Tackifier for drilling fluid and preparation method thereof

A technology of tackifier and drilling fluid, applied in the field of tackifier for drilling fluid and its preparation, can solve the problems of low temperature resistance, poor high temperature stability of temperature resistance, etc., achieve strong rock-carrying energy, improve lubricity, The effect of hydrodynamic volume increase

Active Publication Date: 2022-07-29
SHANDONG NUOER BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the deepening of drilling and production, in carbonate reservoirs and buried hill reservoirs, the temperature resistance and high temperature stability of the existing solid-free drilling fluid system are still poor
The rheology, fluid loss and wall-building properties of solid-free drilling fluid are mainly adjusted by viscosifiers, and the drilling fluid system is mainly constructed with viscosifiers, but the commonly used The temperature resistance in the relative drilling fluid is lower than 150°C

Method used

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  • Tackifier for drilling fluid and preparation method thereof
  • Tackifier for drilling fluid and preparation method thereof
  • Tackifier for drilling fluid and preparation method thereof

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preparation example Construction

[0039] The invention provides a preparation method of a viscosity enhancer for drilling fluid, the preparation method comprising:

[0040] The quaternization reaction of unsaturated amino acid ester and halogenated alkane is carried out to obtain long-chain hydrophobic monomer;

[0041] The long-chain hydrophobic monomer, acrylamide, acrylic acid, sulfonic acid-based monomer, surfactant, deionized water, pH adjuster and initiator are polymerized to obtain a tackifier for drilling fluid;

[0042] The parts by weight of the raw materials used in the preparation of the tackifier for drilling fluids are as follows: 3 to 8 parts of long-chain hydrophobic monomers (for example, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts or 8 parts), 150-180 parts of acrylamide (for example, it can be 150 parts, 152 parts, 155 parts, 160 parts, 165 parts, 170 parts, 175 parts or 180 parts), acrylic acid 40-70 parts (for example, it can be 40 parts, 45 parts parts, 50 parts, 55 parts, 60 parts, 65 p...

Embodiment 1

[0087] Preparation of long-chain hydrophobic monomers:

[0088] 157 parts of dimethylaminoethyl methacrylate and 52 parts of deionized water were added to the reactor, and after thorough mixing, 204 parts of 1-chlorododecane was added dropwise at 25°C, and the temperature range was controlled to be 40-45 ℃, after the dropwise addition is completed, keep the temperature at 40~45 ℃ for 5 hours, then add 7 parts of acetic acid and mix well to obtain a long-chain hydrophobic monomer.

[0089] Preparation of viscosifier for drilling fluid:

[0090] 3 parts of long-chain hydrophobic monomer, 150 parts of acrylamide, 40 parts of acrylic acid, 5 parts of sodium 2-acrylamido-2-methylpropanesulfonate, 0.1 part of tetrabutylammonium bromide and 771 parts of deionized water Mix well to obtain a mixed solution, add 31 parts of potassium hydroxide to the mixed solution, adjust the pH to 7.1, and then add 0.006 part of initiator (including 0.002 part of sodium hypophosphite and 0.002 part of ...

Embodiment 2

[0092] Preparation of long-chain hydrophobic monomers:

[0093] 190 parts of dimethylaminoethyl methacrylate and 60 parts of deionized water were added to the reactor, and after thorough mixing, 263 parts of 1-chlorotridecane was added dropwise at 25°C, and the temperature range was controlled to be 40-45 ℃, after the dropwise addition is completed, keep the temperature at 40~45℃ for 7 hours, then add 10 parts of acetic acid and mix well to obtain a long-chain hydrophobic monomer.

[0094] Preparation of viscosifier for drilling fluid:

[0095] 8 parts of long-chain hydrophobic monomers, 180 parts of acrylamide, 70 parts of acrylic acid, 20 parts of sodium 2-acrylamido-2-methylpropanesulfonate, 0.5 parts of tetrabutylammonium bromide and 667 parts of deionized water Mix well to obtain a mixed solution, add 55 parts of potassium hydroxide to the mixed solution, adjust the pH to 7.5, and then add 0.01 part of an initiator (including 0.003 part of sodium hypophosphite and 0.004 ...

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Abstract

The invention provides a tackifier for drilling fluid and a preparation method of the tackifier, and relates to the field of oilfield drilling and high-molecular polymerization, the method comprises the following steps: performing quaternization reaction on unsaturated amino acid ester and halogenated alkane to obtain a long-chain hydrophobic monomer; a long-chain hydrophobic monomer, acrylamide, acrylic acid, a sulfonic monomer, a surfactant, deionized water, a pH regulator and an initiator are subjected to a polymerization reaction, and the tackifier for the drilling fluid is obtained. The tackifier for the drilling fluid prepared by the invention is excellent in dissolving property, good in temperature resistance and salt resistance, and strong in rock carrying capacity, tackifying capacity, flow regulating capacity and hydration dispersing capacity for inhibiting clay and drilling cuttings, and the temperature resistance and high-temperature stability of the solid-free drilling fluid can be improved.

Description

technical field [0001] The invention relates to the technical field of oil field drilling and polymer polymerization, in particular to a thickener for drilling fluid and a preparation method thereof. Background technique [0002] With the substantial increase in total energy consumption and the development of drilling technology, drilling operations have higher and higher requirements on the high temperature resistance and stability of the drilling fluid system. The traditional solid phase high temperature resistant drilling fluid system has serious leakage during the drilling process, and the harmful solid phase enters the deep fractures and blocks the fracture channels, which affects the productivity recovery of the oil and gas fields in the later stage. The damage seriously restricts the development of deep fractured oil and gas reservoirs. [0003] The solid-free drilling fluid is a clay-free drilling fluid. The system does not contain clay, and only adding high molecul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/34C08F220/06C08F220/58C08F212/14C09K8/035
CPCC08F220/56C09K8/035C09K2208/34C08F220/34C08F220/06C08F220/585C08F212/30
Inventor 荣敏杰于朋朋许永升于庆华荣帅帅
Owner SHANDONG NUOER BIOLOGICAL TECH
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