中高渗砂岩油藏水驱后储层参数变化规律  

CHANGED LAWS OF PARAMETERS AFTER WATER FLOODING FOR MEDIUM-HIGH-PERMEABILITY SANDSTONE OIL RESERVOIRS

作　　者：杨满平[1] 张淑婷[1] 刘继霞[2] 孙长红[2] 于成杰[2] 

机构地区：[1]燕山大学石油工程系,河北秦皇岛066004 [2]华北油田分公司第二采油厂地质研究所,河北霸州065700

出　　处：《大庆石油地质与开发》2012年第6期59-63,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金项目资助（50804041）.

摘　　要：通过对岔河集油田取心井岩心的分析，发现水驱对中高渗砂岩油藏储层参数有显著影响：孔隙度和渗透率的值随水驱倍数增加而增大，孔隙度变化幅度较小，渗透率增幅比较明显；初始孔隙度和渗透率值越高的样品，水驱后增幅越明显，这反映注入水沿着大孔道推进，对大孔道的影响最大；水驱后，储层出现面孔率和孑L隙体积增大、喉道直径增大、泥质等填隙物含量降低、排驱压力和饱和度中值压力降低等变化特征；由于水驱后渗流能力增强的大孑L道容易在地层中形成优势渗流通道，注入水沿优势通道推进，影响注入水的波及体积和驱油效率。因此，需要采取深部调驱等措施，封堵已经形成的优势渗流通道，提高注水开发效果。Through the core analyses in Chaheji Oilfield, the parameters are significantly influenced by the water flooding for medium-high-permeability sandstone reservoirs： the porosity and permeability values increase with the multiples of the water flooding, but the former changes a little, and the latter is on the contrary ; the larger primary values are, the more obviously increased after the flooding, this conditions reflect that the injected water drives for- ward along high-capacity pores and channels, thus the influence on the channels are the most obvious; after the flooding, the followings changed are shown ： the increases of surface pore ratio, pore volume and throat radius and furthermore the decreases of the shale and other matrices＂ contents, drainage pressure and saturation median pres- sure; due to the enhancement of the flow ability after ther flooding, the high-capacity channels are prone to result in predominant filtering channels, thus the water can easily advance along the channels, and the swept volume and oil flooded efficiency are finally influenced. Therefore it is necessary to take technical measures of deep profile con- trol and so on to block the generated preferential channels and improve the effects of the water flooding.

关 键 词：砂岩油藏 水驱 储层参数 孔隙度 渗透率 孔隙结构 

分 类 号：TE375.6[石油与天然气工程—油气田开发工程]