库车坳陷依南2气藏油气运移路径及充注特征  

Hydrocarbon Migration Pathway and Charging Characterization of Yinan-2 Gas Reservoir in Kuqa Depression

作　　者：范俊佳[1,2,3,4] 潘懋[1] 周海民[2] 柳少波[2,3,4] 卓勤功 郑永平[2,3,4] 

机构地区：[1]北京大学地球与空间科学学院,北京100871 [2]中国石油勘探开发研究院,北京100083 [3]中国石油集团盆地构造与油气成藏重点实验室,北京100083 [4]提高石油采收率国家重点实验室,北京100083

出　　处：《北京大学学报（自然科学版）》2014年第3期507-514,共8页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家油气重大专项(2011ZX05003);中国石油天然气集团公司重大科技项目(2011-0203A)资助

摘　　要：在流体包裹体观测、测井曲线及依南2气藏综合地质资料分析的基础上,利用定量荧光技术分析库车坳陷依南2气藏26块砂岩样品的荧光光谱特征,揭示该气藏油气运移路径及油气充注特征。研究表明,依南2气藏经历了早期原油充注、原油泄漏与晚期天然气充注过程。由储层砂岩样品的QGF定量荧光光谱响应与烃类包裹体分析,推测依南2气藏早期油源来自深部三叠系泥岩层与侏罗系煤层,通过垂直向上运移,古油藏经历构造破坏,发生泄漏,未形成具有规模的古油藏。QGF-E荧光光谱响应表明,天然气运移路径亦为垂直向上运移,依南2气藏储层4750 m以下可能为大面积含气区。TSF荧光指纹图揭示,依南2气藏具有混源特征,气源由侏罗系煤层和三叠系湖相泥岩烃源岩共同贡献。In order to reveal hydrocarbon migration pathway and charging history of Yinan-2 gas reservoir in Kuqa Depression, 26 sand samples from well Yinan-2 were tested by using of Quantitative fluorescence techniques and fluid inclusions observation method based on well log curves and comprehensive geological data analysis. It is indicated that the Yinan-2 gas reservoir experienced oil charging of early stage, oil leakage and gas charging in late stage. Early oil accumulation of Yinan-2 gas reservoir may come from Jurassic coal bearing formation and Triassic lacustrine mudstone formation according to the quantitative grain fluorescence responds of sandstone samples. Current natural gas accumulation was migrated vertically from deep part, and the area below 4750 m might be an extensive and continuous gas-bearing area based on the analysis of quantitative grain fluorescence on extracts of sandstone samples. Besides, total scanning fluorescence fingerprint indicates that the current natural gas accumulation is derived from Jurassic coal seams and Triassic lacustrine mudstone formation.

关 键 词：定量颗粒荧光 荧光光谱 运移路径 充注史 依南2气藏 

分 类 号：P618.13[天文地球—矿床学]