Fracturing fluid stock solution, full-filling preposition-free sand adding fracturing method and fracturing fluid cross-linking solution thereof

Abstract

The invention relates to the technical field of petroleum extraction, in particular to a fracturing fluid stock solution, a full-filling preposition-free sand adding fracturing method and a fracturing fluid cross-linking solution thereof. The fracturing fluid stock solution is prepared from guargum, clay stabilizer, potassium chloride, cleanup additive, bactericide, pH regulator, fluid loss additive, low-temperature activator and water. The invention reduces the well entrance solution amount of the fracturing fluid, reduces the secondary pollution and damage to sensitive ground layers by the fracturing fluid, shortens the occupation and production period, reduces the operation cost and has high fracturing fluid efficiency. The supporting crack is fully filled, wide seams are formed in zones near a well, the diversion capability of cracks near the well is effectively improved, and the after pressure yield of the single well is improved. The process is simple and can be completed without the assistance by special equipment, so the in-site operation is convenient. The invention can be widely used for the oil layer transformation of low-seepage and water-sensitive storage layer oil gas zone blocks.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, and relates to a fracturing fluid stock solution, a full-filling non-pre-sand fracturing method and a fracturing fluid cross-linking fluid. Background technique [0002] Hydraulic fracturing is one of the important stimulation measures for oil and gas well stimulation, water well injection, and oil and gas well productivity and recovery in low-permeability and ultra-low-permeability reservoirs. It has been more than 60 years since hydraulic fracturing was successfully tested in Texas, USA in 1947. It injects high-viscosity liquid into the well with a displacement that greatly exceeds the absorption capacity of the formation through the high-pressure pump set on the ground, and then forms high pressure near the bottom of the well. After the pressure exceeds the ground stress near the bottom of the well and the tensile strength of the rock, fractures are formed in the formation, and...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a fracturing fluid stock solution, a full-filling non-pre-sand fracturing method and a fracturing fluid cross-linking fluid, which overcomes the deficiencies of the prior art and solves the problem that the existing low-permeability oil and gas fields cannot reduce water penetration. The problem of implementing fracturing stimulation on the premise of secondary pollution and damage to sensitive reservoirs, which reduces the amount of fracturing fluid entering the well, reduces the secondary pollution and damage of fracturing fluid to sensitive formations, and shortens the production period. Reduced operating costs