准西南车排子凸起西翼侏罗系油气运移方向研究

Study on migration directions of oil and gas of Jurassic in the west of Chepaizi Uplift,Junggar Basin

为进一步明确准噶尔盆地车排子凸起西翼侏罗系油气优势运移方向,通过分析车排子凸起西翼输导要素配置关系,从剖面上初步分析了油气运移路径;通过分析该地区侏罗系地层压力、原油密度、地层水类型、流体势的平面分布规律,在平面上预测车排子凸起西翼侏罗系油气优势运移方向。采用输导体系与成藏动力学研究相结合、剖面与平面运移方向分析相匹配的研究过程,实现对车排子凸起西翼油气在空间内的优势运移路径预测。结果表明:研究区内发育4种输导体系配置类型,即"一"字型、"Z"字型、"之"字型及"多"字型;侏罗系头屯河组油气平面运移大致分为2个主要方向,近WN向及近N向;侏罗系八道湾组油气平面上整体为近N向运移。

I n order to further clarify the Jurassic oil and gas migration direction in the west area of the Chepaizthrough the analysis of transportation system, the authors preliminarily analyzed the oil and gas migration path in profile ; secondly,through the analysis of the plane distribution of the Jurassic oil density, salinity, fluid potential, the Jurassic oil and gas migration direc-tion were analyzed and predicted. Thus,the research process could be achieved by the combination of transportation system and dynam-ics of accumulation analysis, and analyze the migration direction in profile and plane, to achieve the prediction of oil and gas migrationpath in the space. The results show that,there are four kinds of combination type of transportation system, namely ＂a＂ ,Mz＂ ,Mzigzag＂and ＂ comb-like＂ types;the migration directions of oil and gas in Jurassic Toutunhe Formation are near near WN and near N,as well asin Badaowan Formation is near N.