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水力压裂过程中,压裂液的伤害影响着压裂改造的效果。胍胶破胶液中的水不溶物、残渣等固相颗粒不会侵入低渗地层,胍胶对地层的伤害可逆,可通过返排过程渐渐恢复至90%。胍胶对支撑剂导流层的伤害随浓度增加而增加,且几乎不可逆;关键是施工过程中就要降低伤害。对羟丙基胍胶与羧甲基羟丙基胍胶系列配方,以及不同浓度的配方分别对支撑剂导流层伤害分析,胍胶使用量越大、浓度越高、残渣越高对导流能力的伤害越大。
In the process of hydraulic fracturing, the damage of fracturing fluid affects the effect of fracturing. The insoluble particles in the guanidine gel breaking liquid and the solid particles such as residue do not invade the low permeability formation. The damage of the guar gum to the formation is reversible and can be gradually recovered to 90% through the return flow. The damage caused by guar gum to the proppant layer increases with increasing concentration and is almost irreversible. The key is to reduce the damage during construction. Hydroxypropyl guar gum and carboxymethyl hydroxypropyl guar gum series of formulations, as well as different concentrations of proppant formulations, respectively, injury analysis, the greater the amount of guanidine use, the higher the concentration, the higher the residue on the diversion The greater the damage ability.