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Liquid self-supporting highway fracturing construction process

A channel fracturing and construction technology technology, which is applied in the fields of production fluid, wellbore/well components, and drilling composition, etc., can solve the problems of formation damage, large amount of phase change materials, and high cost, and achieves high fluidity, The effect of low cost and simple construction

Active Publication Date: 2020-09-25
青岛大地新能源技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Liquid self-supporting highway fracturing construction process
  • Liquid self-supporting highway fracturing construction process
  • Liquid self-supporting highway fracturing construction process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] A fracturing construction technology for liquid self-supporting high-speed channel fracturing fluid, comprising the following steps:

[0102] (1) Prepare B1 liquid and resin diluent: mix 100 parts by weight of guar gum fracturing fluid with 4 parts by weight of potassium chloride to obtain B1 liquid; The ethanol diluent of weight part mixes evenly and obtains resin diluent;

[0103] (2) Create cracks; use the crack network simulation device disclosed in the patent CN110725675A to simulate cracks.

[0104] (3) Prepare liquid A and liquid B while preparing cracks: add 0.1 part by weight of modified polypropylene fiber to the resin diluent, mix well, add 25 parts by weight of triethylenetetramine, and stir evenly to form liquid A. Add 1 weight part of organoboron crosslinking agent to B1 liquid, and 0.1 weight part of modified polypropylene fiber and stir evenly to form B liquid.

[0105] (4) After the seam is completed, immediately mix A liquid and B liquid, and inject ...

Embodiment 2

[0116] A liquid self-supporting high-speed channel fracturing hydraulic fracturing construction technology includes the following steps.

[0117] (1) Prepare B1 liquid and resin diluent: Bisphenol A epoxy resin E-51 and bisphenol F epoxy resin are prepared according to 3:1, totaling 100 parts by weight, mixed with 20 g parts by weight of acetone diluent to obtain resin Diluent: Mix 100 parts by weight of emulsion fracturing fluid with 4 parts by weight of potassium chloride to obtain B1 solution.

[0118] (2) Create cracks: use the crack network simulation device disclosed in the patent CN110725675A to simulate cracks.

[0119] (3) Prepare liquid A and liquid B while preparing cracks: add 0.5 parts by weight of modified polypropylene fiber to the resin diluent, then add 20 parts by weight of phthalic anhydride and mix uniformly to form liquid A. Add 0.2 parts by weight of modified polypropylene fiber to B1 liquid and stir to form B liquid evenly.

[0120] (4) After the seam ...

Embodiment 3

[0129] A liquid self-supporting high-speed channel fracturing hydraulic fracturing construction technology includes the following steps.

[0130] (1) Prepare B1 liquid and resin diluent: 100 parts by weight of bisphenol A epoxy resin E-51 quality, 20 parts by weight of ethanol diluent mix uniformly to obtain resin diluent; 100 parts by weight of guar gum fracturing fluid and chlorinated 40 parts by weight of potassium were mixed uniformly to obtain liquid B1.

[0131] (2) Create cracks: use the crack network simulation device disclosed in the patent CN110725675A to simulate cracks.

[0132] (3) Prepare liquid A and liquid B on site. Add 0.2 parts by weight of polyvinyl alcohol fiber to the resin dilution liquid and mix evenly, then add 40 parts by weight of phthalic anhydride, and stir evenly to form A liquid. Add 0.1 part by weight of borax crosslinking agent to B1 liquid, add 0.5 part by weight of polyvinyl alcohol fiber and stir evenly to form B liquid.

[0133] (4) Afte...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B43/267C09K8/80C09K8/68
CPCE21B43/26E21B43/267C09K8/80C09K8/602C09K8/685C09K8/887C09K8/882C09K2208/08
Inventor 刘化普温庆志史胜龙房堃张东晓
Owner 青岛大地新能源技术研究院
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