A sand-carrying drag-reducing two-way fracturing fluid

Abstract

The invention provides sand-carrying resistance reduction two-way fracturing liquid, which comprises sliminess water fracturing liquid or jelly fracturing liquid, wherein the sliminess water fracturing liquid is prepared from 0.04 to 0.12 weight percent of thickening agents, 0.5 to 2.0 weight percent of potassium chloride, 0.3 to 0.5 weight percent of discharging aiding agents, 0.3 to 0.5 weight percent of anti-swelling agents, 0 to 0.01 weight percent of gel breakers and the balance water; the jelly fracturing liquid is prepared from 0.6 to 1.5 weight percent of thickening agents, 0.5 to 2.0 weight percent of potassium chloride, 0.3 to 0.5 weight percent of discharging aiding agents, 0.1 to 0.5 weight percent of crosslinking delaying agents, 0.4 to 1.0 weight percent of crosslinking agents, 0 to 0.03 weight percent of gel breakers and the balance water. The sand-carrying resistance reduction two-way fracturing liquid is more suitable for large-scale volume transformation; the resistance reduction effect of the sliminess water fracturing liquid is good; the sand-carrying performance of the jelly fracturing liquid is good; the continuous blending can be realized; no residue is left; the harm is reduced; the construction efficiency is improved.

Description

technical field [0001] The invention relates to a fracturing fluid, in particular to a sand-carrying drag-reducing two-way fracturing fluid, which belongs to the technical field of oilfield exploitation. Background technique [0002] With the large-scale development of reservoirs with various special lithologies, complex reservoir types, fracture shapes, and abnormal conditions, the reservoir stimulation fluid technology is facing new challenges. Low-permeability and ultra-low-permeability reservoirs have low permeability, serious damage, and poor reservoir stimulation effect; the development of volume stimulation technology has brought about an increase in the scale of reservoir transformation and construction displacement, and it is necessary to improve water efficiency, reduce operating costs, and Higher performance requirements are put forward for liquids with low concentration, no residue, low friction, and strong carrying capacity; especially in the past two years, oil...

AI Technical Summary

Problems solved by technology

Among them, polyacrylamide drag-reducing agents have a good drag-reducing effect compared with vegetable glue, but polyacrylamide, which is specially used as a drag-reducing agent, is poor in cross-linking and temperature resistance.

Images