Low-filtration-loss long-seam forming clean fracturing process

Abstract

The invention relates to the technical field of oil and gas field production and development, in particular to a low-filtration-loss long-seam forming clean fracturing process. According to the process, a weakly acidic clean fracturing fluid which is low in residue, low in damage, good in temperature resistance, shearing resistance and sand carrying performance and capable of being used immediately after being prepared on site and being continuously mixed is matched with a novel efficient filtrate loss reducer, the filtrate loss property of the clean fracturing fluid is greatly reduced throughthe novel efficient filtrate loss reducer, the fracture forming performance of the clean fracturing fluid is improved, the damage to a reservoir can be effectively reduced, the filtration loss of theclean fracturing fluid in the reservoir during fracturing can be reduced, fluid consumption of the fracturing fluid is effectively reduced under the same fracturing scale, and low-filtration-loss clean fracturing long-seam forming is realized. According to the process, respective defects of the clean fracturing fluid and a guanidine gum fracturing fluid are overcome, the filtration loss of the clean fracturing fluid in the reservoir during fracturing construction is reduced, the fluid fracture forming efficiency and the construction efficiency are improved, the fracturing fluid consumption and the damage to the reservoir are reduced, a stratum is effectively protected, and the water saving and reduction of a fracturing comprehensive cost are facilitated.

Description

technical field [0001] The invention relates to the technical field of production and development of oil and gas fields, in particular to a clean fracturing process for creating long fractures with low fluid loss and suitable for reservoir reconstruction. Background technique [0002] Fracturing operations are becoming more and more common in the production and development of oil and gas fields, especially in the development of various low-permeability oil and gas fields, stimulation of production and injection of old wells, and plug removal of reservoirs. In the past, guar gum fracturing fluid was often used in traditional fracturing operations, but guar gum fracturing fluid has the disadvantages of high liquid preparation cost, low construction efficiency, high friction resistance, high residue content, large reservoir damage, and fracturing flowback fluid. However, the rapid development of clean fracturing fluids in recent years has low friction, low residue, less damage ...

AI Technical Summary

Problems solved by technology

In the past, guar gum fracturing fluid was often used in traditional fracturing operations, but guar gum fracturing fluid has the disadvantages of high liquid preparation cost, low construction efficiency, high friction resistance, high residue content, large reservoir damage, and fracturing flowback fluid. However, the rapid development of clean fracturing fluids in recent years has low friction, low residue, less damage to reservoirs, good reusability of fracturing flowback fluids, and no need to prepare fluids in advance, which can realize " Ready-to-use, continuous mixing” and high construction efficiency can well make up for the shortage of guar gum fracturing fluid, but clean fracturing fluid has a large filtration loss and low fracture efficiency. Under the same fracturing scale, clean fracturing fluid The fracturing water consumption of fracturing fluid is relatively large, especially in water-scarce areas such as the central and western regions, and well areas that are not conducive to fracturing water preparation, which greatly limits the promotion and application of clean fracturing fluid

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