胜利郑411区块超稠油单相渗流特征试验研究  

Experimental Study on Single Phase Flow in Block Zheng 411 of Shengli Ultra Heavy Oil Reservior

作　　者：孙建芳[1,2] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中国石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《石油钻探技术》2011年第6期86-90,共5页Petroleum Drilling Techniques

基　　金：中国石化油气勘探开发工程技术基础性前瞻性研究项目"稠油热采非达西渗流机理研究"(编号:P08078)部分研究内容

摘　　要：郑411区块沙3段超稠油性质复杂、开采难度大。为了提高沙3段的采收率,研究了其超稠油渗流特征与常规稠油的差别。采用旋转黏度计和原油渗流流变特性测试装置,测定并分析不同温度下超稠油的流变特征,得出郑411区块超稠油牛顿流体与非牛顿流体转化的临界温度为104℃。利用室内试验装置,模拟单相渗流过程,研究了不同温度下超稠油的渗流特征,计算了不同温度下的启动压力梯度。结果表明:超稠油在低于临界温度下表现为非达西渗流特征,分为3个渗流阶段,不同阶段有不同的压力梯度特征和渗流特征;在高于临界温度时表现为达西渗流特征。Some difficulties exist in ultra heavy oil production of Block Zheng 411 due to its complex properties.In order to improve oil recovery rate of such ultra-heavy oil in Block Zheng 411,the differences of seepage flow characteristics between ultra heavy oil and conventional heavy oil were studied.Experiments of rheological properties of the ultra heavy oil under different temperature were done using spin viscometer and fluid flow experimental apparatus.It was found that the transitional temperature between Newton fluid and non-Newtonian fluid is around 104 ℃.The flow characteristics of ultra heavy oil in the single-phase seepage flow process under different temperature were studied through simulation experiments and pressure gradient of flow initiation was obtained.The experimental results indicate that heavy oil belongs to non-Darcy flow below the critical temperature and could be divided into three flow stages under low temperature with different flow initiation pressure gradients and seepage characteristics.Heavy oil belongsto Darcy flow above the critical temperature.

关 键 词：超稠油 流变性 单相渗流 启动压力梯度 郑411区块 

分 类 号：TE312[石油与天然气工程—油气田开发工程]