牛东马18区块注水试验分析

Analysis of Water Injection Test in Block Niudong Ma-18

注水开发对于砂岩类油藏是一项成熟的补充能量的开发技术,裂缝对火山岩油藏注水开发效果影响较大,牛东火山岩油藏储集层非均质性严重,针对火山岩油藏油井产量高低分布不均、递减快、地层压力下降速度快,衰竭式开采采收率低,为提高对火山岩油藏开发的认识,减缓地层压力的降低,提高牛东区块的采收率,通过对牛东注入水的水驱方向,驱替效率及裂缝对注水开发的影响等问题的研究,分析牛东区块注水能力,提出建议,为牛东后期注水开发提供参考。

Waterflooding is a mature development technique to provide complementary energy for sandstone reservoir. The effect of waterflooding in volcanic reservoir is influenced greatly by fracture. Heterogeneous of reservoirs from Niudong volcanic reservoir are severe. As to the various problems like production of oil wells in volcanic reservoirs is distributed differently and declines quickly, the formation pressure decreases quickly, the recovery ratio of depletion type of drive is low, in order to know more about the development of volcanic reservoir, reduce the formation pressure drop, and enhance oil recovery in this field, we analysis water injection capability in this area through studying the direction of water injection and oil displacement efficiency and effect of fracture on water injection de- velopment, meanwhile, give recommendation. It will provide reference for the later stage of water injection development of Niudong.