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为了掌握完井液中的固相颗粒侵入储层的深度,评价储层损害,进行完井液体系的设计,文中对不同完井液在不同条件下流出岩样末端的固相颗粒含量进行了测定。根据测定值进行多元回归处理得到了完井液中固相颗粒侵入储层最大深度的数学模型。实验结果表明,用此模型计算完井液中固相颗粒侵入储层的深度值与实测值之间的吻合性较好,并且该模型中各参数容易得到,可以推广使用。同时,还对完井液中固相颗粒含量和固相颗粒粒径分布、储层岩石物性、完井液液柱压力和地层孔隙压力之差等影响固相颗粒侵入储层深度的各种因素进行了较系统的讨论。
In order to know the depth of penetration of solid particles in the completion fluid into the reservoir and evaluate the reservoir damage, the design of the completion fluid system was carried out. The content of solid particles at the end of the rock sample from different completion fluids under different conditions Determination. According to the measured value, multiple regression was performed to get the mathematical model that the solid particle invaded into the reservoir to the maximum depth. The experimental results show that the agreement between the depth and the measured values of solid particles in well completion fluid is good, and the parameters of the model are easy to get and can be widely used. At the same time, various factors affecting the depth of penetration of solid particles into the wellbore, such as the solid particle content in the completion fluid and the particle size distribution of the solid phase, the petrophysical properties of the reservoir, the pressure of the completion liquid column pressure and the pore pressure of the formation Conducted a more systematic discussion.