Low damage carboxymethyl hydroxypropyl guanidine gum foam fracturing fluid of low permeability gas reservoir and preparation method of low damage carboxymethyl hydroxypropyl guanidine gum foam fracturing fluid

Abstract

The invention relates to the technical field of fracturing and production increasing of an oil well or natural gas well, and in particular relates to a low damage carboxymethyl hydroxypropyl guanidine gum foam fracturing fluid of a low permeability gas reservoir and a preparation method of the low damage carboxymethyl hydroxypropyl guanidine gum foam fracturing fluid. The low damage carboxymethyl hydroxypropyl guanidine gum foam fracturing fluid of the low permeability gas reservoir contains the following components in parts by weight: 100 parts of base solution, 0.2-0.5 part of cross-linking agent, 0.03-0.04 part of gel breaker, and liquid nitrogen, wherein the liquid nitrogen accounts for 5-7 percent of total volume of the base solution and the cross-linking agent. The base solution, the cross-linking agent and a gel breaker are pumped into an underground fracturing stratum, and the liquid nitrogen is pumped, the base solution, the cross-linking agent, the gel breaker and the liquid nitrogen are mixed uniformly on the underground fracturing stratum, thus the low damage carboxymethyl hydroxypropyl guanidine gum foam fracturing fluid reaches the purpose of fracturing operation, and has the advantages of low content of residue after fracturing, good gel breaking property, rapid flowback, little damage to reservoir stratum water, and good fracturing effect. According to the low damage carboxymethyl hydroxypropyl guanidine gum foam fracturing fluid, the production cost is lowered, and the working efficiency is increased.

Description

technical field

[0001] The invention relates to the technical field of fracturing stimulation of oil wells or natural gas wells, and relates to a low-damage carboxymethyl hydroxypropyl guaridine foam fracturing fluid for low-permeability gas reservoirs and a preparation method thereof. Background technique

[0002] At present, hydraulic fracturing is the main means of stimulation for low-permeability gas reservoirs. Fracturing fluid is the working fluid in the process of hydraulic fracturing to transform oil and gas layers. The fracturing fluid provides a means for hydraulic fracturing operations. After forming formation fractures, carrying proppant deep into artificial fractures and fracturing, chemical decomposition or gel breaking to low viscosity ensures that most of the fracturing fluid is flowed back to the ground to purify the fractures. In view of the characteristics of low-permeability gas reservoirs and gas wells without pumping units and other equipment, it is ver...

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