陆相断陷盆地超压系统下的油气运聚——以车镇凹陷车西地区为例  

Hydrocarbon migration and accumulation in overpressure system of continental rifted basins-case study of Chexi area, Chezhen depression

作　　者：宋亮[1] 张营革[1] 牟敏[1] 王楠[1] 张秀娟[1,2] 张鹏[1] 

机构地区：[1]中国石化胜利油田分公司物探研究院,山东东营257022 [2]中国石油大学(北京)资源与信息学院,北京102249

出　　处：《油气地质与采收率》2014年第1期28-32,112-113,共5页Petroleum Geology and Recovery Efficiency

基　　金：中国石化科研攻关项目"济阳坳陷泥页岩油气富集区地震预测技术研究"(P12039)

摘　　要：为进一步探讨陆相断陷盆地超压系统与油气运聚的关系,以车镇凹陷车西地区为例,在明确超压系统分布特征的基础上,对超压系统在影响排烃模式、提供运移动力和决定油气聚集等方面的重要作用进行了研究。结果表明,车西地区的超压系统可划分为弱、中、强超压3层结构,其围绕生烃中心呈环带状分布。研究区超压系统下存在超压内部稳态排烃和超压凸面幕式排烃2种模式,超压是油气初次运移和油气倒灌的主要动力,超压系统的平面分布和纵向配置控制了超压盆地的油气优势运移方向及聚集规模。根据研究成果,建立了陆相断陷盆地超压源离心泵式油气运聚模式,超压系统内部的有利压力配置区、有利泄压区域与超压下部有效储层的合理配置区为油气成藏的潜力区带。In order to further discuss the relationship between overpressure system in continental rifted basins and hydrocarbon accu-mulation, we take the Chexi area of Chezhen depression as an example. Based on definition of the distribution characteristic of overpres-sure system, we analyzed the overpressure system which has made an important contribution to hydrocarbon accumulation, such as in-fluence on hydrocarbon expulsion, force of hydrocarbon migration and location of hydrocarbon accumulation. The result showed that,the overpressure system in Chexi area has three architectures, peripherally distributed and centering the generation center. The re-search of relationship between overpressure system and hydrocarbon accumulation showed that the overpressure system occurs as twohydrocarbon expulsion models, including internal overpressure stable hydrocarbon expulsion and convex overpressure episodic hydro-carbon expulsion. Overpressure is the main migration force for primary hydrocarbon migration and downward migration. In overpressurebasins, the plane distribution and vertical collocation of overpressure control the dominant migratory direction and accumulation scale.Finally, the hydrocarbon accumulation model of overpressure source and centrifugal pump is established, and it is viewed that the favor-able pressure collocation internal overpressure and the reasonable collocation between pressure-released region and available reservoirunder overpressure are the potential areas for hydrocarbon accumulation. The research has not only deeply recognized the law of hydro-carbon accumulation in overpressure system in Chexi area of Chezhen depression, but also offered significance for petroleum explora-tion in other continental rifted basins.

关 键 词：陆相断陷盆地 超压系统 油气运聚 超压内部稳态排烃 超压凸面幕式排烃 车镇凹陷 

分 类 号：TE111.1[石油与天然气工程—油气勘探]