Environment-friendly tackifier for oil-based drilling fluid and preparation method thereof

A technology of oil-based drilling fluid and viscosifier, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., and can solve the problems of environmental protection of oil-based drilling fluid, increase of organic soil, and filter reduction of oil-based drilling fluid Problems such as the addition of materials such as loss agent polymers and the increase in the cost of oil-based drilling fluid preparation have achieved good effects of increasing viscosity and cutting, reducing preparation costs, and improving environmental performance.

Active Publication Date: 2013-06-12
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the technical field of oil-based drilling fluid viscosifiers, the current research mainly has the following technical problems: one, water-based drilling fluid viscosifiers are not suitable for oil-based drilling fluids
The viscosification of oil-based drilling fluids is currently mainly achieved by the incidental viscosification of materials such as organic soil and oil-based drilling fluid fluid loss control polymers. There is a lack of effective oil-based drilling fluid viscosifiers, and sometimes it is not enough to meet the requirements. Drilling fluid viscosity and shear force will increase the amount of organic soil, oil-based drilling fluid fluid loss control polymer and other materials, resulting in an increase in the cost of oil-based drilling fluid preparation
Third, the environmental protection of oil-based drilling fluid needs to be improved

Method used

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  • Environment-friendly tackifier for oil-based drilling fluid and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides an environment-friendly oil-based drilling fluid viscosifier, the preparation method of which comprises the following steps:

[0029] Under stirring conditions, add 3.0g of N,N'-methylenebisacrylamide into 30mL of water and fully dissolve; add 6.0g of 2-acrylamido-2-methylpropanesulfonic acid and continue stirring to fully dissolve After adding 0.2g polyvinylpyrrolidone, continue to stir to make it fully dissolved; add 0.05g potassium persulfate, continue to stir to make it fully dissolve, and form an aqueous phase solution;

[0030] Under stirring conditions, dissolve 1.25g of Span 80 in 2.0mL of simethicone oil to form an oil phase solution;

[0031] Under stirring conditions, slowly drop the water phase solution into the oil phase solution through a separatory funnel, then add 0.05 g of ferrous sulfate, and stir evenly to form a mixed solution;

[0032] The mixed solution was polymerized for 4 hours in a water bath at 50°C under stirring con...

Embodiment 2

[0035] This embodiment provides an environment-friendly oil-based drilling fluid viscosifier, the preparation method of which comprises the following steps:

[0036] Under stirring conditions, add 6.0g of methacrylamide into 40mL of water and fully dissolve it; add 12.0g of 3-morpholine propanesulfonic acid and continue to stir to fully dissolve it; add 0.8g of N-vinylpyrrolidone and continue to stir After making it fully dissolved; add 0.15g ammonium persulfate, continue stirring to make it fully dissolved, and form an aqueous phase solution;

[0037] Under stirring conditions, dissolve 2.75g Tween 60 in 6.0mL white oil to form an oil phase solution;

[0038] Under the condition of stirring, slowly drop the water phase solution into the oil phase solution through a separatory funnel, then add 0.15 g of sodium sulfite, and stir evenly to form a mixed solution;

[0039] The mixed solution was polymerized for 6 hours in a water bath at 70°C under stirring conditions to obtain a...

Embodiment 3

[0042] This embodiment provides an environment-friendly oil-based drilling fluid viscosifier, the preparation method of which comprises the following steps:

[0043] Under stirring conditions, add 7.5g of N-hydroxyacrylamide into 50mL of water and fully dissolve; add 18.0g of 3-hydroxy-1-propanesulfonic acid and continue to stir to fully dissolve; add 1.5g of α-pyrrolidone and continue to stir Make it fully dissolved; add 0.25g of azobisisobutyronitrile, continue stirring to make it fully dissolved, and form an aqueous phase solution;

[0044] Under stirring conditions, dissolve 4.25g emulsifier TX-100 in 10.0mL corn oil to form an oil phase solution;

[0045] Under stirring conditions, slowly drop the aqueous phase solution into the oil phase solution through a separatory funnel, then add 0.25 g of sodium bisulfite, and stir evenly to form a mixed solution;

[0046] The mixed solution was polymerized for 8 hours in a water bath at 80°C under stirring conditions to obtain a p...

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Abstract

The invention relates to an environment-friendly tackifier for oil-based drilling fluid and a preparation method thereof. The environment-friendly tackifier for oil-based drilling fluid comprises the following raw materials by weight: 10 to 50 parts of water, 3.0 to 7.5 parts of a non-ionic monomer, 6.0 to 18.0 parts of an anionic monomer, 0.2 to 1.5 parts of a water-soluble monomer, 0.05 to 0.25 part of an oxidant, 2.0 to 10.0 parts of base oil, 1.25 to 4.25 parts of an emulsifying agent and 0.05 to 0.25 part of a reducing agent. According to the preparation method for the environment-friendly tackifier, inverse emulsion polymerization is utilized, the non-ionic monomer, the anionic monomer and the water-soluble monomer are subjected to a reaction in an oil phase solution and undergo polymerization under initiation of the oxidant and the reducing agent, and polymer emulsion is subjected to purification and drying so as to obtain the environment-friendly tackifier for the oil-based drilling fluid. The environment-friendly tackifier for the oil-based drilling fluid provided by the invention is beneficial for reducing preparation cost for the oil-based drilling fluid and improving environmental protection performance of the oil-based drilling fluid.

Description

technical field [0001] The invention relates to an environment-friendly oil-based drilling fluid viscosifier and a preparation method thereof, belonging to the technical field of petroleum exploitation. Background technique [0002] Oil-based drilling fluid is a drilling fluid with oil as the continuous phase. It is divided into two types: water-in-oil oil-based drilling fluid and full oil-based drilling fluid. It is mainly composed of base oil, organic soil, emulsifier, wetting agent, tackifier and weighting agent. Oil-based drilling fluid has good inhibition, temperature resistance and stability, and can better meet the needs of special situations such as drilling in complex formations, coring operations, underbalanced drilling, and long-length horizontal wells. It can provide safe and efficient oil and gas fields. Development provides reliable technical support. [0003] Oil-based drilling fluid viscosifier is an important component of oil-based drilling fluid. Its main...

Claims

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Application Information

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IPC IPC(8): C09K8/035C09K8/32C08F220/58C08F222/38C08F220/56C08F226/10C08F2/32C08F4/40
Inventor 邓皓谢水祥王蓉沙岳勇许毓任雯刘鹏张明栋刘晓辉程泽生孙静文刘娉婷
Owner PETROCHINA CO LTD
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