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Wax crystal dispersing agent for reviving high-wax-content condensate gas reservoir and preparation method of wax crystal dispersing agent

A condensate gas reservoir and dispersant technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as blockage of oil and gas channels, wellbore wax formation, and normal production, and achieve low-temperature dispersion with fast speed and low cost. Low, solve the effect of serious wax deposition

Active Publication Date: 2022-01-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a wax crystal disperser capable of quickly dispersing and dissolving wax blocks in order to solve the existing problems and deficiencies such as serious wellbore wax deposition, blockage of oil and gas passages, and influence on normal production during the exploitation of high-waxy condensate gas reservoirs in Fuxing. The wax crystal dispersant has the advantages of fast dispersion at low temperature, irreversible temperature reduction after dispersion, colorless, odorless, environmentally friendly, and does not affect the properties of crude oil in the block.

Method used

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  • Wax crystal dispersing agent for reviving high-wax-content condensate gas reservoir and preparation method of wax crystal dispersing agent
  • Wax crystal dispersing agent for reviving high-wax-content condensate gas reservoir and preparation method of wax crystal dispersing agent
  • Wax crystal dispersing agent for reviving high-wax-content condensate gas reservoir and preparation method of wax crystal dispersing agent

Examples

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Comparison scheme
Effect test

Embodiment 1

[0035] A wax crystal dispersant for rejuvenating high-wax condensate gas reservoirs, the preparation method of which comprises the following steps:

[0036] Measure 325ml of organic solvent (20vol% n-hexane + 20vol% n-heptane + 10vol n-octane and 50vol% n-nonane) into the stirring container, adjust the stirrer speed until the vortex formed by the liquid can see the stirrer paddle Add 90ml of n-butanol to the above-mentioned mother liquor until the top of the leaf axis, stir well for 15-30min until fully dissolved, then add 40ml of alkylphenol polyoxyethylene and 20ml of polyether modified siloxane betaine surfactant in Stir in a 40°C reactor until fully dissolved into a homogeneous solution, then add 5ml of ethylene glycol butyl ether and stir in a 60°C reactor for 15-30min, and finally add 20ml of ethanol, stir well for 15-30mim until evenly mixed, and the described Wax crystal dispersant.

[0037] The wax crystal dispersant described in this example is used as a low-tempera...

Embodiment 2

[0043] A wax crystal dispersant for rejuvenating high-wax condensate gas reservoirs, the preparation method of which comprises the following steps:

[0044] Measure 250ml of organic solvent (45vol% n-hexane + 30vol% n-heptane + 20vol% n-octane and 5vol% n-nonane) into the stirring container, adjust the stirrer speed until the vortex formed by the liquid can see the stirrer Add 60ml of n-butanol to the above mother liquor until the top of the paddle axis, stir well for 15-30min until fully dissolved, then add 75ml of alkylphenol polyoxyethylene ether and 40ml of polyether modified siloxane betaine Stir in a reactor at 40°C until fully dissolved into a uniform solution, then add 35ml of butyl glycol ether and stir in a reactor at 60°C for 15-30min, and finally add 40ml of ethanol and stir thoroughly for 15-30mim until evenly mixed.

[0045]The wax crystal dispersant described in this example is used as a low-temperature rapid wax crystal dispersant for the wellbore wax sample of...

Embodiment 3

[0047] A wax crystal dispersant for rejuvenating high-wax condensate gas reservoirs, the preparation method of which comprises the following steps:

[0048] Measure 300ml of organic solvent (30vol% n-hexane + 25vol% n-heptane + 30vol% n-octane and 15vol% n-nonane) into the stirring container, adjust the stirrer speed until the vortex formed by the liquid can see the stirrer Add 75ml of n-butanol to the above mother liquor until it reaches the top of the central axis of the paddle, stir well for 15-30min until fully dissolved, then add 50ml of alkylphenol polyoxyethylene ether and 30ml of polyether modified siloxane betaine Stir in a 40°C reactor until fully dissolved into a homogeneous solution, then add 15ml of ethylene glycol butyl ether and stir in a 60°C reactor for 15-30min, finally add 30ml of ethanol, and stir for 15-30mim until evenly mixed.

[0049] The wax crystal dispersant described in this example is used as a low-temperature rapid wax crystal dispersant for the w...

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Abstract

The invention discloses a wax crystal dispersing agent for reviving a high-wax-content condensate gas reservoir. The wax crystal dispersing agent comprises the following components in percentage by mass: 50-65% of an organic solvent A, 12-18% of an organic solvent B, 8-15% of a penetrating agent, 4-10% of a dispersing agent, 1-8% of a synergist and 4-10% of a mutual solvent. The wax crystal dispersing agent can quickly disperse and dissolve wax blocks, has the advantages of high low-temperature dispersion speed, irreversibility along with temperature reduction after dispersion, no color, no odor, environmental friendliness, no influence on the properties of crude oil in the block and the like, can effectively solve the problems of serious wax precipitation, oil and gas channel blockage and the like of a high-wax-content condensate gas reservoir shaft, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a wax crystal dispersant for rejuvenating high-wax condensate gas reservoirs and a preparation method thereof. Background technique [0002] During the development of waxy crude oil, the production problems caused by waxy crude oil are very prominent. During the production of Jurassic continental shale oil and gas reservoirs in Fuxing, all the wells produced oil and gas at the same time, and the crude oil contained wax to varying degrees. During the test production process, there were problems such as serious wax deposition and blockage in the wellbore, which affected normal production and even caused lying wells. [0003] At present, the wax removers commonly used in oil wells containing aromatic hydrocarbons such as benzene mainly dissolve wax samples, and the dissolved wax samples flow out with the wellbore liquid, but the melting point of the wax samp...

Claims

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Application Information

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IPC IPC(8): C09K8/524
CPCC09K8/524
Inventor 张炜徐毓珠吴仲岿周青松邓明坚周朝
Owner CHINA PETROLEUM & CHEM CORP
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