Augmented Injection Technology Research For High Pressure Water Injection Zone Of Low Permeability Reservoir

In this paper, the feather of the target area under injection well is analysed. Physical property, reservoir microscopic nature is analysed evaluated, then micro and macro difference between normal injection wells with under injection wells is calculated to get the reason of under injection.Based on the principle of the mature augment injection technology, the main experiment and application of injection are studyed, including fracturing, acidizing, electronic pulse stimulation and so on, to find the suitable augmented injection technology for the target region.Based on the research, the Geng271district physical property is poor, matrix permeability is low, closure stress is high, natural fracture is not developed or not easy to open, that led to high pressure threshold.of water injection. Ground pressure process cost large one-time investment and it is not applicable in the old block; The effect of conventional acidizing, electronic pulse and mini fracturing is not ideal because it is greatly affected by the reservoir properties; surface active agent increasing injection process has short effect; composite injection process needs further study; comprehensive analysis confirm that the retarded acid at the block has potential promotion.