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通过室内实验,揭示了在水基压裂过程中携砂冻胶粘度下降的原因主要是GUAR分子的降解与液体pH值的降低,并对影响pH值降低的因素进行了室内实验的探讨性研究,根据实验结果建议在水蒸压裂中使用缓冲剂,可以使压裂液在低用量下获得理想的使用粘度。
Through laboratory experiments, it is revealed that the reason for the decrease of viscosity of sand-carrying jelly during water-based fracturing is mainly the degradation of GUAR molecules and the decrease of liquid pH, and the feasibility of laboratory experiments on the factors affecting the decrease of pH According to the experimental results, it is suggested to use the buffer in the steam fracturing to make the fracturing fluid obtain the ideal use viscosity at low dosage.