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.
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
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
ultra-low permeability reservoir
CO2flooding
parameters optimization
recovery ratio
geological model
numerical simulation
Yaoyingtai oilfield
作者简介
刘华，男，在读博士，高级工程师，1970年出生，主要从事油气田开发工程相关的研究工作。E-mail：lh4861526@sina．com。
