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A kind of preparation method of water-soluble anionic polymer type heavy oil viscosity reducer

A technology of anionic polymer and viscosity reducer for heavy oil, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of large amount of viscosity reducer for heavy oil, difficult demulsification, and poor salt resistance. , to achieve the effect of low production cost, simple preparation method and good viscosity reduction effect

Active Publication Date: 2019-10-25
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, especially the existing heavy oil viscosity reducer with large dosage, poor salt resistance, difficulty in demulsification after emulsification and viscosity reduction, the present invention provides a water-soluble anionic polymer type heavy oil reducer. Adhesive and its preparation method and application

Method used

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  • A kind of preparation method of water-soluble anionic polymer type heavy oil viscosity reducer
  • A kind of preparation method of water-soluble anionic polymer type heavy oil viscosity reducer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The preparation and application of the water-soluble anionic polymer type heavy oil viscosity reducer include the following steps:

[0052] (1) Dissolve 2.756g of acrylamide, 2.161g of acryloyl morpholine, and 0.257g of N,N-dimethylacrylamide in 50g of water, and stir evenly; in this system, acrylamide, acryloyl morpholine, N,N- The molar ratio of dimethylacrylamide is 75:20:5, and the total mass fraction of acrylamide, acryloylmorpholine, and N,N-dimethylacrylamide is 10%;

[0053] (2) After the above system is deoxygenated and nitrogen passed, add 0.025g of initiator azobisisobutylamidine hydrochloride, and conduct free radical polymerization at 55°C for 10 hours to obtain component A; azobisisobutylamidine salt The mass fraction of acid salt is 0.5%;

[0054] (3) acrylamide 2.228g, sodium styrene sulfonate 2.777g, chain transfer agent mercaptoethylamine 0.050g are dissolved in 50g water to obtain a uniform solution; in this solution, the molar ratio of acrylamide an...

Embodiment 2

[0063] The preparation and application of the water-soluble anionic polymer type heavy oil viscosity reducer include the following steps:

[0064] (1) Dissolve 2.896g of acrylamide, 1.566g of acryloyl morpholine, and 0.538g of N,N-dimethylacrylamide in 50g of water, and stir evenly; in this system, acrylamide, acryloyl morpholine, N,N- The molar ratio of dimethylacrylamide is 75:15:10, and the total mass fraction of acrylamide, acryloylmorpholine, and N,N-dimethylacrylamide is 10%;

[0065] (2) After the above system is purged with nitrogen and deoxygenated, add 0.025g of initiator azobisisobutylamidine hydrochloride, and conduct free radical polymerization at 55°C for 10 hours to obtain component A; azobisisobutylamidine salt The mass fraction of acid salt is 0.5%;

[0066] (3) acrylamide 2.230g, sodium styrene sulfonate 2.775g, chain transfer agent mercaptoethylamine 0.050g are dissolved in 50g water to obtain a uniform solution; in this solution, the molar ratio of acrylam...

Embodiment 3

[0075] The preparation and application of the water-soluble anionic polymer type heavy oil viscosity reducer include the following steps:

[0076] (1) Dissolve 3.050 g of acrylamide, 1.100 g of acryloyl morpholine, and 0.851 g of N,N-dimethylacrylamide in 50 g of water, and stir evenly; in this system, acrylamide, acryloyl morpholine, N,N- The molar ratio of dimethylacrylamide is 75:10:15, and the total mass fraction of acrylamide, acryloylmorpholine, and N,N-dimethylacrylamide is 10%;

[0077] (2) After the above system is purged with nitrogen and deoxygenated, add 0.025g of initiator azobisisobutylamidine hydrochloride, and conduct free radical polymerization at 55°C for 10 hours to obtain component A; azobisisobutylamidine salt The mass fraction of acid salt is 0.5%;

[0078] (3) acrylamide 2.222g, sodium styrene sulfonate 2.771g, chain transfer agent mercaptoethylamine 0.050g are dissolved in 50g water to obtain a uniform solution; in this solution, the molar ratio of acr...

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Abstract

The invention relates to a preparation method of a water-soluble anion polymer-type thickened oil viscosity reducer. The thickened oil viscosity reducer comprises a component A and a component B; thecomponent A is an acrylamide copolymer containing acryloyl morpholine blocks; the component B is an acrylamide copolymer containing active end groups. A thickened oil viscosity reducer solution is mixed with thickened oil; it is proved through viscosity reduction tests that when the dosage reaches 0.2 mg / mL, the viscosity reducer can achieve high-temperature stirred emulsification and viscosity reduction in pure water and salt water, the viscosity reduction rate is greater than 93%, and stirred demulsification is stopped at room temperature. The thickened oil emulsification viscosity reducer is obvious in viscosity reduction effect and high in environmental adaptability, the emulsification and viscosity reduction behaviors of the thickened oil viscosity reducer have temperature and shearing responsiveness, and convenience is provided for application and post-treatment in oil fields.

Description

technical field [0001] The invention relates to a compound water-soluble amphiphilic polymer thick oil emulsifying viscosity reducer and its preparation method and application, and belongs to the technical field of heavy oil emulsifying viscosity reducer and its preparation. Background technique [0002] Heavy oil has high viscosity and is difficult to flow, which makes its exploitation, transportation and use difficult, and resource utilization costs are high. However, the current status of crude oil resources determines that the center of gravity of crude oil resources will be transferred to heavy oil resources, so heavy oil viscosity reduction has attracted much attention. For example: Chinese patent document CN 102876309A (application number: 201110196724.4) discloses a thick oil viscosity reducer, including hydrocarbon oil, β-cyclodextrin, fatty alcohol polyoxyethylene ether and hydrophilic components, with hydrophilic The mass of components is 1, the mass of hydrocarbo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/58C08F220/54C08F212/14C09K8/588
CPCC08F212/14C08F220/56C09K8/588C08F220/58C08F220/54
Inventor 刘义刚李娟邹剑谭业邦王秋霞孟祥海张伟刘昊刘长龙王弘宇
Owner CHINA NAT OFFSHORE OIL CORP
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