發(fā)布時間：2018-05-07 04:39

  本文選題：儲層構型 + 單砂體��； 參考：《東北石油大學》2015年碩士論文

【摘要】：在高含水開發(fā)時期,剩余油挖潛難度增大,三次采油得以廣泛應用,但由于陸相儲層具有較強的非均質性,不同成因砂體因形成環(huán)境不同,其厚度、巖性、物性、非均質性各異,加之長期的注水開發(fā)導致油水關系極為錯綜復雜,剩余油分布異常復雜。開展精細儲層構型研究,分析儲層構型對聚驅后剩余油分布的影響,對確定剩余油分布規(guī)律和富集特點,有針對性采取不同剩余油挖潛方法,提高采收率具有重要的意義。本文在高分辨率層序地層學、儲層地質學、油藏工程等理論指導下,綜合巖心、測井、地質以及開發(fā)動態(tài)等資料,將喇北東塊GⅡ1-GⅡ18小層204口井細分為21個沉積時間單元。確定研究區(qū)目的層發(fā)育三角洲前緣環(huán)境。先對構型單元進行詳細研究,進而分析了不同構型單元內(nèi)部特征,最后分析了構型單元對聚驅后剩余油的影響。聚合物驅后,反韻律油層內(nèi)剩余油較正韻律油層更少。但從聚合物驅替效果來看,聚驅對正韻律巖心的改善效果最好,對復合韻律巖心的改善效果次之,對反韻律巖心的改善效果最差。從剩余油分布位置上看,聚驅后,剩余油仍然主要集中在物性較差部分。構型單元物性越差、厚度越大剩余油越多。在以上研究基礎上,提出了聚驅后剩余油挖潛的主要方向。不同構型單元內(nèi)的剩余油挖潛方式不同:水下分流河道上部的剩余油,可利用細分注水,封堵高滲含水層等方法;相對高滲透、厚層的分流河道和河口壩,可利用不同批次聚驅或三元、二元、多元泡沫等方式予以挖潛;席狀砂構型單元挖潛時應選擇合適分子量的聚合物并進行細分層注聚開采;遠砂壩、分流間灣物性最差,孔喉最細小,可以考慮采用壓裂等方式同時配合周期注水等方式予以開采。
[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，

本文編號：1855475