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Organic silicone modified amphiphilic polymer type heavy oil viscosity reducer easy to demulsify and dewater and preparation method thereof

A thick oil viscosity reducer and amphiphilic polymer technology, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of demulsification and dehydration of produced fluid, complicated process steps, high price, etc. Strong wet performance, simple process and low cost

Active Publication Date: 2017-05-10
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventive method uses polymethylhydrogensiloxane, hexamethyldisiloxane, octamethylcyclotetrasiloxane, etc. as main raw materials, and undergoes three steps of equilibrium copolymerization, chloroplatinic acid catalyzed hydrosilylation, and anionization. The reaction is completed, the process steps are complicated, and the cost is high
[0006] At present, polymer heavy oil viscosity reducers mostly need to be compounded with other additives in actual use. The price of organopolysiloxane heavy oil viscosity reducers is relatively high. The emulsification system of both is relatively stable, which is not conducive to Issues such as demulsification and dehydration of produced fluid

Method used

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  • Organic silicone modified amphiphilic polymer type heavy oil viscosity reducer easy to demulsify and dewater and preparation method thereof
  • Organic silicone modified amphiphilic polymer type heavy oil viscosity reducer easy to demulsify and dewater and preparation method thereof
  • Organic silicone modified amphiphilic polymer type heavy oil viscosity reducer easy to demulsify and dewater and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) Synthesis of organosilicon quaternary ammonium salt monomer SQ1

[0057] Add 4.26g of (N,N-dimethylaminopropyl)methacrylamide, 18.62g of 3-chloropropyltris(trimethylsiloxy)silane and 34.32g of isopropanol into a three-necked flask, and stir evenly. After reacting for 60 hours at a temperature of 82° C., it was cooled to room temperature; most of the solvent and some unreacted raw materials were removed by rotary evaporation under reduced pressure. The remaining distillate was washed with ether for 3 to 5 times to obtain 10.17 g of organosilicon quaternary ammonium salt monomer SQ1 with a yield of 75%;

[0058] The synthetic reaction formula is as follows:

[0059]

[0060] (2) Synthesis of heavy oil viscosity reducer PASQ1-1

[0061] Weigh 42.6g of acrylamide (AM), 2.13g of organosilicon quaternary ammonium salt monomer SQ1, 298.2g of N,N-dimethylformamide (DMF) 2 In the four-neck flask with air duct, reflux condenser and stirring device, N was passed under st...

Embodiment 2～5

[0070]The synthetic method of thick oil viscosity reducer PASQ1-2, PASQ1-3, PASQ1-4 and PASQ1-5 is as described in Example 1, and difference is: the mass ratio of SQ1 and AM is different (as shown in table 1 below), Other conditions are the same.

[0071] Table 1: Experimental results of heavy oil viscosity reducer PASQ1 in Examples 1-5

[0072] Viscosity reducer SQ1 / AM(%) Yield(%) Molecular weight (×10 6 )

Embodiment 6

[0074] (1) Synthesis of organosilicon quaternary ammonium salt monomer SQ2

[0075] Add 3.93 g of dimethylaminoethyl methacrylate, 12.04 g of 3-chloropropyl (triethoxy) silane and 23.96 g of ethanol into a three-necked flask, and stir evenly. After reacting for 72 hours at a temperature of 78°C, it was cooled to room temperature, and most of the solvent and some unreacted raw materials were removed by rotary evaporation under reduced pressure. The remaining distillate was washed with petroleum ether for 3 to 5 times to obtain 6.96 g of organosilicon quaternary ammonium salt monomer SQ2 with a yield of 70%;

[0076] The synthetic reaction formula is as follows:

[0077]

[0078] (2) Synthesis of heavy oil viscosity reducer PASQ2

[0079] Weigh 42.6g of acrylamide, 4.26g of organosilicon quaternary ammonium salt monomer SQ2, 312.4g of tetrahydrofuran, add 2 In the four-neck flask with air duct, reflux condenser and stirring device, N was passed under stirring. 2 After 30...

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Abstract

The invention relates to an organic silicone modified amphiphilic polymer type heavy oil viscosity reducer easy to demulsify and dewater and a preparation method thereof. The preparation method for the viscosity reducer comprises the following steps: uniformly mixing and stirring acrylamide, organic silicone quaternary ammonium salt containing double bond and solvent, thereby acquiring a mixed solution; introducing nitrogen, heating to 60-80 DEG C, adding an initiator while stirring, and then reacting for 5-12 hours at 60-80 DEG C, thereby acquiring a reaction solution; cooling the reaction solution and then putting into acetone or ethyl alcohol, performing suction filtration, soaking, washing and drying, thereby acquiring the heavy oil viscosity reducer. The preparation method provided by the invention is simple in operation and low in cost; the prepared viscosity reducer has better heat resistance, salt tolerance and viscosity reducing effects in lower concentration and is easy to demulsify and dewater; the later water treatment difficulty can be reduced; the viscosity reducer need not be compounded with the other auxiliaries, has excellent overall performance and is green and environment-friendly.

Description

technical field [0001] The invention relates to an organosilicon-modified amphiphilic polymer-type heavy oil viscosity reducer which is easy to demulsify and dehydrate and a preparation method thereof, belonging to the technical field of viscosity reducers for heavy oil exploitation. Background technique [0002] With the continuous deepening of oil exploitation, the proportion of heavy oil resources is increasing. However, heavy oil is difficult to exploit, transport and store because of its high density and high viscosity. The current heavy oil viscosity reduction technologies include emulsification, physical viscosity reduction and microbial viscosity reduction methods, among which the heavy oil emulsification viscosity reduction recovery technology is the most widely used and the most economical and effective method. Viscosity reducers for heavy oil usually adopt the method of compounding surfactants. The surfactants used are generally nonionic surfactants, anionic surfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F230/08C09K8/584C09K8/588
CPCC08F220/56C08F230/08C09K8/584
Inventor 王明刚张赛平谭业邦
Owner SHANDONG UNIV
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