特种油气藏2011，Vol.18Issue(6)：76-79,4.
近临界蒸汽驱技术在低渗透油藏中的应用
摘要
Abstract
The low - permeability reservoir in Daqing Chaoyanggou oilfield has the problem of low injection - production capability during water flooding process. This paper studies the mechanism of enhancing oil recovery by steam flooding, the injection - production capability of different injected media, the effect of fracture system on steam sweep efficiency, and the optimal parameters of well pattern, spacing, steam injection and production for low permeability fractured reservoirs through laboratory experiment, reservoir engineering analysis and numerical simulation. The study shows that the injected steam in low permeability reservoir is different from that in heavy oil reservoir. The steam is in a near - critical state of high temperature, high pressure, high enthalpy, low specific volume, and low steam quality. It can significantly reduce oil viscosity, alter rock wettability, enhance oil distillation ratio, reduce threshold pressure gradient, and greatly improve production performance of steam flooding. At present, steam injection pilot test has been carried out for 3 well groups and achieved remarkable effect.关键词
蒸汽驱/近临界/低渗透油藏/裂缝/提高采收率/数值模拟/注水Key words
steam flooding/ near critical/ low permeability reservoir/ fracture/ enhanced oil recovery/ numerical simulation/ water flooding分类
能源科技引用本文复制引用
赵欣,贾娜,周百鸣..近临界蒸汽驱技术在低渗透油藏中的应用[J].特种油气藏,2011,18(6):76-79,4.基金项目
大型油气田及煤层气开发国家科技重大专项"泡沫驱、水驱转热采等提高采收率新技术"(2008ZX05010-006) （2008ZX05010-006）
