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Application of thermal tackifying emulsion polymer, and fracturing fluid sand carrying agent and slickwater drag reducer based on thermal tackifying emulsion polymer

A kind of emulsion polymer and polymer technology, applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of poor sand carrying performance or drag reduction efficiency, cumbersome liquid preparation process, etc., and achieve the goal of shortening the dissolution time Effect

Active Publication Date: 2020-06-09
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies of the prior art, to provide the use of heat-increased emulsion polymers, and to provide fracturing fluid sand-carrying agents and slick water drag reducers based on the emulsion polymers, so as to solve the needs of conventional fracturing fluid systems Pre-dissolution, cross-linking, and cumbersome liquid preparation process defects, while overcoming the traditional fracturing fluid or slick water drag reducer due to "thermal thinning" (viscosity decreases with increasing temperature), which leads to poor sand-carrying performance or drag reduction efficiency lack of

Method used

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  • Application of thermal tackifying emulsion polymer, and fracturing fluid sand carrying agent and slickwater drag reducer based on thermal tackifying emulsion polymer
  • Application of thermal tackifying emulsion polymer, and fracturing fluid sand carrying agent and slickwater drag reducer based on thermal tackifying emulsion polymer
  • Application of thermal tackifying emulsion polymer, and fracturing fluid sand carrying agent and slickwater drag reducer based on thermal tackifying emulsion polymer

Examples

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Embodiment 1

[0046] A heat-increased slick water drag reducer provided in this embodiment comprises, by mass percentage: 0.1% heat-increased polymer, 0.01% phase inverting agent and the balance of water.

[0047] The heat-adhesive polymer is added in the form of a heat-adhesive emulsion polymer (the following examples are the same), and the heat-adhesive emulsion polymer is made of Pluronic (BASF company's product model) block polyether temperature-sensitive macromolecule, anion Monomer and acrylamide monomer obtained by polymerization. The Pluronic thermosensitive macromolecule is block polyether F108. The anionic monomer is a mixture of sodium acrylate and 2-acrylamide-2-methylpropanesulfonic acid neutralized salt. The anti-phase agent is a mixture of ethoxylated long-chain fatty alcohol and nonylphenol polyoxyethylene ether.

[0048] The heat-tackifying emulsion polymer is prepared by the following method: 31.7% (w / w, the same below) of acrylamide, 9.5% of sodium acrylate and 2-acryla...

Embodiment 2

[0053] The thermal viscosity-increasing suspension sand-carrying agent provided in this embodiment comprises, by mass percentage, raw materials: 0.2% thermal viscosity-increasing polymer, 0.02% phase inverting agent and the balance of water.

[0054] The heat-tackifying emulsion polymer is prepared by the following method: the sand-carrying agent of the heat-tackifying emulsion polymer is a polymer of Pluronic block polyether temperature-sensitive macromolecule, anionic monomer and acrylamide monomer. The Pluronic macromolecule is block polyether F127. The anionic monomer is acrylic acid. The anti-phase agent is a mixture of ethoxylated long-chain fatty alcohol and alcohol polyoxyethylene ether.

[0055] Dissolve 31.7% (w / w, the same below) of acrylamide, 9.5% of acrylic acid, 8.6% of F127, and 5.0% of sodium chloride in deionized water (accounting for 45.2% of the total mass of the water phase), and adjust the pH =7.0, formulated as an aqueous phase. Dissolve 14.0% emulsif...

Embodiment 3

[0061] The heat-increased slick water drag reducer provided in this embodiment comprises, by mass percentage, raw materials: 0.03% heat-increased polymer, 0.003% phase inverting agent and the balance of water.

[0062] The thermal viscosity-increasing emulsion polymer is a polymer of Pluronic block polyether temperature-sensitive macromolecule, anion monomer and acrylamide monomer. The Pluronic macromolecule is block polyether F127. The anionic monomer is sodium acrylate. The reverse phase agent is ethoxylated long-chain fatty alcohol.

[0063]The heat-tackifying emulsion polymer was prepared by the following method: 23.7% (w / w, the same below) of acrylamide, 9.5% of acrylic acid, 16.6% of F127, 5.0% of sodium chloride were dissolved in deionized In water (accounting for 45.2% of the total mass of the water phase), adjust the pH=7.0 to form the water phase. Dissolve 14.0% emulsifier HB246 in mineral oil (accounting for 86.0% of the total mass of the oil phase), heat to 50°C...

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Abstract

The invention provides a fracturing fluid sand-carrying agent and a slickwater drag reducer based on a thermal tackifying emulsion polymer, and the thermal tackifying emulsion polymer is applied to the process of increasing the yield of petroleum and natural gas through hydraulic fracturing and is used for preparing the fracturing fluid sand-carrying agent or the slickwater drag reducer on site. The thermal tackifying emulsion polymer is obtained by polymerizing a temperature-sensitive macromolecule, an anionic monomer and an acrylamide monomer, and the temperature-sensitive macromolecule is apolyoxyethylene-polyoxypropylene-polyoxyethylene triblock polymer. According to the invention, the defects that a conventional fracturing fluid system needs to be dissolved and crosslinked in advance, and the fluid preparation process is tedious are overcome, and meanwhile, the defect that the sand carrying performance or the drag reduction efficiency of a traditional fracturing fluid or the slickwater drag reducer becomes poor due to thermal thinning is overcome.

Description

technical field [0001] The invention belongs to the technical fields of oilfield chemistry and petroleum and natural gas fracturing production stimulation, and particularly relates to the application of thermal viscosity-increasing emulsion polymer as a suspended sand-carrying agent in fracturing fluid and as a drag reducer in slippery water. Background technique [0002] Hydraulic fracturing is an important technical measure for increasing production of oil and natural gas wells and increasing injection of water injection wells. It is not only widely used in low permeability oil and gas reservoirs, but also has achieved good results in stimulation of medium and high permeability oil and gas reservoirs. This technology uses surface high-pressure pumps to inject high-viscosity liquid with proppant such as quartz sand or ceramsite into the well at a displacement far exceeding the absorption capacity of the formation, and build up high pressure at the bottom of the well; when th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C09K8/88C08F283/06C08F220/56
CPCC08F283/06C09K8/68C09K8/882C09K2208/28C08F220/56
Inventor 冯玉军陈昊
Owner SICHUAN UNIV
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