Fracturing fluid experiment for coalbed methane wells of Jurassic coal in Jiaoping block

The compatibility of fracturing fluid and reservoir is one of the key factors influencing the effects of hydraulic fracturing. In order to study the suitable fracturing fluid formulations of coalbed methane wells of Jurassic coal in Jiaoping block, through analysis of the characteristics of Jurassic coal reservoir, fracturing fluid formulations are proposed, and optimal evaluation of the fracturing fluid formulations is conducted through indoor simulation. The evaluation results show that anti-swelling agent of active water fracturing fluid formulation with 1% potassium chloride is better; injection of cleaning up agent of active water fracturing fluid formulations with 0.05% fluorine carbon ion surface active agent or ethanol slug, then injection of fracturing fluid have good effect; the enzyme fracturing fluid formulation is recommended for further field test. The results have great realistic significance for hydraulic fracturing of coalbed methane wells of Jurassic coal in Jiaoping block.