对吉林油田新Ⅴ区块注水压力高的原因进行了分析。经研究发现 ,注水压力上升的主要原因是粘土膨胀、机械杂质、胶质及沥青质等造成的地层堵塞。另外 ,钻井泥浆污染也是造成注水压力升高的原因之一。对区块实施“热酸复合型地层强化处理技术”和大排量洗井等措施后 ,注水压力和启动压力都有了明显下降 The reason of high water injection pressure in the new V block of Jilin Oilfield was analyzed. The study found that the main reason for the pressure of water injection is due to the expansion of clay, mechanical impurities, gum and asphaltene formation caused by the formation of clogging. In addition, drilling mud pollution is also one of the causes of increased water injection pressure. After the implementation of the “thermal-acid composite formation strengthening treatment technology” and large-displacement well washing and other measures, the water injection pressure and the starting pressure have dropped significantly