聚丙烯酰胺驱替中的粘弹效应和油藏压力分布

HIGH TEMPERATURE MUD ACID CORROSION INHIBITORS AS USED IN MEDIUM AND LOW TEMPERATURE ACIDIZING FLUIDS

在模拟油藏工程条件下进行了聚丙烯酰胺溶液岩心流动试验。当流体注入速度提高到某一数值时，聚合物溶液出现了粘弹效应，而且粘弹效应随注入速度的继续增大而增强。当注入速度进一步提高到某一数值范围，聚合物的粘弹效应趋于稳定。根据实际的油藏参数计算了聚合物驱替中的油藏压力分布。聚合物溶液在近井地带出现粘弹效应。

J is a high temperature (120℃) corrosing inhibitor for mud acid acidizing fluids with exellent anti pitting property and, however, its uses are limited. In recent years, efforts are made to seek for new ways of using this chemical. This paper describes the application of 8301 J at lowered levels, 0.5-1.5% instead of 2.5%, to acidizing medium and low temperature (<100℃) water injection wells with common, micellar, and magnetized mud acids for scale removal, blockage relieving, and injectivity enhancing in perepheral, hardly exploitable and being exploited body reservoirs of Daqing.