腰英台特低渗油田CO2驱油参数优化研究  

Parameters Optimization of CO_2 Flooding in Yaoyingtai Ultra-Low Permeability Oilfield

作　　者：刘华[1,2] 李相方[1] 李朋 高云丛 夏俊[1] 于鹏亮[1] 

机构地区：[1]中国石油大学(北京),北京102249 [2]东北油气分公司,吉林长春130062

出　　处：《油气井测试》2016年第3期7-11,75,共5页Well Testing

基　　金：国家科技重大专项“西非深水油田注采参数优化及单井产能预测研究"(2011ZX05030-005-04);中国石油化工股份有限公司油气开发重要先导项目“腰英台油田CO2驱油先导试验动态分析及评价”(KF-2010-18)内容

摘　　要：腰英台油田为低孔特低渗透油藏,油井自然产能低,压裂后含水高,无效井和低效井比例大、采油速度低,地层压力下降快,采收率低,急需实施有效的提高采收率技术。CO_2驱油作为三次采油的重要手段,能够显著提高特低渗油藏采收率。从腰英台油田地质模型入手,建立储层三维地质模型,利用数值模拟方法,对腰英台油田CO_2驱油开发的关键参数进行优化。结果表明,合理的注入速度为40-50 t/d,最佳注入量为0.8 HCPV,最优生产井流压6-7 MPa,系统注入压力20 MPa,且在条件允许的情况下,可以停产2月注气恢复压力,同时注入半年后视生产情况补孔采油。Yaoyingtai oilfield is a low porosity and ultra- low permeability reservoir with low natural productivity,high water cut after fractured,low producing wells or non-producing wells taking a high ratio,low recovery rate,formation pressure dropping quickly and low recovery factor,for which some efficient methods to raise recovery factor should be carried on. As an important EOR method,CO_2 flooding can increase recovery significantly. From geological model of Yaoyingtai oilfield,the three dimension geological model is built,and by using numerical simulation method,the key development parameters of CO_2 Flooding in Yaoyingtai are optimized. The results show that 40-50 t / d is the proper gas injection rate,0. 8 HPCV is the optimized cumulative volume,6- 7 MPa is the reasonable BHP,and injection pressure should be 20 MPa. Under specific condition,producers should be shut-in for 2 months during gas injection and after a half year of injection,perforations adding should be taken.

关 键 词：特低渗油藏 CO2驱油 参数优化 采收率 地质模型 数值模拟 腰英台油田 

分 类 号：TE35[石油与天然气工程—油气田开发工程]