摘要
致密油藏的开发主要利用储集层原始天然弹性能量,最终采收率一般低于10%.应用空气泡沫驱开发致密油藏,可以补充地层能量以达到提高最终采收率的目的。通过单管岩心和双管岩心实验,研究了空气泡沫驱在致密油藏中的流动特性和驱替效果,考虑了不同影响因素对空气泡沫驱效果的影响。得出最优气液比为3∶1,最优泡沫液段塞为0.05 PV.实例验证表明,空气泡沫驱增油效果明显,15口典型生产井注入前平均月产油198.1 t,注入后为240.0 t,增油幅度达21%;空气泡沫驱控水效果明显,注入前典型生产井平均含水率28.8%,注入后为28.9%,含水率仅增高0.1%.
The original natural elastic energy of reservoirs are main energies for tight reservoir development and the ultimate recovery fac-tor is generally less than 10%. Air foam flooding can replenish energy for tight reservoir development to improve the ultimate recovery fac-tor. Based on experiments with single-barreled cores and double-barreled cores, the paper studies flow characteristics and displacement ef-fect in tight reservoirs by air foam flooding, discusses the influences of different factors on the air foam flooding effect and concludes thatthe optimal gas-liquid ratio is 3:1 and the optimal size of foam liquid slug is 0.05 PV. The results show that the air foam flooding can obvi-ously improve oil production and good water control effect can be gained. Taking 15 typical producers as examples, the average oil produc-tion per month is 198.1 t and 240.0 t before and after injection, respectively, and the oil production is increased by 21%; the average watercut is 28.8% and 28.9% before and after injection, respectively, and the water cut only increases by 0.1%.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2016年第6期697-702,共6页
Xinjiang Petroleum Geology
基金
陕西省科技厅重大专项(2011KTZB-04)
关键词
致密油藏
空气泡沫驱
水驱
驱油效率
提高采收率
单管岩心
双管岩心
tight reservoir
air foam flooding
waterflooding
oil displacement efficiency
EOR
single-barreled core
double-barreled core
