杏南开发区点坝侧积体配套挖潜技术研究

发布时间：2018-12-11 18:32

【摘要】：油田开发中后期,大量的油气已被采出,多井、多层高含水,剩余油呈总体上高度分散,局部还有相对富集部位的格局,相当于“水中找油”。尤其在储油丰度高、非均质性极强的点坝砂体内,剩余油分布异常复杂。如何有效确定点坝砂体内的剩余油分布对高含水后期发育点坝砂体的油田而言是开发调整过程中面临的一个难题,对今后此类油田的增储上产具有重要意义。本论文首先利用测井曲线垂向上建立了废弃河道测井相模式,平面上应用“砂顶相对深度法”精细识别了废弃河道,实现了单砂体识别;并以内部建筑结构理论及野外露头资料为指导,研究了曲流型河道点坝识别标志,根据A/S比值的大小,确定了点坝砂体的分布样式,即:在地貌条件相当的情况下,随着A/S比减小,河流迁移和改道频率增大,点坝砂体由点状向鳞片状发展;根据侧积层测井响应特征,确定了单一点坝跨度与活动河道宽度之间的定量关系及点坝内部侧积层角度与河流宽深比的关系;在分析了点坝砂体内部动用状况及剩余油分布特征的基础上,提出点坝砂体剩余油垂向上主要分布在点坝砂体的高含水部位,平面上受特定的井网及开发制度等综合因素的影响,具有高度的复杂性;最终制定了单井个性化治理方案,形成了不同成因点坝砂体的配套挖潜技术。项目研究成果对于指导高含水后期点坝砂体内部剩余分布特征研究及配套挖潜,具有重要的意义。
[Abstract]:In the middle and late stage of oilfield development, a large number of oil and gas have been produced, with multi-wells and multi-layers with high water cut, and the remaining oil is highly dispersed on the whole, and there is a pattern of relative enrichment sites in some areas, which is equivalent to "oil searching in water". Especially in the point bar sand with high oil abundance and strong heterogeneity, the distribution of residual oil is extremely complex. How to effectively determine the distribution of remaining oil in point dam sand is a difficult problem in the process of development and adjustment for the oilfield with point dam sand body developed in the late stage of high water cut. It is of great significance to increase the reservoir and production of such oil fields in the future. In this paper, the logging facies model of abandoned channel is established by vertical log curve, and the abandoned channel is identified by using the relative depth method of sand roof on the plane, and the recognition of single sand body is realized. Based on the theory of internal building structure and field outcrop data, the identification mark of point dam of meandering river channel is studied. According to the size of the ratio of A / S, the distribution pattern of point dam sand body is determined, that is, under the condition of similar geomorphological condition, the distribution pattern of point dam sand body is determined according to the value of A / S ratio. With the decrease of A / S ratio, the frequency of river migration and diversion increases, and the point bar sand body develops from point to scale. According to the characteristics of log response, the quantitative relationship between the span of a single point dam and the width of the active channel and the relationship between the angle of the lateral accumulated layer and the ratio of width to depth of the river in the interior of the point dam are determined. On the basis of analyzing the production status of point dam sand body and the distribution characteristics of remaining oil, it is proposed that the remaining oil of point dam sand body mainly distributes vertically in the high water cut part of point dam sand body. The plane is influenced by the special well pattern and the development system and so on the comprehensive factor has the high complexity; Finally, the individualized treatment scheme of single well is worked out, and the matching technology of tapping potential of different origin point bar sand body is formed. The research results of the project are of great significance to guide the study of the residual distribution characteristics of the sand in the point dam at the late stage of high water cut and to tap the potential.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE327

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