Liquid self-supporting highway fracturing construction process

Abstract

The invention provides a liquid self-supporting highway fracturing construction process, comprising the following steps: (1) preparing liquid B1 from conventional fracturing liquid and a density adjusting agent according to a certain weight ratio; (2) manufacturing cracks by using the liquid B1; (3) preparing liquid A and liquid B during the manufacturing of the cracks: mixing resin or a resin diluent with a suspension dispersant, adding a curing agent, and performing uniform mixing to obtain the liquid A; uniformly mixing the liquid B1 with the suspension dispersant or uniformly mixing the liquid B1 with the suspension dispersant and a crosslinking agent to obtain the liquid B; (4) after crack manufacturing is completed, jetting the liquid A immediately into the liquid B through a plurality of jet orifices, the jet orifices being located below the liquid surface of the liquid B, and injecting the A and B mixed liquid into a stratum; and (5) displacing all the A and B mixed liquid intothe stratum by using displacement liquid, and building the pressure for 40 to 180 min. The process solves the problem, in the prior art, that the stratum is easily damaged because the liquid A is distributed in blocks and pieces, and can achieve comprehensive crack self-supporting and highway fracturing effects.

Description

technical field [0001] The technical field of oil and gas field development in the petroleum industry relates to a liquid self-supporting technology to realize high-speed channel fracturing construction technology. [0002] technical background [0003] Low-permeability, ultra-low-permeability, tight oil and gas reservoirs, and shale gas reservoirs are difficult to obtain industrial oil and gas flow only by conventional development methods. According to the characteristics of low-permeability reservoirs, the commonly used development method is mainly hydraulic fracturing. The formation of fractures with high conductivity can change the seepage capacity of the reservoir, increase the oil drainage area, and achieve the effect of increasing production. [0004] The current hydraulic fracturing development technology first opens formation fractures through pre-hydraulic pressure, and then injects sand-carrying fluid containing solid proppant. After the fracture is closed, the so...

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Problems solved by technology

[0007] Aiming at the problems of large amount of phase change materials used in the prior art, high cost, and easy formation damage, the present invention proposes a liquid self-supporting high-speed channel fracturing construction method for a new type of liquid self-supporting fracturing fluid. The fracturing fluid does not need solid phase proppant. After the fracturing fluid is injected into the fracture, it can solidify to form centimeter-scale spherical particles, which can be evenly filled in the fracture, promote the extension of fracture height and fracture length, and form centimeter-level high-speed seepage channels. Unlimited diversion capacity, increase oil drainage area, enhance oil recovery

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