Wax clearing agent, preparation method and applications thereof

A technology of wax remover and pour point depressant, which is applied in the field of wax remover and its preparation, can solve the problem that ultra-deep condensate gas wells are difficult to remove blockage, etc., achieve excellent biodegradability and low temperature performance, simple composition, good wax removal effect of effect

Active Publication Date: 2019-08-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above defects, the present invention provides a wax remover and its preparation method and application, which are used to solve the technical defects in the prior art that it is difficult to remove blockages in ultra-deep condensate gas wells

Method used

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  • Wax clearing agent, preparation method and applications thereof
  • Wax clearing agent, preparation method and applications thereof
  • Wax clearing agent, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The wax remover of the present embodiment comprises the following components according to weight percentage:

[0072] Ethylene-vinyl acetate copolymer: 1.55%

[0073] Dichloroethane: 1.5%

[0074] Polyacrylate: 0.65%

[0075] Styrene: 1.5%

[0076] Dispersant: 0.3%

[0077] Penetrant: 0.2%

[0078] Pour point depressant: 0.55%

[0079] C9 aromatics: 93.75%.

[0080] The wax remover can be prepared as follows:

[0081] After batching according to the above composition, the ethylene-vinyl acetate copolymer, ethylene dichloride, polyacrylate, styrene, dispersant, penetrant, pour point depressant and carbon nine are mixed in the reactor, heated to 60 °C, stirred at a stirring speed of 250r / min for 2h, cooled to room temperature, and prepared the wax remover of this example.

Embodiment 2

[0083] The wax remover of the present embodiment comprises the following components according to weight percentage:

[0084] Ethylene-vinyl acetate copolymer: 1.5%

[0085] Dichloroethane: 1.5%

[0086] Polyacrylate: 0.6%

[0087] Styrene: 1%

[0088] Dispersant: 0.2%

[0089] Penetrant: 0.2%:

[0090] Pour point depressant: 0.15%

[0091] C9 aromatics: 94.85%

[0092] The wax remover can be prepared as follows:

[0093] After batching according to the above composition, the ethylene-vinyl acetate copolymer, ethylene dichloride, polyacrylate, styrene, dispersant, penetrant, pour point depressant and carbon nine are mixed in the reactor, heated to 50 °C, stirred at a stirring speed of 270r / min for 3h, cooled to room temperature, and prepared the wax remover of this example.

Embodiment 3

[0095] The wax remover of the present embodiment comprises the following components according to weight percentage:

[0096] Ethylene-vinyl acetate copolymer: 2%

[0097]Dichloroethane: 1.6%

[0098] Polyacrylate: 0.7%

[0099] Styrene: 1.5%

[0100] Dispersant: 0.3%

[0101] Penetrant: 0.25%

[0102] Pour point depressant: 0.17%

[0103] C9 aromatics: 93.47%

[0104] The wax remover can be prepared as follows:

[0105] After batching according to the above composition, the ethylene-vinyl acetate copolymer, ethylene dichloride, polyacrylate, styrene, dispersant, penetrant, pour point depressant and carbon nine were mixed in the reactor, and heated to 74 °C, stirred at a stirring speed of 230r / min for 4h, cooled to room temperature, and prepared the wax remover of this example.

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Abstract

The invention provides a wax clearing agent, a preparation method and applications thereof, wherein the wax clearing agent comprises, by weight, 0.1-3% of an ethylene-vinyl acetate copolymer, 1-2% ofdichloroethane, 0.5-0.8% of polyacrylate, 1-2% of styrene, 0.1-0.5% of a dispersant, 0.1-0.3% of a penetrant, 0.1-1% of a pour point depressant, and the balance of C9 aromatic hydrocarbons. In the prior art, the clogging of the ultra-deep condensate gas well is difficult to clear. According to the present invention, the wax clearing agent is used for solving the technical defect in the prior art.

Description

technical field [0001] The invention belongs to the technical field of oilfield exploitation, and in particular relates to a wax remover and its preparation method and application. Background technique [0002] In the middle and late stages of oilfield development, when the underground temperature and pressure exceed critical conditions, the gas generated by the reverse evaporation of liquid hydrocarbons is called condensate gas. Condensate gas has complex phase state and flow characteristics, especially the continental sedimentary reservoirs have the characteristics of low porosity, low permeability, strong heterogeneity, prone to reverse condensate phenomenon, easy liquid lock and other characteristics, making mining difficult . [0003] During the development process, as the formation pressure continues to decrease, the heavy hydrocarbons in the condensate gas will undergo a phase change, and condensate oil will be precipitated in the formation to form a gas-liquid two-p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524
CPCC09K8/524
Inventor 钟诚宋文文曾有信梁凌熏刘敏张雪松毛仲强文志明张庆春秦振杰刘文东罗刚李津泷缪津津袁梓钧
Owner PETROCHINA CO LTD
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