油气地质与采收率2013，Vol.20Issue(1)：70-73,4.
浅薄层稠油油藏氮气泡沫调驱适应性研究
Flexibility study on nitrogen-foam flooding for shallow-thin heavy oil reservoirs
摘要
Abstract
Due to high viscosity, thin reservoir and the serious situation of steam channeling and overriding, it is urgent for Henan spe-cific oil field to change its development pattern. Based on physical experiments and numerical simulation, the suitability of nitro-gen-foam flooding is studied. As indicated in the experiments, it is beneficial to use foam static comprehensive evaluation index to uni-fy the criteria of foam screening. Under the same condition of steam and foam injection parameters, compared with cold foam flooding, the oil production of unit foaming agent of hot foam flooding stays 24.4 percents higher. In the development of multi-layer co-injection and combined reservoir, start-up pressure of each layer is affected by foam injection pattern and permeability contrast. When injected with cold foam, the start pressure of each layer increases linearly along with the increase of permeability grade. But, for hot foam, this value increases in function of power. Because of permeability divergence, each layer's contribution to the recovery percent is different, and to middle and low level permeability layers, foam has the similar producing degree. The optimized program of nitrogen-foam flood-ing is determined that the appropriate foaming injection mode is slug injection, and on the condition that the steam injection rate is 4.5 t/(d·m) and foaming agent mass concentration of 0.5%, the optimum injection volume is 0.01 PV; the optimum gas(steam)-gas(nitrogen) ratio is 20:1; the optimum production factor is 1.3:1 and the best foam spacing interval is 90 days.关键词
浅薄层稠油/氮气泡沫调驱/渗透率级差/启动压差/采出程度Key words
shallow-thin heavy oil reservoir/nitrogen-foam flooding/permeability contrast/start-up pressure/recovery percent分类
能源科技引用本文复制引用
卢川,刘慧卿,卢克勤,刘程,何封..浅薄层稠油油藏氮气泡沫调驱适应性研究[J].油气地质与采收率,2013,20(1):70-73,4.基金项目
国家科技重大专项"蒸汽驱后稠油油藏提高采收率技术研究"(2011ZX05009-004-05). （2011ZX05009-004-05）
