摘要
针对目前CO2-ECBM技术缺乏有效注入参数优化方法的问题,研究不同CO2相态下的吸附置换能力。运用井筒多相管流的计算方法,以沁端区块为研究对象,进行CO2-ECBM注入时机、注入速度以及注入压力等注入参数的优化研究。研究表明:区块开发中后期地层压力下降后再实施CO2-ECBM措施效果更好;在区块气温变化范围内,最大CO2注入压力为2.5MPa,夏季可适当提高,但不得高于3 MPa;区块最大CO2注入速度为50 t/d。优化后的注入参数将对该区块CO2-ECBM的顺利实施具有指导意义。
The adsorption-displacement capacities of different CO2 phases were identified to compensate the shortage of effective injection parameters optimization methods in CO2-ECBM currently. Based on Qinduan coal gas block,well-bore multi-phase flow calculation was applied to optimize the injection timing,injection rate,injection pressure and other parameters. Research indicates that better performance can be gained when the CO2-ECBM treatment is implemented after the pressure decrease in middle land late development periods. In the block air temperature range,the maximum CO2 injection pressure is 2. 5 MPa,which can be increased appropriately with the upper limit of 3 MPa. The maximum CO2 injection rate is 50 t /d. The optimized injection parameters will provide references for the smooth implementation of CO2-ECBM treatment in this block.
出处
《特种油气藏》
CAS
CSCD
北大核心
2014年第5期115-118,157,共4页
Special Oil & Gas Reservoirs
基金
国家"863"计划课题"CO_2驱油的油藏工程设计技术研究"(2009AA063402)
关键词
煤层气藏
注入参数优化
采收率
沁端区块
coal gas reservoir
CO2-ECBM
injection parameters optimization
recovery factor
Qinduan block
