牛２０油藏是一个构造简单、主力油层分布稳定、渗透率低、原油性质好的高压低渗透低饱和岩性油藏。针对油藏特点，对油层整体压裂改造，弄清了油层诱生裂缝方向，部署了注采井网；合理地选择了注水时机从而及时补充了地层能量；高压注水，由于水质精细过滤，地层吸水性能好，取得了较好的注水开发效果。 Cattle 20 reservoir is a high-pressure, low-permeability and low-saturation lithologic reservoir with simple structure, stable main oil layer, low permeability and good crude oil properties. According to the characteristics of the reservoir, the overall fracturing and reformation of the oil layer is made, the direction of the induced fracture of the oil layer is clarified, the well pattern of injection and production is deployed, the injection timing is reasonably selected, and the stratum energy is replenished in time. Due to the fine water filtration, Good water absorption, and achieved good water injection development effect.