孤岛油田西南缘油气运移通道匹配研究
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摘要
近年来为适应我国东部油田中高程度的油气勘探而兴起的强调油气运移通道的勘探理论,取得了突破性的进展,但对于油气运移通道研究中各要素的相互配置及其联合起来对油气运移和聚集所起的关键作用,还缺乏系统的认识。综合应用地质、钻井、测井和地球物理等资料,在系统研究孤岛油田西南缘油气运移通道的类型、组合样式、运移方向、运移动力的基础上,以成藏期油气运移通道的发育及配置为中心,指出断层—输导砂体的时空匹配可定性判断源—藏对应关系;而主干油源断层的断面形态和易形成"地震泵"源的部位联合决定了油气在断面中的优势运移通道及其时空有效性;进而结合区域不整合的空间有效性,进一步确定油气在不同层位的平面分布。将各运移通道要素串联成一个有机的整体,层层推进,从整体上把握油气在不同成藏期的动态运移和聚集过程。
Although the study of hydrocarbon migration pathways has achieved much progress in recent years,there is still lack of integrated systematic research on the configuration of hydrocarbon migration pathways and its effect on migration and accumulation of hydrocarbon.Based on the research of types of hydrocarbon migration pathways and their assemblage patterns,hydrocarbon migration direction and migration dynamics in the southwest part of the Gudao oilfield,this paper mainly deals with the migration pathways and their patterns developed in the reservoir-forming stages.It was found that the time-space configuration of fault and sand layers could qualitatively indicate the corresponding relation from source to pool;while the shape of the fault plane and seismic pumping sources determine both the dominant migration pathway and the effects of oil-source faults.Then in combination with the spatial-effect of regional unconformity we could determine the plane distribution of hydrocarbon in different strata.Finally,all the migration pathways were organized into a system so as to better understand the migration and accumulation of hydrocarbon.
引文
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