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Liquid self-supporting high-speed channel fracturing fluid and experimental method

A channel fracturing and self-supporting technology, which is applied in the direction of chemical instruments and methods, mining fluids, earth drilling and production, etc., can solve the problems of high cost, low flow conductivity, large amount of phase change fracturing fluid, etc., to avoid sand Blocking risks, saving costs, and reducing the effect of construction techniques

Active Publication Date: 2020-09-29
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] In order to solve the problems of large amount of phase change fracturing fluid, high cost, small proppant particle size and low flow conductivity in the prior art, the present invention provides a liquid self-supporting high-speed channel fracturing fluid and an experimental method

Method used

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  • Liquid self-supporting high-speed channel fracturing fluid and experimental method
  • Liquid self-supporting high-speed channel fracturing fluid and experimental method
  • Liquid self-supporting high-speed channel fracturing fluid and experimental method

Examples

Experimental program
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Effect test

Embodiment 1

[0067] A liquid self-supporting high-speed channel fracturing fluid. Mix 40 g of bisphenol A epoxy resin E-51 with 0.04 g of modified polypropylene fiber, and then add 8 g of triethylenetetramine curing agent and mix evenly to obtain A Liquid; mix 500 g of guar gum fracturing fluid, 0.5 g of organic boron crosslinking agent, 20 g of potassium chloride, and 0.5 g of modified polypropylene fiber to obtain liquid B. Take the above liquid A and liquid B according to the mass ratio of 1:10. Spray liquid A into liquid B, and then inject the mixed liquid into fractures in the flat plate, simulating the formation temperature at 60°C, and curing time for 60 minutes.

[0068] The schematic diagram of the experiment in the plate seam is as follows: figure 1 shown. After solidification, centimeter-scale particles are formed, and the particles are evenly dispersed in the cracks, and centimeter-scale pores are formed between the particles. The schematic diagram of the experimental result...

Embodiment 2

[0078] A liquid self-supporting high-speed channel fracturing fluid, take 40g of bisphenol A epoxy resin E-51, dilute with 8g of ethanol diluent, then add 0.2g of polyvinyl alcohol fiber and mix evenly, add triethylenetetramine 16g of curing agent, mixed well to obtain liquid A; 500g of guar gum fracturing fluid, 5g of borax crosslinking agent, 100g of potassium chloride, 100g of calcium bromide, 2.5g of modified polypropylene fiber, and surfactant dodecylbenzene Sodium sulfonate 20g was mixed uniformly to obtain liquid B. Take the above liquid A and liquid B according to the mass ratio of 1:3, spray liquid A into liquid B, and then inject the mixed liquid into the cracks of the flat plate, simulate the formation temperature at 80°C, and cure for 40 minutes.

[0079] The schematic diagram of the experiment in the plate seam is as follows: image 3 shown. After solidification, centimeter-scale particles are formed, and the particles are evenly dispersed in the cracks, and cen...

Embodiment 3

[0087]A liquid self-supporting high-speed channel fracturing fluid, take bisphenol A type epoxy resin E-51 and bisphenol F type epoxy resin according to the mass ratio of 3:1 and mix evenly, a total of 60g, add acetone diluent 7g after mixing evenly Add 0.2 g of polyvinyl alcohol fibers and mix evenly, then add 15 g of phthalic anhydride to obtain liquid A; take 750 g of emulsion fracturing fluid, 40 g of potassium chloride, and 1.2 g of polyvinyl alcohol fibers and mix evenly to obtain liquid B. Take the above liquid A and liquid B according to the mass ratio of 1:19, spray liquid A into liquid B, and then inject the mixed liquid into the cracks of the flat plate, simulate the formation temperature at 90°C, and cure for 30 minutes. After solidification, centimeter-scale particles are formed, and the particles are evenly dispersed in the cracks, and centimeter-scale pores are formed between the particles. The schematic diagram of the experimental results is as Figure 4 shown...

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Abstract

The invention provides a liquid self-supporting high-speed channel fracturing fluid and an experimental method. The mass ratio of a fluid A to a fluid B in the fracturing fluid is 1: (3-19), wherein the liquid A comprises resin, a curing agent and a suspension dispersing agent; the liquid B comprises conventional fracturing liquid, a density regulator and a suspension dispersing agent, and the liquid A is suspended and dispersed in the liquid B; the liquid self-supporting fracturing fluid does not need a solid-phase propping agent, an existing conventional fracturing mode is changed, the costof the solid-phase propping agent is saved, the construction process is reduced, and the sand blocking risk caused by the solid-phase propping agent is avoided. Centimeter-level cured particles can beformed, the compressive strength is high, and the defect that a traditional low-density proppant is prone to being compacted is overcome. And the solid-phase system A liquid accounts for less ratio,so that the fracturing cost can be reduced, and economic benefits can be obtained. Uniformly suspended and dispersed centimeter-level solid particles formed by the liquid self-supporting fracturing fluid can form a seepage channel with high flow conductivity, reduce the seepage resistance, enlarge the crack control area and improve the yield.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development in the petroleum industry, and relates to a fracturing fluid and an experimental method for realizing high-speed channel fracturing by liquid self-supporting technology. [0002] technical background [0003] Low permeability, ultra-low permeability, tight oil and gas reservoirs, and shale gas reservoirs have the characteristics of low porosity, low permeability, and low productivity. It is difficult to obtain industrial oil and gas flow only by conventional development methods. The method is mainly the hydraulic fracturing development method. Through hydraulic fracturing, fractures with high conductivity are formed, thereby changing the seepage capacity of the reservoir, increasing the oil drainage area, and achieving the effect of increasing production. [0004] Hydraulic fracturing development technologies all need to inject sand-carrying fluid, and the solid proppant carri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68E21B43/267E21B49/00
CPCC09K8/685C09K8/882C09K8/885C09K8/602C09K8/905E21B43/267E21B49/00C09K2208/08
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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