研究了大庆长垣以东的朝阳沟油田、头台油田、榆树林油田的低孔渗砂岩储层裂缝的发育特征及分布规律．其裂缝的产状、规模、分布主要受断裂和构造高部位、砂岩厚度以及埋藏深度的影响．断层附近和构造高点裂缝发育，薄互层砂岩裂缝发育，岩层埋藏越浅裂缝越发育．裂缝对于油田注水开发影响较大，裂缝发育区油井具有较高的初期产能，但也存在过早水淹、越流渗透、水动力封闭边界等不利影响．克服这些不利因素的关键措施是合理布置注水井网和控制注水压力 The developmental characteristics and distribution of fractures in low porosity and permeability sandstone reservoirs in Chaoyanggou, Tantai and Yushulin oilfields east of Daqing Changyuan were studied. The occurrence, size and distribution of fractures are mainly affected by the fractures and high tectonic parts, sandstone thickness and burial depth. Fractures near the fault and structural high point are developed, and the fractures of thin interbedded sandstone are developed. The more shallow the fractures buried, the more developed. The fractures have a great influence on the waterflooding development in the oilfield. The fractured wells have high initial production capacity, but there are also adverse effects such as premature flooding, over-flow infiltration and hydrodynamic closed boundary. The key measures to overcome these unfavorable factors are to rationalize the distribution network and control the water injection pressure