The invention relates to an oil-phase-free resistance
reducing agent for
fracturing fluid and a preparation method of the oil-phase-free resistance
reducing agent. The resistance
reducing agent comprises the following components in parts by weight: 38-58 parts of a suspending agent, 1-2 parts of a dispersing agent, 1-2 parts of a thixotropic agent, 1-2 parts of an emulsifying agent, 4-8 parts of a cross-linking agent and 35-50 parts of a
thickening agent. The preparation method of the resistance reducing agent comprises the following steps: (1) sequentially and slowly adding the dispersing agent, the thixotropic agent and the emulsifying agent into the suspending agent under the stirring condition at the rotating speed of 300-600rad / min, and stirring for 15-30 minutes to obtain a
mixed solution I; (2) sequentially and slowly adding a
thickening agent and a cross-linking agent into the
mixed solution I under the stirring condition of the rotating speed of 200-500rad / min, and stirring for 5-15 minutes to obtain a target product. The prepared resistance reducing agent uses a non-oil suspending agent, so that the generation of oil pollutants is reduced from the source, the
pollution to a reservoir and the environment is reduced, and the subsequent treatment cost of oily
sewage and oily
sludge is reduced; the cross-linking agent is introduced into the resistance reducing agent, resistance reducing and cross-linking are integrated, the cross-linking agent does not need to be independently added in the fracturing process, and the fracturing construction technology can be simplified.