Fracturing inclusion self-dissolving diversion agent and preparation method thereof

Abstract

The invention relates to an inclusion self-dissolving diverting agent for fracturing and a preparation method thereof. The diverting agent is composed of 10-15 parts of guanidine collagen powder, 30-40 parts of ferric chloride, 30-40 parts of dioxygen trioxide Aluminum, 1-2 parts of sodium bicarbonate, 8-10 parts of ammonium persulfate, 1-2 parts of potassium ferricyanide and 1 part of γ-aminopropyltriethoxysilane, the steering agent is in the form of inner wrapping , in the form of spherical particles. The preparation method is as follows: at room temperature, guanidine collagen powder, ferric chloride, aluminum oxide, sodium bicarbonate, and potassium ferricyanide are successively dissolved in water and stirred for 5 minutes according to the formula ratio, and then the solution is dried and agglomerated, and It is crushed and pulverized, and then sprayed on the surface of ammonium persulfate by gamma-aminopropyltriethoxysilane coupling agent, the prepared powder is adhered and wrapped in the outer layer of ammonium persulfate crystals to form spherical particles, and finally The particles can be dried. The diverting agent is in the form of a gel breaker inner package, which has self-dissolution ability, and does not need to add additional gel breaker degradation agent during construction.

Description

technical field [0001] The invention relates to an inclusion self-dissolving diversion agent for oil well fracturing and a preparation method thereof. Background technique [0002] Conventional fracturing fractures generally extend along the direction of the maximum horizontal principal stress. Due to the influence of injection-production well patterns, the extension length of fractures cannot be excessively increased, so the volume of conventional fracturing stimulated reservoirs is limited. In order to increase the drainage area of ​​the oil well, the diversion fracturing technology can be used to open fractures along other directions while the injection-production well pattern remains unchanged, thereby increasing the production of the oil well. The performance of the diverting agent plays a decisive role in the successful implementation of diverting fracturing. [0003] At present, the commonly used diverting agents are: suspension diverting agents, whose disadvantages ...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used diverting agents are: suspension diverting agents, whose disadvantages are that it is difficult to form a large pressure difference resistance due to turbulent flow and blast hole deformation, the plugging efficiency is low, and filter cakes cannot be formed; underground cross-linking diverting agents have the disadvantages Because a small dose cannot reach the required pressure, a large dose will cause new damage. Although a filter cake can be formed, the underground reaction is unstable and cannot reach the required strength; the once-crosslinked particle diverting agent on the ground is characterized by its own strength Large, but the plugging efficiency is low, and the fracturing fluid fluid loss is large; the plugging ball diversion agent is characterized by high strength and small deformation, but it is easy to fall off, low plugging efficiency, and cannot be self-degraded