高渗通道发育特征研究及调剖效果

发布时间：2018-06-07 11:06

  本文选题：大孔道 + 沉积砂体　； 参考：《东北石油大学》2016年硕士论文

【摘要】：随着油田开发的不断深入,储层孔、渗等物性也随之被改造,形成孔道,导致低效或无效循环严重。因此有必要开展储层内部构型及大孔道分布规律研究,进一步认清油水井连通状况和层内剩余油分布规律,为有效治理低效无效循环带和进一步提高一类油层采收率提供理论指导和技术支持。本次通过对南一区中块储层沉积特征、厚油层内部构型和沉积砂体大孔道物性参数特征研究,最终建立了沉积砂体高渗通道识别、划分及表征方法,取得以下成果:一是通过对南一区中块PⅠ2小层两个沉积单元内曲流河道砂体内部的6个点坝砂体进行精细解剖,夹层的平面展布分布形态为同心圆型和扇型两种,夹层的剖面分布形态为上缓中陡下缓;二是在对取心井资料研究分析的基础上,基于井的测井曲线特征建立了河道砂体高渗通道参数PDKD厚与PDKD薄,结合渗透率分布、有效砂体厚度、高水淹厚度等参数建立了大孔道识别方法,并根据其特征划分为四种类型;三是通过对高渗通道在河道单砂体内部的发育特征研究,建立了高渗通道平面表征方法,识别了典型沉积单元河道砂体高渗通道;四是通过对南一区中块低初始粘度调剖7个井组调剖效果分析得出,调剖方向占高升通道连通方向比例大,且调剖有效厚度占总连通有效厚度比例大的井效果好。
[Abstract]:With the development of oil field, reservoir porosity, permeability and other physical properties are reformed, forming pores, resulting in inefficient or ineffective circulation. Therefore, it is necessary to study the internal configuration of reservoir and the distribution law of large pore channels, to further recognize the connectivity of oil and water wells and the distribution law of remaining oil in the reservoir. It provides theoretical guidance and technical support for the effective treatment of inefficient and ineffective cycle zones and the further improvement of oil recovery in a class of reservoirs. Based on the study of sedimentary characteristics of middle block reservoir, internal configuration of thick reservoir and physical parameters of large channel of sedimentary sand body, the method of identifying, dividing and characterizing high permeability channel of sedimentary sand body is established in this paper. The main results are as follows: first, through the fine dissection of six point bar sandbodies inside the meandering channel sand bodies in the two sedimentary units of P 鈪，

本文编号：1990956