压裂液对油层伤害的若干机理研究

作者利用溶度积与离子积常数的关系讨论了压裂液中所含离子与地层流体之间的不配伍性；利用岩芯模型、微观砂岩模型等实验手段，就压裂液中的固形物对储集层渗流能力的影响和水锁效应的影响做了初步研究。

SOME MECHANISM OF FORMATION DAMAGED BY HYDROFRAC FLUID

Some new techniques, such as sandstone micromodel, are used in the study, the major conclusions are as follows: l)Ion in the hydrofrac fluid reacts on Ca2 in the formation fluid to produce CaSO4 precipitation distributed in the pore-throat system which can decrease permeability of reservoir rock.2) Particulates in the fluid, smaller than throat can move into throat and be accumulated into bridge-block, then damagt the formation.3)Jamin effect of hydrofrac fluid in the rock can also damage permeability of the formation.