研究克拉玛依油田储层孔隙结构特征与驱油效率之间的关系。油田六中区克下组储层按孔隙结构特征分为四类：Ⅰ类孔隙结构储层结构成熟度较高,低渗岩心孔喉分布曲线呈单峰偏粗态,驱油效率为62%;Ⅱ类孔隙结构储层孔喉分布曲线呈多峰或多峰偏粗态,驱油效率为50.5%;Ⅲ类孔隙结构储层孔喉分布曲线呈多峰偏细态,驱油效率为42.54%;Ⅳ类孔隙结构储层孔喉分布曲线形态为单峰偏细态,驱油效率为35%。%The reservoir pore structure is the critical element which has great effect on oil displacement efficiency.Through various core analysis and tests,the reservoir of lower Karamay formation in the Middle District No.6 of Karamay oilfield has been classified into four categories.The features of pore configuration and oil displacement efficiency of each type are analyzed in this paper.The typeIreservoir has relatively high textural maturity.Low permeable core in this type has the highest oil displacement efficiency about 62%.The oil displacement efficiency of the type II reservoir varies in a large range,the average value is about 50.5%.The oil displacement efficiency of the type III reservoir varies in a large range,the average value is about 42.54%.Its average pore throat radius is relatively short.The pore throat distribution curve of the type IV reservoir is single peaked and relatively thin state and its oil displacement efficiency is 35%.
展开▼
