原生岩性油藏形成机理新解  

New comprehension on the forming mechanism of primary lithologic oil reservoir

作　　者：苏永进[1] 蒋有录[1] 房新娜[2] 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,山东东营257061 [2]山东胜利职业学院,山东东营257097

出　　处：《油气地质与采收率》2006年第2期35-38,共4页Petroleum Geology and Recovery Efficiency

基　　金：中国石油化工集团公司科研项目"博兴洼陷下第三系沉积体系及成藏规律研究"(P02060)部分成果

摘　　要：为了揭示原生岩性油藏的形成机理,对原生岩性油藏相邻烃源岩的岩心地球化学及地层异常压力进行了分析,认为原生岩性油藏的形成包括烃源岩的排烃和砂岩储集体的聚烃2个相对独立但又彼此联系、相互协调的过程。超压区内烃源岩的排烃方式主要有微裂缝排烃、差异突破压力排烃和断层排烃3种类型,它们具有不同的动力学特征和排烃机制。聚烃过程包含烃类的充注和砂体中水的排出2个能量传递过程,且有各自独立的流动途径和压力系统。只有当排烃过程与聚烃过程协调一致时,原生岩性油藏才能形成。In order to open out the forming mechanism of primary lithologic oil reservoir, core geochemistry and abnormal formation pressure of the adjacent source rocks were analyzed in the primary lithologic oil reservoir. It is considered that the formation of the primary lithologic oil reservoir included two independent relatively but related and harmonious processes of hydrocarbon expulsion of the source rocks and hydrocarbon accumulation of sand reservoir. There were three types of the hydrocarbon expulsion in overpressured region: microfracture, differential breakthrough pressure and fault expulsion. Each of them had different dynamic characteristics and hydrocarbon expulsion mechanism. The hydrocarbon accumulation process comprises two processes of energy transmission - hydrocarbon pouring and water draining in sand body,which had independent flow paths and pressure systems. Only when the process of hydrocarbon expulsion coordinates with the process of hydrocarbon accumulation,will the primary lithologic oil reservoir form.

关 键 词：原生岩性油藏 排烃 聚烃 成藏机理 

分 类 号：TE122.3[石油与天然气工程—油气勘探]