石油钻采工艺2016，Vol.38Issue(1)：105-109,5.DOI:10.13639/j.odpt.2016.01.021
特低渗非均质油藏CO2驱注气速度对采出程度的影响
Inlfuence of CO2 lfooding gas injection rate on recovery percent in extra-low permeability heterogeneous reservoir
摘要
Abstract
Since extra-low permeability and heterogeneous reservoirs are characterized by low porosity, low permeability, low saturation and low production, utilizing conventional water lfooding has big development dififculties and low recovery ratio, while CO2 lfooding can improve the recovery percentage of extra-low permeability and heterogeneous reservoirs signiifcantly. According to the geological and reservoir characteristics of extra-low permeability and heterogeneous reservoirs, and double-layer heterogeneous cores were used to simulate the heterogeneity of reservoirs and displacement experiments under 5 different gas injection rates (1, 2, 4, 8 and 10 mL/min) were designed and completed for systematic analysis of the inlfuence of CO2 lfooding on oil recovery ratio. Research results indicate that the largest recovery ratio increase by CO2 lfooding occurs before CO2 channeling, and as the gas injection rate rises, the advance rate increases and breakthrough time leads forward gradually. Reasonable rate of displacement makes contacting time of CO2 and water and crude oil in the core porosity, and recovery ratio be improved, and thus improves the economic beneifts of the development of extra-low permeability and heterogeneous reservoirs.关键词
特低渗/非均质油藏/CO2驱油/室内实验/注气速度/采收率Key words
extra-low permeability/heterogeneous reservoir/CO2 lfooding/indoor test/gas injection rate/recovery ratio分类
能源科技引用本文复制引用
刘华,李相方,李朋,高云丛,夏俊,于鹏亮..特低渗非均质油藏CO2驱注气速度对采出程度的影响[J].石油钻采工艺,2016,38(1):105-109,5.基金项目
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”（编号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”（编号KF-2010-18）。 （）
