| abstract |
The invention discloses a method for treating and reusing shale gas fracturing backflow fluid, which comprises the steps of treating the shale gas fracturing backflow fluid and the step of preparing a polymer glue solution, wherein the polymer glue solution preparation step Yes: in terms of mass ratio, add 0.5%~1.0% potassium polyacrylamide KPAM, 2.0%~3.0% polymer fluid loss reducer LS‑2 in clean water for hydration, expand the polymer molecular chain, and obtain polymerization The polymer glue is mixed with the treated fracturing flowback fluid at a ratio of 7:3, and the mixed fracturing flowback fluid is used to prepare the drilling fluid. The invention does not need to add mechanical equipment, operates directly in the on-site circulating tank, the method is simple, and does not increase the extra cost; no secondary pollution waste is generated, and all the treated fracturing flowback fluid is reused, which is more environmentally friendly. |