万旸璐,过敏,李仲东,谢云欣

• 1:同济大学海洋与地球科学学院
• 2:中石化石油勘探开发研究院无锡石油地质研究所
• 3:成都理工大学能源学院
• 4:成都理工大学"油气藏地质及开发工程"国家重点实验室

摘要(Abstract)：

通过对鄂尔多斯盆地西南缘彬长地区烃源岩、储层特征、生储盖组合以及运移动力等综合地质条件进行分析,总结延长组长7致密油油藏分布特征及主控因素。结果表明,彬长地区延长组长7烃源岩以优质张家滩油页岩为主,有利储集体主要为三角洲前缘的水下分流河道砂岩,储层物性差,孔隙度平均为8.8%,渗透率平均为0.22×10-3μm2,属于致密砂岩储层。半深湖—深湖沉积环境导致长7储层横向连通性较差,纵向泥岩夹层多,石油在过剩压力作用下以垂向或侧向短距离运移为主,当封盖能力足够时,便在物性较好的致密储层中成藏。鄂尔多斯盆地延长组长7自生自储式油藏的形成和分布主要受烃源岩、储层和盖层三大因素控制,烃源岩的发育控制油藏展布,储层物性及砂体展布和源储接触关系控制着油藏分布层位,而封盖能力对长7致密油藏的分布规模起决定作用。

关键词(KeyWords)： 致密油;成藏条件;控制因素;长7油层组;彬长地区;鄂尔多斯盆地

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“大牛地致密低渗气田低品位储量评价”(编号:2011ZX05045-01-02);; 中国石化华北油气分公司“鄂南延长组泥岩封盖性与断裂及成藏关系研究”(编号:34550000-13-TZ0499-0004)

作者(Author): 万旸璐,过敏,李仲东,谢云欣

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