中国石油大学学报（自然科学版）2017，Vol.41Issue(3)：98-104,7.DOI:10.3969/j.issn.1673-5005.2017.03.012
高凝油藏中蜡沉积对开发效果的影响
Impact of wax deposition on development of high pour-point reservoirs
摘要
Abstract
There has been lack of research on the effect of solid wax deposition to formation damage.To address this issue,solid deposition modeling was conducted to simulate the process of wax deposition in reservoirs with high pour-point oils,in which the impact of solid deposition on porosity and permeability was considered.The relationship between the amount of wax deposited and the induced porosity and permeability change was derived.The effect of injected water temperature (25-65 ℃) on the distribution of water saturation,and the reduction of porosity and permeability was investigated.The simulation results show that cold water injection can reduce the reservoir temperature to below the pour-point of oil.One year injection of the produced water (45 ℃) can also affect the reservoir temperature in near wellbore region up to 30 m,in which the amount of the cumulative wax deposited can be accounted for about 4％ of the pore volume.The gradual reduction of reservoir temperature can affect the water saturation front and cause the ratio of real permeability to initial permeability dropped from 93％ to 72％.With continuous water injection,the increasing trend of deposited wax volume and permeability reduction near wellbore can be reduced and it spreads to the deep reservoir gradually.关键词
高凝油/蜡沉积/流固耦合/数值模拟/有限差分Key words
high pour-point oil/wax deposit/fluid-solid coupling/numerical simulation/finite difference分类
能源科技引用本文复制引用
崔传智,刘力军,李志涛,姚荣华,许鹏,金超林,高丽..高凝油藏中蜡沉积对开发效果的影响[J].中国石油大学学报（自然科学版）,2017,41(3):98-104,7.基金项目
国家重大科技专项(2016ZX05011-002) （2016ZX05011-002）
山东省自然科学基金项目(ZR2011EL034) （ZR2011EL034）
