Emulsion type crude oil viscosity-reduction drag reduction agent applied to high-wax-content pure oil pipe transportation

A technology of drag reducer and emulsion type, which is applied in the field of emulsion type crude oil viscosity reducer and drag reducer, which can solve the problems of increased back pressure and reduced pipeline transportation capacity, and achieve the effects of low freezing point, safe low temperature transportation and good storage

Active Publication Date: 2015-12-23
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to overcome the problems of wax analysis in the pipeline network in winter and serious deposition of waxy asphaltenes on the pipe wall in the background technology, which greatly reduces the pipeline transportation capacity, and the increase of back pressure affects the safe transportation of crude oil, and provides a method for high-concentration crude oil. Emulsion crude oil viscosity and drag reducer for pure wax oil pipeline transportation

Method used

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  • Emulsion type crude oil viscosity-reduction drag reduction agent applied to high-wax-content pure oil pipe transportation
  • Emulsion type crude oil viscosity-reduction drag reduction agent applied to high-wax-content pure oil pipe transportation
  • Emulsion type crude oil viscosity-reduction drag reduction agent applied to high-wax-content pure oil pipe transportation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 2g of MSA, 3.5g of polyolefin drag reducer polyalphaolefin, 3.6g of octanol, 0.32g of S-80, 0.18g of T-60, 0.4g of ethylene glycol monobutyl ether, mix and prepare emulsion type crude oil Viscosity reducer.

Embodiment 2

[0019] Weigh 3g of EVA, 2g of polyolefin drag reducer polyalphaolefin, 3.6g of 2-hexanol, 0.64g of S-80, 0.36g of T-60, 0.4g of ethylene glycol monobutyl ether, and mix to prepare the emulsion Viscosity and drag reducer for crude oil.

[0020] Indoor experiment effect:

[0021] 1. Performance evaluation of viscosity reduction and pour point reduction

[0022] Experimental procedure: the products obtained in the above-mentioned Examples 1 and 2 are respectively defined as 1# and 2# viscosity-reducing and drag-reducing agents; Daqing crude oil samples are respectively added with 100 ppm each of 1# and 2# viscosity-reducing and drag-reducing agents, and after 70 After treatment at ℃, the temperature was lowered to 25℃ at a cooling rate of 0.5℃ / min, and the results of freezing point and viscosity were compared as shown in Table 1 and Table 2.

[0023] Table 1 Comparison of freezing points of Daqing crude oil samples before and after adding viscosity-reducing agent

[0024]

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Abstract

The invention relates to an emulsion type crude oil viscosity-reduction drag reduction agent applied to high-wax-content pure oil pipe transportation. The emulsion type crude oil viscosity-reduction drag reduction agent mainly solves the problems that in the prior art, wax crystallization of a pipe network exists and wax asphaltene deposition of a pipe wall are serious in winter, and consequently the pipe transportation capability is greatly lowered, and safety transportation of crude oil is affected by return pressure rising. The emulsion type crude oil viscosity reduction and drag reduction agent is prepared from, by weight, 20-30% of macromolecule terpolymer, 20-35% of polyolefin drag reduction agent, 20-40% of higher alcohol, 5-10% of compound emulsifier and 1-5% of emulsion stabilizer. The emulsion type crude oil viscosity-reduction drag reduction agent can be rapidly dissolved into crude oil, so that the viscosity of the crude oil is reduced, the friction resistance of the crude oil is reduced, return pressure is reduced, and the pipe transportation capability is improved.

Description

Technical field: [0001] The invention relates to the technical field of crude oil pipeline transportation in oilfields, in particular to an emulsion-type crude oil viscosity-reducing and drag-reducing agent applied to high-wax pure oil pipeline transportation. Background technique: [0002] The crude oil output in the late stage of oilfield development is declining, and the oil output volume has been far less than the originally designed rated oil output volume. During the pipeline transportation in winter, the temperature of crude oil has dropped significantly, resulting in wax analysis, wax deposition, and waxy asphaltene condensate deposition in the pipeline network. , especially the trunk pipeline network before entering the joint export station, the temperature drop along the way is large, the temperature at the end point of the station is close to or lower than the freezing point of crude oil, the waxy asphaltene deposition on the pipe wall is serious, the pipe diameter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D1/17
Inventor 张爱兰吴博武李春杰欧阳武
Owner BC P INC CHINA NAT PETROLEUM CORP
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