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Preparation method of oil well composite paraffin inhibitor

A technology of anti-wax agent and oil well, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem that the anti-wax effect cannot be further improved, and achieve the improvement of anti-wax effect, thermal conductivity, and anti-wax effect Effect

Inactive Publication Date: 2019-09-20
李嘉诚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is: Aiming at the problem that the anti-wax effect of traditional oil well anti-wax agents cannot be further improved, a preparation method of oil well composite anti-wax agents is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] In parts by weight, 10 parts of graphene oxide, 10 parts of aluminum hydroxide, and 40 parts of water are placed in a ball mill for ball milling and mixing for 50 minutes, and then dropwise in the ball mill, ammonia water with a mass fraction of 30% is adjusted to pH to 9.6 to obtain 1 No. mixed liquor; By weight parts, 30 parts of acrylonitrile, 20 parts of linseed oil, 8 parts of azobisisobutyronitrile, 8 parts of n-pentane, and 8 parts of methyl methacrylate are placed in a beaker, and Place the beaker in an ultrasonic disperser, and mix ultrasonically for 50 minutes at an ultrasonic frequency of 75kHz to obtain No. 2 mixed solution; put No. 2 mixed solution and No. 1 mixed solution in a shear homogenizer at a mass ratio of 1:10 , at a temperature of 5°C, shear at low temperature and high speed for 10 minutes to obtain a homogeneous mixture, then place the homogeneous mixture in a high-pressure reactor, and fill the reactor with nitrogen at a rate of 90 mL / min, and th...

example 2

[0027] In parts by weight, 10 parts of graphene oxide, 10 parts of aluminum hydroxide, and 40 parts of water are placed in a ball mill for ball milling and mixing for 50 minutes, and then dropwise in the ball mill, ammonia water with a mass fraction of 30% is adjusted to pH to 9.6 to obtain 1 No. mixed liquor; By weight parts, 30 parts of acrylonitrile, 20 parts of linseed oil, 8 parts of azobisisobutyronitrile, 8 parts of n-pentane, and 8 parts of methyl methacrylate are placed in a beaker, and Place the beaker in an ultrasonic disperser, and mix ultrasonically for 50 minutes at an ultrasonic frequency of 75kHz to obtain No. 2 mixed solution; put No. 2 mixed solution and No. 1 mixed solution in a shear homogenizer at a mass ratio of 1:10 , at a temperature of 5°C, shear at low temperature and high speed for 10 minutes to obtain a homogeneous mixture, then place the homogeneous mixture in a high-pressure reactor, and fill the reactor with nitrogen at a rate of 90 mL / min, and th...

example 3

[0029] In parts by weight, 30 parts of copper nitrate solution, 20 parts of oleic acid, 20 parts of sodium oleate, and 30 parts of ethanol are placed in a three-necked flask, and then adding a mass fraction of 30% sodium hydroxide solution to adjust the pH to 8.3, To obtain a mixed solution, then filter the mixed solution to obtain a filter residue, then place the filter residue in an oven, and dry it to a constant weight at a temperature of 110°C to obtain a dry filter residue, then place the dry filter residue in a tube furnace, and Fill the furnace with hydrogen gas at a rate of 90mL / min, and treat it in a hydrogen atmosphere at a temperature of 300°C for 3 hours, and then cool down to room temperature with the furnace to obtain pretreated nano-copper powder; in parts by weight, 40 parts Octadecyl methacrylate, 30 parts of maleic anhydride, 30 parts of styrene, 3 parts of initiator, and 80 parts of solvent are placed in a reaction kettle, and heated and stirred for 10 hours ...

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Abstract

The invention discloses a preparation method of an oil well composite paraffin inhibitor, and belongs to the technical field of oil exploitation. The method comprises the following steps: mixing octadecyl methacrylate, maleic anhydride, styrene, an initiator and a solvent, heating and stirring the mixture, and performing a reaction to obtain a mixed solution; mixing and fermenting glass fibers, yeast powder, starch and water, adding pig blood by 0.2-0.3 time by mass of the glass fibers and hirudin by 0.02-0.03 time by mass of the glass fibers, stirring and mixing all the components, and drying, crushing and sieving the mixture to obtain modified glass fibers; and stirring and mixing, by weight, 20-30 parts of the mixed solution, 8-10 parts of the modified glass fibers, 3-5 parts of a surfactant, 20-30 parts of water, 10-20 parts of a modified additive and 10-20 parts of pretreated nano copper powder to obtain the oil well composite paraffin inhibitor. The paraffin inhibitor has an excellent paraffin inhibition effect.

Description

technical field [0001] The invention discloses a preparation method of an oil well composite wax inhibitor, which belongs to the technical field of petroleum exploitation. Background technique [0002] Crude oil is mostly rich in wax. During the production process, as the temperature and pressure drop, the wax in crude oil will gradually precipitate and deposit around the well wall and in the production casing, causing damage to the reservoir. Common wax inhibitors include fused ring aromatic hydrocarbons, surfactants and high molecular polymers. Among them, polymer wax inhibitors are widely used in oil fields. Most of the high-molecular wax inhibitors are oil-soluble and are branched-chain high-molecular polymers containing paraffin chains. When it is used, it is injected into the well and mixed with crude oil, and when the content is very low, it can form a network structure throughout the crude oil tissue. If the temperature of crude oil is lowered, paraffin wax will b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524
CPCC09K8/524
Inventor 李嘉诚
Owner 李嘉诚
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