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Water-in-oil type nano-emulsion, nano-emulsion composite response type variable-viscosity acid thickening agent and preparation methods of water-in-oil type nano-emulsion and nano-emulsion composite response type variable-viscosity acid thickening agent

A nano-emulsion, water-in-oil technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of weak viscosity-increasing ability, poor temperature and acid resistance stability, and poor shear resistance of thickeners.

Active Publication Date: 2021-09-10
SHANDONG NUOER BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing thickeners have poor shear resistance, weak thickening ability, and poor temperature and acid resistance stability. Aiming at the defects in the prior art, a water-in-oil nanoemulsion, Nanoemulsion composite response type viscosifying acid thickener and preparation method thereof

Method used

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  • Water-in-oil type nano-emulsion, nano-emulsion composite response type variable-viscosity acid thickening agent and preparation methods of water-in-oil type nano-emulsion and nano-emulsion composite response type variable-viscosity acid thickening agent
  • Water-in-oil type nano-emulsion, nano-emulsion composite response type variable-viscosity acid thickening agent and preparation methods of water-in-oil type nano-emulsion and nano-emulsion composite response type variable-viscosity acid thickening agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] In this example, a nanoemulsion composite response type viscosity-changing acid thickener is prepared through the following steps

[0061] (1) Preparation of ultrafine powder of thickener

[0062] The preparation of the thickener consists of the following raw materials in parts by weight: 10 parts of acrylamide, 40 parts of acryloyl morpholine, 120 parts of methacryloyloxyethyltrimethylammonium chloride, N , N - 50 parts of dimethylacrylamide, 0.5 part of trimethylolpropane triacrylate, 0.5 part of dodecyl mercaptan, 0.1 part of azobisisobutyronitrile, 0.1 part of potassium persulfate, 0.2 part of sodium bisulfite , 750 parts of water; the preparation method is: acrylamide, acryloylmorpholine, methacryloyloxyethyltrimethylammonium chloride, N , N -After mixing dimethylacrylamide, trimethylolpropane triacrylate and water thoroughly, adjust the pH value to 4.0, then add dodecylmercaptan, potassium persulfate and azobisisobutyronitrile and stir for 30min , transferred ...

Embodiment 2

[0073] In this example, a nanoemulsion composite response type viscosity-changing acid thickener is prepared through the following steps

[0074] (1) Preparation of ultrafine powder of thickener

[0075] The preparation of the thickener consists of the following raw materials in parts by weight: 20 parts of acrylamide, 60 parts of acryloyl morpholine, 140 parts of methacryloyloxyethyltrimethylammonium chloride, N , N - 70 parts of diethylacrylamide, 0.7 parts of tripropylene glycol diacrylate, 0.7 parts of tert-dodecyl mercaptan, 0.25 parts of azobisisobutyronitrile, 0.15 parts of potassium persulfate, 0.3 parts of sodium bisulfite, water 700 copies;

[0076] The preparation method is: acrylamide, acryloylmorpholine, methacryloyloxyethyltrimethylammonium chloride, N , N - After diethylacrylamide, tripropylene glycol diacrylate and water are fully mixed, adjust the pH value to 4.5, then add tert-dodecylmercaptan, potassium persulfate and azobisisobutyronitrile and stir for ...

Embodiment 3

[0087] In this example, a nanoemulsion composite response type viscosity-changing acid thickener is prepared through the following steps

[0088] (1) Preparation of ultrafine powder of thickener

[0089] The thickener is prepared from the following raw materials in parts by weight: 30 parts of acrylamide, 80 parts of acryloyl morpholine, 160 parts of methacryloyloxyethyltrimethylammonium chloride, N - 90 parts of isopropylacrylamide, 1 part of trimethylolpropane triacrylate, 1 part of dodecyl mercaptan, 0.5 parts of azobisisobutyronitrile, 0.2 parts of potassium persulfate, 0.4 parts of sodium bisulfite , 650 parts of water;

[0090] The preparation method is: acrylamide, acryloylmorpholine, methacryloyloxyethyltrimethylammonium chloride, N -After mixing isopropylacrylamide, trimethylolpropane triacrylate and water well, adjust the pH value to 5.0, then add dodecylmercaptan, potassium persulfate and azobisisobutyronitrile and stir for 30min , transferred to the reaction ket...

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Abstract

The invention relates to the technical field of oil and gas field development, and provides a water-in-oil nano-emulsion, a nano-emulsion composite response type variable-viscosity acid thickening agent and preparation methods of the water-in-oil type nano-emulsion and the nano-emulsion composite response type variable-viscosity acid thickening agent. The nano-emulsion composite response type variable-viscosity acid thickening agent is composed of the following components in parts by weight: 200-350 parts of thickening agent ultrafine powder, 15-20 parts of a coating agent, 5-10 parts of an activating agent, 135-235 parts of white oil, and 390-650 parts of the water-in-oil type nano-emulsion. According to the thickening agent, ultrafine powder is used as a core, a suspension system is used as a middle layer, and the nano-emulsion is used as an outer layer; the nano-emulsion comprises a water phase, an oil phase and a phase inversion agent, and is a copolymer of acrylamide, acryloylmorpholine, a tackifying monomer, dimethyl diallyl ammonium chloride and a hydrophobic monomer; the ultrafine powder is a copolymer of acrylamide, acryloyl morpholine, a cationic monomer and a response monomer; the suspension system is a coating system composed of a coating agent, an activating agent and white oil, and is suitable for acidification construction operation of oil and gas fields of deep wells and ultra-deep wells.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a water-in-oil nano-emulsion, a nano-emulsion composite response type viscosity-changing acid thickener and a preparation method thereof. Background technique [0002] At present, thickened acid technology has been widely valued as an important technology and development method for increasing production and injection, and has played an important role in carbonate reservoirs and some sandstone reservoirs. In this technology, the chemical reaction between the acid liquid and the formation rock is carried out in three steps: ① hydrogen ions are transferred from the acid liquid to the rock surface; ② hydrogen ions react with reactive rock minerals; ③ the reaction products diffuse into the acid liquid. It is found through experiments that the reaction rate of the first step in the three-step reaction is the slowest, and this step also determines the overall speed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/34C08F220/54C08F220/58C08F220/56C08F230/08C08F226/02C08F220/18C09K8/64C09K8/68C09K8/72C09K8/88
CPCC08F220/34C08F220/58C08F230/085C09K8/725C09K8/68C09K8/882C09K8/64C09K2208/10C08F220/54C08F220/56C08F226/02C08F220/1818
Inventor 荣敏杰孙建波许永升于庆华荣帅帅
Owner SHANDONG NUOER BIOLOGICAL TECH
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