超低渗油藏注气采油可行性实验  

Experimental study of feasibility of gas injection recovery in ultra-low permeability reservoirs

作　　者：孙黎娟[1] 吴凡[2] 刘社芹[2] 张素芹[2] 荣桂花[2] 王瑞华[2] 

机构地区：[1]中国石油大学(华东),山东东营257061 [2]中原油田分公司勘探开发科学研究院

出　　处：《河南石油》2005年第3期38-39,i003,共3页Henan Petroleum

摘　　要：超低渗油藏由于孔喉极细,即使高压注水,也难以保持注采平衡,应考虑注气的可行性。文中进行了水驱油和氮气驱油试验,以比较驱替效果,探究超低渗油藏的驱替机理。结果表明,对于小于1×10-3μm2的超低渗岩心,气驱比水驱效果好,气驱平均采收率为27.9%,水驱平均采收率为24.1%。说明注气具有一定的优越性。To maintain a balanced injection and production rate in ultra - low permeability reservoirs is very difficult even when applying a very high pressure water injection, due to the very fine pore throats, therefore the feasibility of gas injection should be considered. Water - drive and nitrogen - drive experiments are performed to compare their displacement effects and study the displacing mechanism of ultra - low permeability reservoirs. In core with an ultra - low permeability of 1×10-3μm2 , the average recovery factor of gas drive is 27. 9% , 3. 8 percentage points higher than the 24. 2% of water drive, indicating that gas drive is advantageous to some extent.

关 键 词：超低渗油藏 注采平衡 注气 可行性 水驱油 气驱油 采收率 

分 类 号：TE311[石油与天然气工程—油气田开发工程]