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Siloxane quaternary ammonium salt modified amphiphilic polymer ultra-heavy oil viscosity reducer and preparation method and application thereof

A technology of amphiphilic polymer and viscosity reducer, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problem of unmentioned application effect of high salinity ultra-heavy oil, and achieve good viscosity reduction. effect, enhance temperature and salt resistance and anti-aging ability, the effect of simple synthesis process

Active Publication Date: 2018-04-06
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The application effect on super heavy oil with high salinity is not mentioned

Method used

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  • Siloxane quaternary ammonium salt modified amphiphilic polymer ultra-heavy oil viscosity reducer and preparation method and application thereof
  • Siloxane quaternary ammonium salt modified amphiphilic polymer ultra-heavy oil viscosity reducer and preparation method and application thereof
  • Siloxane quaternary ammonium salt modified amphiphilic polymer ultra-heavy oil viscosity reducer and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0064] Silicone quaternary ammonium salt monomer containing double bond S 0 Synthesis:

[0065] Add 5.26 g of dimethylaminoethyl methacrylate, 1-(4-bromobutyl)-1,1,3,3,5, 14.35g of 5,5-heptamethyltrisiloxane and 30g of acetone, stir well. After reacting at a temperature of 55° C. for 60 hours, it was cooled to room temperature; most of the solvent and some unreacted raw materials were removed by rotary evaporation under reduced pressure. After cooling the remaining distillate to room temperature, add 50.0 mL of diethyl ether, cool to 0°C to crystallize, then filter with suction, wash with diethyl ether three times, and dry in vacuum at 45°C for 24 hours to obtain a siloxane-based quaternary ammonium salt monomer containing a double bond S 0 , yield 12.25g, yield rate is 71.18%;

[0066] S 0 The synthetic reaction formula is as follows:

[0067]

[0068] figure 1 The siloxane-based quaternary ammonium salt monomer S containing double bonds prepared in this embodiment ...

Embodiment 2

[0074] Silicone quaternary ammonium salt monomer containing double bond S N Synthesis:

[0075] The preparation steps are as described in Example 1, except that: 5.22 g of (N,N-dimethylaminoethyl) methacrylamide is weighed instead of dimethylaminoethyl methacrylate; other conditions are completely the same as in Example 1. Preparation of siloxane-based quaternary ammonium salt monomer S containing double bonds N 12.85g, the yield is 74.84%;

[0076] S N The synthetic reaction formula is as follows:

[0077]

Embodiment 3

[0079] Amphiphilic polymer super heavy oil viscosity reducer PADS modified by silicone quaternary ammonium salt 0 Synthesis of -1:

[0080] Weigh successively 17.21g of acrylamide, 9.79g of dimethyl diallyl ammonium chloride, 3.00g of the double bond-containing siloxane quaternary ammonium salt monomer S prepared in Example 1 0 , 250.00g of water, put it into a four-necked flask equipped with a thermometer, an air guide tube, a reflux condenser and a stirring device, blow nitrogen under stirring, heat up to 65°C after 30 minutes, and weigh 0.15g of azobisisobutylamidine salt Acetyl acid (AIBA), after dissolving with 20.00g of water, divided into 2 batches with an interval of 15 minutes; every 15 minutes, dropwise added 10g of initiator aqueous solution to the reaction bottle, after completion, kept the reaction temperature at 65°C, and reacted for 8 hours to obtain the reaction liquid; after the reaction liquid was cooled to room temperature, it was poured into 500mL acetone,...

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Abstract

The invention provides a siloxane quaternary ammonium salt modified amphiphilic polymer ultra-heavy oil viscosity reducer and a preparation method and an application thereof. Firstly, two kinds of double bond-containing siloxane-based quaternary ammonium salt monomers with different structural features are synthesized, and the viscosity reducer is obtained through radical solution polymerization of the double bond-containing siloxane-based quaternary ammonium salt monomers with cationic monomers and acrylamide respectively. The viscosity reducer is used for ultra-heavy oil and has good viscosity reducing effects, temperature resistance and salt resistance, excellent viscosity reducing effects and the like for high-mineralization ultra-heavy oil. The ultra-heavy oil is easy to be demulsified and dehydrated after being subjected to emulsification and viscosity reduction treatment. The synthetic process of the method is simple and easy to control, the obtained viscosity reducer can be used alone and does not need to be compounded and used together with other additives, and the viscosity reducer is excellent in comprehensive performance, green and environmentally friendly.

Description

technical field [0001] The invention relates to an amphiphilic polymer super heavy oil viscosity reducer modified by siloxane quaternary ammonium salt and its preparation method and application, belonging to the technical field of super heavy oil production viscosity reducer. Background technique [0002] Heavy oil can be divided into ordinary heavy oil (viscosity 50-10000mPa·s), extra heavy oil (viscosity 10000-50000mPa·s) and super heavy oil (viscosity>50000mPa·s) according to its viscosity. Ultra-heavy oil and extra-heavy oil are collectively referred to as super-extra-heavy oil. Super-extra-heavy oil has high colloidal asphaltene content, high viscosity, and poor fluidity. To realize the normal production and transportation of ultra-extra-heavy oil, its viscosity must be reduced and its its mobility. At present, the water-soluble emulsified heavy oil viscosity reduction recovery technology is the most widely used and most economical and effective method at home and a...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F226/02C08F230/08C09K8/588C09K8/88
CPCC08F220/56C09K8/588C09K8/882C08F226/02C08F230/08
Inventor 王明刚韩兴君杨振敏谭业邦
Owner SHANDONG UNIV
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