储层构型对聚驱后剩余油分布影响研究

发布时间：2018-05-07 04:39

  本文选题：储层构型 + 单砂体　； 参考：《东北石油大学》2015年硕士论文

【摘要】：在高含水开发时期,剩余油挖潜难度增大,三次采油得以广泛应用,但由于陆相储层具有较强的非均质性,不同成因砂体因形成环境不同,其厚度、岩性、物性、非均质性各异,加之长期的注水开发导致油水关系极为错综复杂,剩余油分布异常复杂。开展精细储层构型研究,分析储层构型对聚驱后剩余油分布的影响,对确定剩余油分布规律和富集特点,有针对性采取不同剩余油挖潜方法,提高采收率具有重要的意义。本文在高分辨率层序地层学、储层地质学、油藏工程等理论指导下,综合岩心、测井、地质以及开发动态等资料,将喇北东块GⅡ1-GⅡ18小层204口井细分为21个沉积时间单元。确定研究区目的层发育三角洲前缘环境。先对构型单元进行详细研究,进而分析了不同构型单元内部特征,最后分析了构型单元对聚驱后剩余油的影响。聚合物驱后,反韵律油层内剩余油较正韵律油层更少。但从聚合物驱替效果来看,聚驱对正韵律岩心的改善效果最好,对复合韵律岩心的改善效果次之,对反韵律岩心的改善效果最差。从剩余油分布位置上看,聚驱后,剩余油仍然主要集中在物性较差部分。构型单元物性越差、厚度越大剩余油越多。在以上研究基础上,提出了聚驱后剩余油挖潜的主要方向。不同构型单元内的剩余油挖潜方式不同:水下分流河道上部的剩余油,可利用细分注水,封堵高渗含水层等方法;相对高渗透、厚层的分流河道和河口坝,可利用不同批次聚驱或三元、二元、多元泡沫等方式予以挖潜;席状砂构型单元挖潜时应选择合适分子量的聚合物并进行细分层注聚开采;远砂坝、分流间湾物性最差,孔喉最细小,可以考虑采用压裂等方式同时配合周期注水等方式予以开采。
[Abstract]:In the period of high water cut development, it is more difficult to tap the potential of remaining oil, and the tertiary oil recovery is widely used. However, due to the strong heterogeneity of continental reservoir, the thickness, lithology and physical properties of different genetic sandbodies are different due to their different forming environments. Heterogeneity and long-term waterflooding lead to complicated oil-water relationship and complex distribution of remaining oil. The study of fine reservoir configuration and the analysis of the influence of reservoir configuration on the distribution of remaining oil after polymer flooding are of great significance in determining the distribution law and enrichment characteristics of remaining oil and taking different methods to tap potential of remaining oil in order to improve oil recovery. Under the guidance of high resolution sequence stratigraphy, reservoir geology, reservoir engineering and so on, this paper subdivides 204 wells in G 鈪，

本文编号：1855475