Cr3+聚合物凝胶调驱效果及作用机理  

PROFILE CONTROLLING & FLOODING EFFECTDS AND ACTING MECHANISM FOR Cr3+ POLYMER GEL

作　　者：王海涛[1] 

机构地区：[1]大庆油田有限责任公司第三采油厂

出　　处：《大庆石油地质与开发》2014年第4期115-120,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家重大专项“高效深部液流转向与调驱剂机理研究”(2008ZX05010-004)

摘　　要：海上普通稠油油藏具有储层厚度大、非均质性强和岩石胶结强度低等特点,水驱开发效果较差.为了加快油田开发速度和提高原油采收率,以物理化学、高分子材料学和油藏工程为理论指导,以化学分析、仪器检测和物理模拟为技术手段,以渤海某油田储层地质特征和流体为研究对象,开展了Cr3＋聚合物凝胶储层适应性及作用机理研究.结果表明：随储层平均渗透率和渗透率变异系数增加,聚合物凝胶调驱增油效果变好;随聚合物凝胶注入时机提前,聚合物凝胶调驱效果变好;随原油黏度增加,聚合物凝胶调驱效果变差.Offshore common heavy oil reservoirs are characterized by big thickness, strong heterogeneity, low rock cementation strength and so on, so the water flooding effects are rather poorer. In order to speed up the develop- ment and enhance the oil recovery, guided by the following theories i. e. physicochemistry, high-molecule materi- als and oil reservoir engineering, taking chemical analyses, instrument detection and physical simulation as the technical methods, regarding the geological characteristics and fluids as the studying objects for the reservoirs in an oilfield of Bohai Bay, the reservoir adaptability and its acting mechanism of Cr3＋ polymer gel are researched. The results show that with the increase of the average permeability and permeability variation coefficients of the reser- voirs, the oil incremental effects of the profile-controlling and flooding become much better ; with ahead of the time of the injection opportunity, so are the above effects ; on the contrary, with the rise of the oil viscosity, the effects become rather poorer.

关 键 词：海上油田 Cr3+聚合物凝胶 储层适应性 物理模拟 机理分析 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]