A kind of oil well chemical wax remover, its preparation method and application and oil well wax removal method

A wax remover and oil well technology, applied in the field of oil well chemical wax remover, oil well wax remover, can solve the problems of oil-based wax remover hidden safety hazards, etc., to improve the fluidity of crude oil, change the polarity, and reduce the viscosity of crude oil Effect

Active Publication Date: 2022-08-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, oil-based wax removers have potential safety hazards

Method used

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  • A kind of oil well chemical wax remover, its preparation method and application and oil well wax removal method
  • A kind of oil well chemical wax remover, its preparation method and application and oil well wax removal method
  • A kind of oil well chemical wax remover, its preparation method and application and oil well wax removal method

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0073] [1] Li Jinshuang. Study on the preparation of petroleum carboxylate [D]. Daqing Petroleum Institute, 2007.;

[0074] [2] Fu Xiaotai, Yang Youzhen. Analysis of Petroleum Carboxylate Surfactant Solution System [J]. Chemistry and Adhesion, 1995 (1): 22-2.

[0075] [3] Wu Yihui, Huang Hongdu, Wang Youfu, et al. Determination of Petroleum Carboxylates and Sulfonates in Mixed Solutions [J], Oilfield Chemistry, 2000, 17(3): 281-284.

[0076] [4] Zou Xinfang, Kong Yan, Gong Jihai, et al. Detection method of carboxylate surfactant in produced fluid of ASP flooding [J]. Daqing Petroleum Geology and Development, 2003, 22(2):58-60.

[0077] Determination method of wax prevention rate and viscosity reduction rate: according to the standard of "SY / T 6300-2009 Technical Conditions for Oil Recovery Cleaners and Wax Preventers".

Embodiment 1

[0082] The oil well temperature is higher, using sodium persulfate without catalyst.

[0083] Preparation of wax remover: put 10g of crude oil into the reactor, add 20g of water, turn on heating and stirring, set the reaction temperature to 80°C, add 5g of sodium persulfate, react for 2h, adjust the pH of the reaction solution to 10, and obtain Contains carboxylate surfactant solution (use step-by-step titration method to measure the content of carboxylate surfactant), then add 5g ethylene glycol monobutyl ether to prepare wax remover; and according to SY / T 6300- The 2009 method was used to determine the wax prevention rate and viscosity reduction rate of the wax remover on crude oil samples. The test results are shown in Table 2.

Embodiment 2

[0085] Oil well temperature is low, use sodium persulfate, add catalyst.

[0086] Preparation of wax remover: put 10g of crude oil into the reactor, add 20g of water, turn on heating and stirring, set the reaction temperature to 40°C, add 5g of sodium persulfate, add 1g of ferrous sulfate, and after the reaction for 2h, adjust the concentration of the reaction solution. The pH value is 10, and a solution containing carboxylate surfactant is obtained (the content of carboxylate surfactant is determined by the method of step-by-step titration), then 5g of isopropanol is added, and it is determined according to the method of SY / T 6300-2009 The wax-prevention rate and viscosity-reduction rate of the wax remover for crude oil samples are shown in Table 2 for the test results.

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Abstract

The invention relates to an oil well chemical wax remover, a preparation method and application thereof, and an oil well wax removal method. The oil well chemical wax remover, calculated on the basis of 100% of the total mass of the wax remover, comprises the following components: 1-10% of C10-C18 hydrocarbyl carboxylates, 8-30% of C4-C17 mixed hydrocarbons, and alcohol ethers Solvent 5‑25%, water 35‑84%. The invention provides an oil well chemical wax remover and its preparation method and application. The wax remover of the invention is an emulsion type wax remover, which is safe to operate, has good solubility and dispersibility with the wax of oil wells, and has good wax removing and preventing effect.

Description

technical field [0001] The invention belongs to the technical field of oilfield oil recovery, and relates to an oil well chemical wax remover, a preparation method and application thereof, and an oil well wax removal method. Background technique [0002] Under the conditions of high temperature and high pressure in the oil layer, wax usually exists in the crude oil in a dissolved state. However, in the process of crude oil extraction, the temperature and pressure are continuously reduced. When the temperature and pressure drop to a certain value, the dissolved wax in the crude oil begins to precipitate. As the pressure and temperature continue to decrease and the light components continue to overflow, the wax in the crude oil is continuously precipitated, crystallized, grown, aggregated, and deposited on the surface of the sucker rod and the inner wall of the oil pipe. [0003] The paraffin deposited in the tubing string and the oil pipeline on the ground will reduce or eve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/524E21B37/06
CPCC09K8/524E21B37/06
Inventor 秦冰杨春鹏赵锐
Owner CHINA PETROLEUM & CHEM CORP
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