Heavy oil viscosity reducer

A viscosity reducer and initiator technology, applied in the field of viscosity reducer and its preparation, can solve the problems of poor temperature resistance, achieve good temperature resistance, improve salt and temperature resistance, and good viscosity reduction efficiency

Inactive Publication Date: 2019-05-03
刘忠
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Li Jianbo et al. (Synthesis and mechanism analysis of heavy oil viscosity reducer[J]. Journal of Southwest Petroleum University (Natural Science Edition), 2001,23(1):40-42) and Zhou Fengshan et al. (A heavy oil viscosity reducer Development and application of agent[J]. Xi’an Shiyou University Journal (Natural Science Edition), 2000,15(2):52-54) reported the use of lipids, styrene, maleic anhydride copolymerization to form a terpolymer, for The amount of monomer added, temperature, etc. have been studied to some extent, but the temperature resistance of the above-mentioned heavy oil viscosity reducer is relatively poor

Method used

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preparation example Construction

[0027] The present invention also provides a preparation method of the viscosity reducer, comprising the following steps:

[0028] Mix monomer Ⅰ, monomer Ⅱ, acrylamide, acrylic acid and initiator, and polymerize to obtain a viscosity reducer;

[0029] The monomer I is:

[0030]

[0031] The monomer II is: CH 2 =CH-CONHR, R is a C1-C20 alkyl group.

[0032] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0033] In the present invention, the initiator is preferably one or more of azobisisobutyronitrile, azobisisovaleronitrile and azobisisoheptanonitrile; When there are more than two kinds, the present invention does not have any special limitation on the ratio of the specific substances, and they can be mixed in any proportion.

[0034] In the present invention, the molar ratio of the initiator to acrylamide is preferably 1:(8000-12000), more preferably 1:(9000-...

Embodiment 1

[0053] According to the ratios of m, n, x, and y shown in Table 1, monomer I, monomer II (R is a C15 alkyl group), acrylamide, acrylic acid, and azobis in a molar ratio of 1:10000 to acrylamide Isobutyronitrile was mixed and reacted for 6 hours under stirring at 40°C and normal pressure; the resulting system was precipitated with methanol, purified, and dried in vacuum to obtain a viscosity reducer.

Embodiment 2

[0055] At 40°C, the viscosity reducer prepared in Example 1 was mixed with conventional heavy oil from Bohai Oilfield to test the viscosity of the heavy oil. The test results are shown in Table 1:

[0056] The viscosity reducing agent of table 1 embodiment 1 is to the viscosity reducing experiment result of heavy oil

[0057]

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Abstract

The invention relates to the technical field of heavy oil viscosity reduction and especially relates to a viscosity reducer having the structure as the formula I, and a preparation method and an application of same. The maximum viscosity reduction rates of the viscosity reducer are 91.27%, 95.62% and 96.73% respectively at 40 DEG C, 60 DEG C and 80 DEG C. The viscosity reducer has excellent temperature tolerance and great viscosity reduction efficiency.

Description

technical field [0001] The invention relates to the technical field of heavy oil viscosity reduction, in particular to a viscosity reduction agent and its preparation method and application. Background technique [0002] With the reduction of recoverable reserves of light oil and the improvement of oil extraction technology, the proportion of heavy oil continues to increase. Heavy oil is a complex mixture rich in asphaltenes and colloids, which mainly has the disadvantages of high viscosity, poor oil-water density, and poor fluidity. At the same time, the colloid and asphalt in heavy oil have surface activity, and when mixed with formation water, the viscosity of heavy oil is likely to be further increased due to emulsification. Therefore, viscosity reduction of heavy oil is an indispensable link in oilfield production. [0003] Chemical viscosity reduction technology is currently one of the largest and most economical measures to reduce viscosity of heavy oil, and has bee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/34C08F220/54C08F220/56C08F220/06C09K8/588C09K8/88
Inventor 刘忠
Owner 刘忠
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