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针对高温油藏注水井清水倒灌、油层污染及作业无法正常进行等问题,室内研制出了无污染洗井液体系配方,并对其性能进行评价。该无污染洗井液体系流体密度低,粘度大,抗温高度可达90℃,对地层伤害小,清洗能力强,外观为浅黄色粘稠液体。
In view of the problems such as intrusion of fresh water in injection wells of high temperature reservoirs, contamination of oil layers and inability to operate properly, the formula of non-polluted well washing fluid system was developed indoors and its performance was evaluated. The non-polluting fluid system has low fluid density, high viscosity, high temperature resistance up to 90 ℃, less damage to the formation, cleaning ability, the appearance of light yellow viscous liquid.