Are polyacrylamide emulsions drag reducers effective in slick water fracturing?

Polyacrylamide emulsions drag reducers play a decisive role in slick water fracturing. The dissolution rate of polymer emulsions drag reducers was increased by adding hydrophilic surfactants, but the stability of the emulsions is poor, which limits its wide application.

What is a polymer emulsion drag reducer?

Here, a P (AA-AM-AMPS) polymer emulsion drag reducer with dual stimulation response of pH and temperature was designed. Surfactant (D400/OA) with dual responses to pH and temperature is synthesized by using oleic acid (HOA) and polyether amine 400 (D400).

Can oleic acid and cyclohexanediamine emulsion drag reducer be pH-responsive?

Sun et al. . reported that a pH-responsive surfactant was constructed by oleic acid and cyclohexanediamine, and successfully prepared a pH-responsive emulsion drag reducer, which had good stability within 30 days of storage, and the complete release of the emulsion drag reducer at a pH of 12.06 took only 30 s.

Does hydrophilic surfactant increase the dissolution rate of polymer emulsions drag reducers?

The dissolution rate of polymer emulsions drag reducers was increased by adding hydrophilic surfactants, but the stability of the emulsions is poor, which limits its wide application. In order to solve the contradiction between the stability of polymer emulsion and rapid release of drag reducer.

What are the advantages of multi-stimulus-responsive polymer emulsion drag reducers?

Multi-stimulus-responsive polymer emulsion drag reducers have the advantages of wide control window, simple operation and release under mild conditions, which are more conducive to the transformation of low-permeability reservoirs with slick water fracturing fluids.

Does a polymer emulsion drag reducer retain sphericity?

The results showed that the droplets of the polymer emulsion drag reducer before and after storage retained sphericity, which also indicated stability of the P (AM-AA-AMPS) polymer emulsion . Fig. 8. Characterization of P (AM-AA-AMPS) polymer emulsion, (a) 1HNMR; (b) FT-IR; (c) TEM (0 day); (d) TEM (15 days). 3.5.