原油黏度和注入时机对凝胶调驱效果影响研究  

Experimental study on influences of crude oil viscosity and injection time on polymer gel driving

作　　者：任艳滨[1] 姜维东[1] 张运来[1] 卢祥国[1] 

机构地区：[1]大庆石油学院提高油气采收率教育部重点实验室,黑龙江大庆163318

出　　处：《大庆石油地质与开发》2008年第4期100-102,共3页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国海洋石油(中国)有限公司重点项目(SC07TJ-PJC-017)资助

摘　　要：利用天然油砂填制的均质模型和层内非均质模型模拟海上油田高渗疏松砂岩油藏,在不同原油黏度下进行了Cr3+交联聚合物凝胶调驱效果及其调驱时机对调驱效果影响物理模拟实验。结果表明,层内非均质填砂模型很好地反映了地层的非均质状况,Cr3+交联聚合物能有效地封堵高渗层或高渗透条带,调整吸液剖面,扩大波及范围。随着原油黏度的增加,流度比增大,调驱效果下降,采收率降低。调驱时机对Cr3+交联聚合物调驱效果存在影响,含水率为40%的调驱效果好于含水率为98%的调驱效果。Reservoir homogeneity model and inter layer heterogeneity model packed by natural oil-bearing sand are applied to simulate the offshore high-permeability loose sandstone reservoirs, based on which, physical simulation experiments are done to analyze the effect of Cr^3＋ cross-linked polymer gel driving at different crude oil viscosities and the influences of injection time on the effect. Experimental results indicate that the inter layer heterogeneity model could clearly reflect the heterogeneity of the reservoir and the Cr^3＋ cross-linked polymer could effectively block the high permeability zones or belts with improved fluid enter profiles and enlarged sweeping ranges. With the increment of crude oil viscosity and mobility ratio, the driving efficiency and recovery rate decrease. The injection time have certain influences on Cr^3＋ cross-linked polymer gel driving effect because the driving effect under the situation of 40% water cut is better than that of 98% water cut.

关 键 词：填砂模型 聚合物凝胶 注入时机 原油黏度 调驱效果 物理模拟 

分 类 号：TE357[石油与天然气工程—油气田开发工程]