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Phosphonic acid base containing polymer and application thereof as well as phosphonic acid base containing polymer drilling fluid viscosity reducer

A polymer, phosphonic acid-based technology, used in drilling compositions, chemical instruments and methods, etc., can solve the problems of poor viscosity reduction effect, and achieve the effect of good temperature resistance and salt resistance, and excellent viscosity reduction effect.

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect that the viscosity reducing effect of the existing drilling fluid viscosity reducer is poor after high temperature aging in brine drilling fluid and high density drilling fluid, and to provide a kind of viscosity reducing agent in brine drilling fluid and high density drilling fluid A phosphonic acid-based polymer that still has a good viscosity-reducing effect after high-temperature aging, the application of the phosphonic acid-based polymer as a drilling fluid viscosity reducer, and a phosphonic acid-based polymer drilling fluid viscosity reducer

Method used

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  • Phosphonic acid base containing polymer and application thereof as well as phosphonic acid base containing polymer drilling fluid viscosity reducer
  • Phosphonic acid base containing polymer and application thereof as well as phosphonic acid base containing polymer drilling fluid viscosity reducer
  • Phosphonic acid base containing polymer and application thereof as well as phosphonic acid base containing polymer drilling fluid viscosity reducer

Examples

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Embodiment 1

[0045] This example is used to illustrate the preparation method of the phosphonic acid group-containing polymer and the phosphonic acid group-containing polymer drilling fluid viscosity reducer provided by the present invention.

[0046] 2-acrylamido-2-methylpropanephosphonic acid (AMPP) and 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and acrylic acid (AA), according to the material ratio of 85%: 10 %: 5% is mixed and dissolved in water to form a monomer mixture aqueous solution with a mass fraction of 35%, and ammonium persulfate accounting for 3% of the total mass of the monomer mixture is formulated into an aqueous solution with a mass fraction of 10%. 1.5% thioglycolic acid (TGA) of the total mass of the monomer mixture is dissolved in water (the weight of water in which thioglycolic acid is dissolved is twice the total mass of the monomer mixture) and added to the reaction kettle to raise the temperature to 65°C, and then the monomer water mixture solution and ammon...

Embodiment 2-9

[0048] Examples 2-9 are used to illustrate the preparation method of the phosphonic acid group-containing polymer and the phosphonic acid group-containing polymer drilling fluid viscosity reducer provided by the present invention.

[0049] Prepare phosphonic acid-based polymer and phosphonic acid-based polymer drilling fluid viscosity reducer according to the method of Example 1. The difference is that the number average molecular weight Mn of the specific reaction substance, reaction conditions and the drilling fluid viscosity reducer obtained is as follows Table 1 shows:

[0050] Table 1

[0051]

[0052] Note: In Table 1, the amount of initiator and molecular weight regulator refers to the percentage of total monomer mass, for example, in Example 1, "ammonium persulfate, 3.5%" means that the initiator is ammonium persulfate, and The amount of ammonium persulfate accounts for 3.5% of the total mass of the monomers; "IPA, 4%" means that the molecular weight regulator is I...

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Abstract

The invention provides a phosphonic acid base containing polymer and an application thereof as well as a phosphonic acid base containing polymer drilling fluid viscosity reducer. The phosphonic acid base containing polymer contains a structural unit shown as a formula (1), a structural unit shown as a formula (2), a structural unit shown as a formula (3) and / or a structural unit shown as a formula (4). The ratio of the mole number of the structural unit shown as the formula (1), the mole number of the structural unit shown as the formula (2) and the total mole number of the structural unit shown as formulae (3) and (4) is (10-85):(10-75):(5-55). The phosphonic acid base containing polymer aged at high temperatures in saline drilling fluids and high density drilling fluids still has a more excellent viscosity reducing effect.

Description

technical field [0001] The invention relates to a phosphonic acid group-containing polymer, the application of the phosphonic acid group-containing polymer as a drilling fluid viscosity reducer and a phosphonic acid group-containing polymer drilling fluid viscosity reducer. Background technique [0002] During the drilling process of deep and ultra-deep wells, because the drilling fluid is kept at high temperature for a long time, the high-temperature dispersion of clay and cuttings in the drilling fluid will cause the high-temperature thickening of the drilling fluid, resulting in an increase in the viscosity of the drilling fluid and rheological properties. worse. With the deep development of oil and gas exploration and development, the drilling encounters more and more complex formations, and the requirements for drilling fluids are more stringent. For this reason, around the needs of ultra-deep well drilling, countries around the world have carried out a series of resea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F230/02C08F220/58C08F228/02C08F212/14C08F220/06C08F222/02C08F222/06C09K8/035
CPCC09K8/035C09K8/24C09K8/5083C08F212/30C08F220/585C08F230/02C08F220/06C08F222/06C08F222/02C08F228/00C08F228/02C08F212/14
Inventor 王中华
Owner CHINA PETROLEUM & CHEM CORP
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