中国石油大学学报（自然科学版）2018，Vol.42Issue(4)：59-66,8.DOI:10.3969/j.issn.1673-5005.2018.04.007
重力稳定气驱判别模型和试验
Gravity assisted gas injection:assessment model and experimental study
摘要
Abstract
In this study, laboratory experiments were conducted to investigate the displacement efficiency and mechanisms of GAGI, and the effects of dip angle, injection rate and oil viscosity on oil recovery were tested.The residual oil distribution after gas displacement and overall oil production were analyzed to reveal the EOR mechanisms of GAGI.A quantified GAGI assessment model (the NGAGInumber) was proposed, in which the geological and operational parameters were considered, such as dip angle, the density defference between the displacement and displaced fluids, oil layer permeability, crude oil viscosity and injection rate.The experimental results show that large dip angle, low injection rate and low oil viscosity can stabilize the gas/oil contact and improve oil recovery, and the residual oil saturation can be less than 10%after gas displace-ment.The experimental and field data indicate that gravity stablized gas injection can be realized when the NGAGInumber is greater than 1.The proposed NGAGImodel can be used as a creterion to assess the stablity and efficiency of GAGI for field project design and operation.关键词
重力稳定气驱/理论判别模型/室内试验/影响因素/提高驱油效率Key words
gravity assisted gas injection model/assessment model/laboratory experiment/influencing factors/improve dis-placement efficiency分类
能源科技引用本文复制引用
任韶然,刘延民,张亮,崔国栋,宫智武,王延永,韩波..重力稳定气驱判别模型和试验[J].中国石油大学学报（自然科学版）,2018,42(4):59-66,8.基金项目
"十三五"国家油气重大专项(2016ZX05056004-003) （2016ZX05056004-003）
