高油气比井液力混抽增效机理及应用  

Mechanism and Application of Pumping Efficiency Enhancement with Hydraulic Commingling Pumping Method in High Gas-Oil Ratio Wells

作　　者：李根生[1,2] 罗洪斌[1,2] 黄中伟[2] 牛继磊[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东东营257061 [2]中国石油大学(北京)油气资源与探测国家重点实验室,北京昌平102249

出　　处：《石油钻探技术》2008年第6期1-3,共3页Petroleum Drilling Techniques

基　　金：国家自然科学基金项目“高压水射流喷射压裂机理研究”(编号:50774089);中国石化提高采收率先导项目“提高中高油气比油井抽汲效率技术应用”(编号:2002-1)联合资助

摘　　要：分析了影响高油气比井有杆泵泵效的因素及现有措施的有效性，以井筒气液两相流动规律为基础，分析了油气分离和液力混合增效的原理。液力混合增效的原理是通过控制井筒气液两相流的流体力学参数来调节混合物的流态，最终形成流动性最佳的均匀气泡流。研究结果表明，合理的油气分离和改善井筒流动特性是提高高油气比井抽汲效率的有效途径。对于有杆泵采油井，要实现液力混抽增效，须采用三级优化系统。现场应用表明，液力混抽增效技术能起到很好的防气增油作用，泵效平均提高12％～13％。This paper analyzes factors affecting pumping performance of rod pump and efficiency of current measures. Based on laws of gas-liquid two-phase flow, mechanisms of oil-gas separation and hydraulic commingling enhancement are examined. The principle of efficiency enhancement is to adjust the fluid dynamics parameters for the purpose of controlling the gas-liquid two phase flow regime in wellbore to create uniform foam flow which has best flowability. The research results indicate that the reasonable oil-gas separation and the improvement of gas-liquid two phase flow characteristics are the effective ways to enhance the pumping efficiency in high gas-oil ratio wells. Field applications show that hydraulic commingling-pumping technology has improved oil production and pumping efficiency, and the average improvement in pumping efficiency is 12 to 13 percent.

关 键 词：油气比 液力混抽 泵效 多相流动 

分 类 号：TE355.5[石油与天然气工程—油气田开发工程]