东营凹陷新立村油田稠油成因  

Origin of Heavy Oils in Xinlicun Oilfield, Dongying Sag

作　　者：刘华[1] 蒋有录[1] 龚永杰[1] 周艳[1] 

机构地区：[1]中国石油大学地球资源与信息学院,山东东营257061

出　　处：《新疆石油地质》2008年第2期179-181,共3页Xinjiang Petroleum Geology

基　　金：国家"十五"科技攻关项目;济阳坳陷古近系沉积体系与油气运聚机理研究(2001BA605A09)资助

摘　　要：东营凹陷东部的新立村油田具有正常原油与稠油相伴生的分布特点,稠油多分布于距油源较远的构造高部位,与正常原油呈半环状分布。综合流体性质、原油族组成、地球化学特征等分析,认为该区稠油油藏的后期保存条件较好,微生物降解作用轻微,具有半咸水-咸水湖相烃源岩生成的低熟油特征;稠油多属于原生稠油,低成熟度及长距离运移是导致原油稠化的主要因素。稠变的原油降低了对断层侧向封堵性的要求,利于成藏;此外,稠油作为一种封堵类型,为该区后续油气的成藏起到了重要的封堵作用。Xinlicun oilfield located in eastern Dongying sag is characterized by normal crude associated with heavy oil which occurs mostly in structural high far from oil source. The analyses from fluid property, crude composition and geochemistry show that the heavy oil reservoir is in good condition of preservation in late period, slight microbial degradation, featuring low-maturity oils in haft salt-saltwater lacustrine source rocks. The original heavy oil is resulted from low maturity and long distance migration, which reduces the lateral seal to faults and is favorable for forming reservoir. Moreover, as a kind of plugging zone, the heavy oil in this area plays an important plugging role in successively hydrocarbon accumulation.

关 键 词：东营凹陷 稠油 低成熟油 油气运移 

分 类 号：TE112.111[石油与天然气工程—油气勘探]