油藏注气混相驱考虑扩散作用的数值模拟研究  

Numerical simulation study of miscible driving considering dispersion for the gas injection reservoir

作　　者：李菊花[1,2] 杨红梅[2] 刘滨 吴美娥 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,湖北荆州434023 [2]长江大学湖北省油气钻采工程重点实验室,湖北荆州434023 [3]中国石油吐哈油田分公司勘探开发研究院,新疆哈密839009

出　　处：《油气地质与采收率》2010年第6期54-57,共4页Petroleum Geology and Recovery Efficiency

基　　金：中国石油科技创新基金项目(2010D-5006-0202)"低渗-特低渗透油藏注烃气驱多相渗流特征研究"

摘　　要：考虑扩散作用的油藏数值模拟研究可以较准确地预测非均质油藏注气驱动态。基于反映真实物理扩散程度下的地质模型,采用GEM组分模块中考虑扩散作用的数值模拟方法,从注采井距、注气富化度、注气速度等注气因素入手,对油藏注气混相驱不稳定驱替特征进行了数值模拟研究。结果表明,数值模拟要充分考虑扩散作用,若不考虑扩散作用,计算出的油藏注气混相驱采收率则被高估了6%～10%。在已知物理扩散程度后,选择富化程度适合的注入气、合理的注气速度,以及部署合理注采井网是设计油藏注气方案时要考虑的因素。The numerical simulation considering the dispersion may enhance the accuracy of predicting the gas injection performance in the het-erogeneous reservoir.Based on the geological model that is indicative of the true physical dispersion,and adopting the numerical simulation method,that is,tbe GEM component module considering the dispersion,the unstable displacement characteristics on the miscible driving reservoir that is gas injected are studied after taking into account of the injection factors such as well distance,gas enrichness,and injection rate.It is important to take fully into account of the dispersion factor when the development project of gas injection is designed.The recovery factor calculated by the numerical simulation without considering the dispersion is overestimated by 6% -10%.Provided that the physical dispersion is known,the suitable gas injection ratio,reasonable gas injection rate,and op-timized well pattern are the key factors for gas injection design.

关 键 词：扩散作用 注气 混相驱 富化气 组分模型 

分 类 号：TE357.42[石油与天然气工程—油气田开发工程]