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Nanometer emulsion type water control fracturing fluid for tight gas reservation well and preparation method thereof

A nano-emulsion and hydraulic fracturing technology, applied in chemical instruments and methods, earth-moving drilling, wellbore/well components, etc., can solve the problems of large particle size of polymer cross-linked system, easy blockage of gas flow channels, and high injection pressure , to achieve the effect of reducing water permeability, obvious water control effect and low surface tension

Active Publication Date: 2013-04-24
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main agents of existing water-control fracturing fluids are mostly high-molecular-weight polymers, the physical properties of tight gas reservoirs are poor, and the pore size is micro-nano scale, while the polymer cross-linking system or jelly system has large particle size and high viscosity, so It is not suitable for water control fracturing fluid in tight gas reservoirs, otherwise it will not only cause the injection pressure to be too high during the fracturing process, but also easily block the gas flow channel and cause reservoir damage

Method used

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  • Nanometer emulsion type water control fracturing fluid for tight gas reservation well and preparation method thereof
  • Nanometer emulsion type water control fracturing fluid for tight gas reservation well and preparation method thereof
  • Nanometer emulsion type water control fracturing fluid for tight gas reservation well and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] a. At room temperature, add 20g sodium dodecyl sulfate (SDS) and 11g n-butanol to 50g amino silicone oil (ammonia value 0.6), mix in a 250mL beaker, stir at 250r / min for 20min, then add 0.5 g acetic acid and 50 mL deionized water, continue to stir for 30 minutes, add 6 g of NaCl and 50 mL of deionized water, and continue to stir for about 10 minutes to a homogeneous phase to obtain an amino silicone oil nanoemulsion.

[0037] b. Add 0.3-0.5 parts of amino silicone oil nanoemulsion to 100 parts of water and mix them evenly to obtain a homogeneous transparent blue-blue liquid, which is a nanoemulsion type water-control fracturing fluid.

[0038] figure 1 This is an electron micrograph of the nanoemulsion type water-control fracturing fluid prepared in Example 1. The figure shows that the particle size of the product is relatively uniform, and the particle size is about 20nm-30nm.

Embodiment 2

[0040] a. At room temperature, add 15g fatty alcohol polyoxyethylene ether (AEO-9) and 12g n-butanol to 50g amino silicone oil (ammonia value 0.3), put them in a 250mL beaker and mix, stir at 200r / min for 20min, then Add 0.35g of acetic acid and 50mL of deionized water, continue to stir for 30min, add 5g of NaCl and 50mL of deionized water, continue to stir for about 10min until homogeneous, to obtain amino silicone oil nanoemulsion.

[0041] b. Add 0.3-0.5 parts of amino silicone oil nanoemulsion to 100 parts of water and mix them evenly to obtain a homogeneous transparent blue-blue liquid, which is a nanoemulsion type water-control fracturing fluid.

Embodiment 3

[0043] a. At room temperature, add 15g octylphenol polyoxyethylene ether (OP-10) and 12g n-butanol to 50g amino silicone oil (ammonia value 0.3), put them into a 250mL beaker and mix, stir at 150r / min for 25min, Then add 0.4g of acetic acid and 50mL of deionized water, continue to stir for 30 minutes, add 5g of NaCl and 50mL of deionized water, continue to stir for about 10 minutes to homogeneity, and obtain a viscous liquid with more white bubbles, and let it stand until the bubbles disappear. Amino silicone oil nanoemulsion.

[0044] b. Take 0.3-0.5 parts of amino silicone oil nanoemulsion into 100 parts of water and mix evenly to obtain a homogeneous transparent blue-blue liquid, which is a nanoemulsion type water-control fracturing fluid.

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Abstract

The invention relates to a nanometer emulsion type water control fracturing fluid for a tight gas reservation well and a preparation method of the nanometer emulsion type water control fracturing fluid. The nanometer emulsion type water control fracturing fluid is prepared by 0.3-0.5 part of amino silicon oil nanometer emulsion and 100 parts of water by weight. The preparation method comprises the following steps of: adding an emulsifying agent and a low-molecule alcohol into the amino silicon oil; uniformly mixing the emulsifying agent, the low-molecule alcohol and the amino silicon oil; adding an organic acid and some water; continuously stirring, then adding an electrolyte and the rest water, stirring until the phase is homogeneous, and then obtaining amino silicon oil nanometer emulsion. The preparation process mentioned in the invention is simple, the process is easy to control, and the nanometer emulsion type water control fracturing fluid obtained has hydrophobicity, obvious water control effect, low viscosity, small grain size, low surface tension and stable performance, so the nanometer emulsion type water control fracturing fluid is suitable for water control fracturing improvement of a near-water or high-water content tight gas reservation well.

Description

Technical field [0001] The invention relates to a water-controlling fracturing reform for gas wells of high water-cut and low-permeability tight gas reservoirs, in particular to a tight gas reservoir nanoemulsion type water-controlling fracturing fluid and a preparation method thereof. Background technique [0002] It is difficult to obtain industrial gas flow in low-permeability tight gas reservoirs without fracturing and other stimulation enhancements. Artificial fractures formed by fracturing of high-water-cut and low-permeability tight gas wells can easily lead to rapid rise of water cut in gas wells. Can it be solved simultaneously The problem of rapid rise and increased production of gas wells is a common problem that gas field workers at home and abroad want to solve. With the rapid increase in the proportion of tight gas reservoir reserves in natural gas energy, the development of tight sandstone gas has become one of the hot issues. For this reason, domestic and foreign ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68E21B43/26
Inventor 罗明良孙厚台温庆志刘飞刘卓高遵美郭烨杨国威
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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