油气地质与采收率2011，Vol.18Issue(5)：40-43,4.
适用于低渗透高矿化度油藏的新型聚合物弱凝胶驱油体系——以长庆油田陇东侏罗系油藏为例
摘要
Abstract
In response to the low permeability, high formation water salinity features of Longdong Jurassic reservoir in Changqing oilfield, the applicable polymer micro gel displacement system has been developed and its properties are evaluated through the experiments with respect to rheology, salt resistance, shearing resistance and core displacement. These results indicate that: at 50 ℃, apparent viscosity of 1 500 mg/L polymer increases from 29.61 mPa · s to 51.96 mPa · s; the higher saline water salinity, the lower system viscosity, but once the salinity reaches 25 000 mg/L, the viscosity will be kept above 10 mPa · s; core displacement rate maintains at 0. 1-0. 8 cm/min, viscosity retention is no less than 75% ; and the displacement efficiencies of the core with permeability of 450×l0-3μm2 and 63.7×10-3 μm2 increase by 14.29% and 16.67% respectively compared with the water injection. Polymer micro gel flooding pilot has been implemented in 6 well groups of H2 district in HC, water adsorption thickness increases from 17.4 m to 19. 5 m, recoverable degree of water flooding increases from 66.2% to 67.4% , water injection pressure increases by 5. 1 Mpa, with 20 wells enhanced by polymer injection and total oil increment of 3 447 t. This study demonstrates that polymer micro gel flooding is an effective method to ameliorate the low permeability reservoir decline, and improve water injection profile and decrease the producer's water cut.关键词
提高采收率/聚合物弱凝胶驱油体系/性能评价/驱油效果/低渗透油藏Key words
KOR/polymer weak-gel system/performance evaluation/displacement effect/low permeability reservoir分类
能源科技引用本文复制引用
高春宁,李文宏,武平仓,余光明,徐飞艳,刘蕾..适用于低渗透高矿化度油藏的新型聚合物弱凝胶驱油体系——以长庆油田陇东侏罗系油藏为例[J].油气地质与采收率,2011,18(5):40-43,4.基金项目
中国石油天然气集团公司重大科技专项"长庆油田油气当量上产5 000万吨关键技术研究"(2008E-1305). （2008E-1305）
