克拉玛依油田七中区石炭系油藏注水开发特征研究

克拉玛依油田七中区石炭系油藏为构造裂缝和溶蚀孔洞的火山岩基岩油藏,受构造和裂缝控制。储层主要岩性为安山岩玄武岩。油藏采用衰竭式开采递减大、采收率低。由于油藏裂缝发育、非均质性极强,注水开发水淹水窜严重,多数井长期注水不见效。该油藏注水开发已经26年,注水补充地层能量,油藏递减得到减缓;通过研究油藏地质特征,油水分布和运动规律,开展多方式精细注水,油藏目前采出程度达到18.71%,开发取得成效。

RESEARCH ON KARAMAY OILFIELD SEVEN CENTRAL CARBONIFEROUS RESERVOIR WATER INJECTION DEVELOPMENT CHARACTERISTIC

Karamay Oilfield District Seven Central Carboniferous reservoir is a fractured role in the control of tectonic fractures and caverns of the volcano rock basement reservoir,reservoir lithology is mainly andesite basalt.Reservoirs are using depleted decrease greatly,with low recovery rate.As a result of reservoir fracture development with strong heterogeneity,flooding water channeling is serious,so it is in vain by flooding in the majority of wells for a long time.Water injection has been done in this oil reservoir for 26 years.Supply of reservoir energy by flooding mirigates decrement.Through the study of reservoir distribution and movement laws,water injection has been done in various ways,and the recovery degree reaches 18.71%,the development obtains good results.