【作者】 李洪滨；

【导师】 张云峰； 付志国；

【作者基本信息】 大庆石油学院 ， 地质工程， 2008， 硕士

【摘要】 开发实践表明,油田进入高含水期后,三角洲前缘相储层内依然存在一定未动用或含油饱和度较高的部位,这些剩余油的存在主要是由于储层的非均质性造成的。喇萨杏油田的河流-三角洲沉积储层中发育着多种三角洲前缘相体,不但规模形态变化复杂,而且成因类型多样,内前缘相发育有枝状三角洲砂体、过渡状三角洲砂体、坨状三角洲砂体、坨状三角洲河口区沉积砂体;外前缘相发育有主体带发育的稳定外前缘相席状砂、过渡状分布的外前缘相席状砂、不稳定分布的外前缘相席状砂。油田开发地质工作者经过多年的探索研究,对这套大型河流—三角洲沉积储层中的各类三角洲砂体,逐步形成了一套成熟的针对不同类型三角洲砂体非均质描述技术方法,并在不同的开发阶段有效地指导了油田的开发方针的指定。本次研究重点针对萨北油田北三区萨尔图葡萄花油层三角洲沉积储层,研究过程中以岩心及密井网测井曲线为主要手段,以层次分析思想为指导,依据三角洲储层沉积理论,在储层精细对比的基础上,开展了单砂体识别、划分、内部夹层的描述和三维地质模型建立等研究,实现了由大到小,逐级描述三角洲砂体储层非均质性的目的,将储层描述发展到更深层次。目的是在原有储层描述的基础上,进一步深化储层认识,为进一步挖掘这类储层的开发潜力提供更深入的地质依据。更多还原

【Abstract】 The development practices show that there still exists certain unworkable or oil saturation oil in the deltaic front facies reservoir after entering the high water cut stage,which exists because of the heterogeneity of reservoir. Fluvial-deltaic deposits of La-Sa-Xing oilfield develop several deltaic front facies sandbodies,which are not only complex in shape but also many kinds of origins. In inner front facies develops the branched deltaic sandbody,transition deltaic sandbody,mass deltaic sandbody,mass deltaic river mouth depositional sandbody; In outer front facies develop the stable outer front facies sheet sand with developed main body facies belt,transition outer front sheet sand and unstable outer front sheet sand. The geological workers of oil field development have developed a set of description technique of sand body heterogeneity for different types of deltas in studying the large fluvial-deltaic depositional deltaic sandbodies,which has effectively guided the development principle formulation of the oil field in different development stages. The emphasis of the research is to recognize and classify the single sandbody,describe the interbedded layer and establish the 3D geological model aiming at the deltaic reservoir of Putaohua formation in N3 area of Sabei oil field by core and logging curve analysis of dense well pattern based on the deltaic depositional theory and formation correlation. The research realizes the aim of describing heterogeneous reservoir of deltaic sandbody,and bring the reservoir description technique into a high level,providing the geological basis for tapping the potentials of this kind of reservoir.更多还原