不同非均质性模型中注气方式对气驱油的影响  

The Effects of Injection Patterns on Gas Flooding in Different Heterogeneity Models

作　　者：丁名臣[1] 岳湘安[1] 汪杰[1] 赵海龙[1] 张维易[1] 

机构地区：[1]中国石油大学石油工程教育部重点实验室,北京102249

出　　处：《科学技术与工程》2013年第27期8126-8129,共4页Science Technology and Engineering

基　　金：国家科技重大专项(2011ZX05009-004)资助

摘　　要：分别利用均质和非均质岩心模型,进行了连续气驱和水气交替驱油实验。研究了不同非均质性模型中,注气方式对气驱油效果影响的差异。结果表明,均质模型中水驱后连续注气与水气交替提高驱油效率幅度分别为15.8%和14.9%,注气方式对气驱油效率影响较小;而非均质模型中直接水气交替驱原油采收率为78%;连续注气、间歇注采和周期注气原油采收率分别为41.9%、32.2%和42.3%;水气交替注入原油采收率最高,气体注入方式对气驱原油采收率影响较大。均质模型中,气驱后水气交替驱时,水段塞为主要驱油段塞;而非均质模型中,气驱后水气交替驱时,气体段塞是主要驱油段塞。Using homogeneous and heterogeneous models, gas flooding and WAG flooding experiments were carried out to research the effects of injection patterns on gas flooding in different heterogeneity models. The results show that continuous gas displacement and the WAG displacement after water flooding in the homogeneous models can enhanced the oil displacement efficiency by 15.8% and 14. 9% respectively, and gas injection patterns do not affect gas flooding enormously. In heterogeneous models, the oil recovery of WAG, continuous gas injection, intermittent gas injection and periodic gas injection are 78% ,41.9% ,32.2% and 42.3% respectively, and the WAG have the highest oil recovery, which meanings that the gas injection patterns do affect the gas flooding enormously in heterogeneous models. In homogeneous models, water slug is the main medium to displace the residual oil for the WAG after gas flooding, but in the heterogeneous models it is mainly the gas slug that displaces the residual oil for the WAG after gas flooding.

关 键 词：均质模型 非均质模型 注气方式 水气交替 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]