARBONATE SOURCE ROCK IN MIDWEST AREA OF NORTH QIANGTANG DEPRESSION
-
摘要: 依据典型剖面实测和辅助对比剖面观测,结合大量系统样品的测试分析,认为羌塘盆地北羌塘坳陷中侏罗统布曲组主要由一套厚度巨大的半局限潟湖相泥晶灰岩、泥质灰岩和潮坪相颗粒灰岩、膏盐岩、泥页岩等组成。碳酸盐岩生油岩主要为潟湖相暗色泥晶灰岩、泥质灰岩及泥灰岩。生油层在纵向上主要产于布曲组下段和上段;横向上具有从坳陷内部到坳陷边缘生油岩厚度逐渐减薄、有机碳含量变差的特点。布曲组生油层的分布特征明显受沉积相和海平面升降变化的控制。该分布特征的研究对评价盆地布曲组生油前景,寻找主要生油坳陷等都具有重要意义。Abstract: According to the typical section measured and the auxiliary correlation section observation,as well as massive system samples data analysis,we thought that the Middle Jurassic Buqu Formation in the North Qiangtang Depression is mainly composed of a set of thickness huge semi-restricted lagoon facies micrite,marl and the tidal flat grain limestone,the gypsolith,the mudstone and so on.The carbonate source rocks mainly is the lagoon facies dark color micrite and the marl.The source bed in on longitudinal mainly delivers its lower segment and the upside;on crosswise from the depression interior to the depression edge,source rock thickness attenuates gradually and the organic carbon content variations characteristic.The source bed distribution characteristic of the Buqu Formation is controlled by the sedimentary facies and the sea level fluctuation change obviously.Its distributed characteristic have the vital significance to appraise uncooked oil prospect and seek the main uncooked oil depression.
-
Key words:
- carbonate source /
- rocks /
- Buqu Formation /
- Middle Jurassic /
- North Qiangtang Depression /
- Qiangtang Basin
-
[1] 刘家铎,周文,李勇,等.青藏地区油气资源潜力分析与评价[M].北京:地质出版社,2007:78-79,113-115. [2] 王剑,谭富文,李亚林,等.青藏高原重点沉积盆地油气资源潜力分析[M].北京:地质出版社,2004:158-160,178-181. [3] 赵政璋,李永铁,叶和飞,等.青藏高原羌塘盆地石油地质[M].北京:科学出版社,2001:174-175,348-351. [4] 罗建宁,谢渊,王小龙,等.羌塘盆地石油地质条件与初步评价[J].沉积与特提斯地质,2003,23(1):1-12. [5] 秦建中.青藏高原羌塘盆地油气资源潜力分析[J].石油实验地质,2006,28(6):566-573. [6] 南征兵,李永铁,郭祖军.羌塘盆地油气显示及油源对比[J].石油实验地质,2008,30(5):503-507. [7] 费宝生,刘建礼,陆艳芬.羌塘盆地油气勘探前景展望[J].海相油气地质,2006,11(4):13-21. [8] 王剑,付修根,陈文西,等.北羌塘沃若山地区火山岩年代学及区域地球化学对比:对晚三叠世火山-沉积事件的启示[J].中国科学D辑:地球科学,2008,38(1):33-43. [9] 王剑,汪正江,陈文西,等.藏北北羌塘盆地那底岗日组时代归属的新证据[J].地质通报,2007,26(4):404-409. [10] 付修根,王剑,汪正江,等.藏北羌塘盆地菊花山地区火山岩SHRIMP锆石U-Pb 年龄及地球化学特征[J].地质论评,2008,54(2):232-242. [11] 赵政璋,李永铁,叶和飞,等.青藏高原海相烃源岩层的油气生成[M].北京:科学出版社,2000:211. [12] 杜佰伟,陈明.羌塘盆地上侏罗统索瓦组烃源岩分布特征及远景分析[J].石油实验地质,2008,30(2):174-178. [13] 罗建宁,雍永源,贾宝江,等.羌塘盆地西区综合地质工程研究报告[R].[保存单位不祥],1997:241. -
点击查看大图
计量
- 文章访问数: 1329
- HTML全文浏览量: 39
- PDF下载量: 822
- 被引次数: 0
下载:
苏公网安备32021102000780号