针对塞528延9油藏注水井高压欠注的问题,对该区块延9储层的岩石矿物物性、储层敏感性、注入水与地层水水质及配伍性和堵塞物等情况进行了相关室内研究和分析.结果表明:储层原始物性差,弱速敏(28.10％)、中等偏强水敏(69.51％)、中等偏强盐敏(69.51％)、中等偏强土酸敏(52.27％)、弱碱敏(27.50％),注入水与地层水不配伍(产生CaCO3、Caso4垢),垢样中含有铁的含氧化合物和部分CaCO3、CaSO4垢等.剖析了注水井高压欠注的机理,为解决塞528区块高压欠注问题提供了解决思路.%Aiming at the problem of high pressure water injection and insufficient water injection of Yan 9 reservoir in block Sai 528,the rock minerals characteristics,formation sensitivity,the quality and compatibility of injection water and formation water,blockage of Yan 9 reservoir were studied and analyzed in laboratory.The results show that the poor original reservoir,weak velocity sensitivity (28.10％),medium to strong water sensitivity (69.51％),medium to strong salt sensitivity (69.51％),medium to strong mud acid sensitivity (52.27％),weak alkaline sensitivity (27.50％),poor compatibility between injection water and formation water (producing CaCO3and CaSO4 deposition),the scale sample contains the oxygen compounds of iron and part of CaCO3,CaSO4 scale and so on.This paper analyzes the mechanism of high pressure water injection and insufficient water injection,and it provides a new idea to solve the problem of high pressure water injection and insufficient water injection in block Sai 528.
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