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Preparation method of thickening agent copolymerization association compound

The technology of an associate and a tackifier is applied in the field of preparation of polymers for drilling fluids, which can solve the problem of no obvious improvement in salt resistance and calcium resistance, and achieve the effects of high shear force, temperature resistance and salt resistance.

Active Publication Date: 2017-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN101955564A, CN103113518A, and CN102127401A disclose high-temperature-resistant tackifiers. The high-temperature-resistant performance of the tackifier has been significantly improved, and the temperature resistance can reach above 200°C; the salt-resistant and calcium-resistant properties are not mentioned, but from the monomers used and the preparation method It is speculated that there is no significant improvement in salt and calcium resistance

Method used

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  • Preparation method of thickening agent copolymerization association compound
  • Preparation method of thickening agent copolymerization association compound
  • Preparation method of thickening agent copolymerization association compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Add 2.5g of OP15 and 22.5g of Span 80 into 150g of white oil, pass N under stirring condition 2 Deoxygenate for half an hour, prepare the oil phase for later use; add 37.5g NaCl to 140g water and fully dissolve it to prepare an NaCl aqueous solution, then add 18g MAPS and 45gAM to the NaCl aqueous solution, stir to fully dissolve it; transfer the oil phase to the reactor Add the water phase dropwise to the oil phase while stirring, and stir for half an hour to obtain an emulsification system; add 0.24g potassium persulfate to the emulsification system, and pass N 2 Deoxygenation for half an hour, while raising the temperature to 60 ° C, and reacting for 1 hour to obtain an intermediate product; then dissolving 2 g of cationic polyamine 1 in 10 g of deionized water to prepare a cationic polyamine solution, and then adding the cationic polyamine solution to the intermediate product, Mix evenly, and at the same time raise the temperature to 70°C, and continue the reaction ...

Embodiment 2

[0066] Add 1.5g of OP15 and 13.5g of Span 80 into 75g of white oil, pass N under stirring condition 2 Deoxygenation for half an hour, the oil phase was prepared for use; 20gCaCl 2 Add to 140g water and fully dissolve to make CaCl 2 aqueous solution, then add 47gMAPS and 33gAM to CaCl 2 In the aqueous solution, stir to fully dissolve it; transfer the oil phase to the reactor, add the water phase to the oil phase dropwise while stirring, and stir for half an hour to obtain an emulsification system; add 0.32g of sodium persulfate to the emulsification system, wait After fully dissolved, pass N 2 Deoxygenation for half an hour, while raising the temperature to 55 ° C for 1.5 hours to obtain an intermediate product; then dissolving 4 g of cationic polyamine 2 in 10 g of deionized water to prepare a cationic polyamine solution, and then adding the cationic polyamine solution to the intermediate product, Mix evenly, and at the same time raise the temperature to 65°C, and continue ...

Embodiment 3

[0068] Add 1.4g of Tween 80 and 13.6g of Span 80 into 90g of white oil, pass N under stirring condition 2 Deoxygenation for half an hour, the oil phase was prepared for use; 10gAlCl 3 Add to 130g water and fully dissolve to make AlCl 3 aqueous solution, then add 28gMAPS and 20gAM to AlCl 3 In the aqueous solution, stir to fully dissolve it; transfer the oil phase to the reactor, add the water phase to the oil phase dropwise while stirring, and stir for half an hour to obtain an emulsification system; add 0.2g potassium persulfate to the emulsification system, wait After fully dissolved, pass N 2 Deoxygenation for half an hour, while raising the temperature to 50 ° C, and reacting for 2 hours to obtain an intermediate product; then dissolving 6 g of cationic polyamine 3 in 20 g of deionized water to prepare a cationic polyamine solution, and then adding the cationic polyamine solution to the intermediate product, Mix evenly, and at the same time raise the temperature to 60°C...

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Abstract

The invention discloses a preparation method of a thickening agent copolymerization association compound. The copolymerization association compound contains a structural unit A, a structural unit B and a structural unit C, the structural unit A is acrylamide, the structural unit B is amphoteric monomer N-methyldiallyl propanesulfonate (MAPS), and the structural unit C is an ion association body of the structural unit B and cationic polyamine; and based on the total amount of the copolymerization association compound, the content of the structural unit A is 10-75wt%, the total content of the amphoteric monomer is 8-55wt%, and the content of the cationic polyamine is 1-50wt%. Temperature resistance of the thickening agent prepared by the method can reach 200 DEG C, anti-NaCl concentration is saturated, and the anti-CaCl2 concentration reaches 20%; and meanwhile, excellent shale inhibition performance and filtrate loss controllability are furthermore achieved.

Description

technical field [0001] The invention relates to a preparation method of a polymer used in drilling fluid during petroleum drilling, in particular to a high-temperature-resistant viscosifier used in drilling fluid and a preparation method thereof. Background technique [0002] During the drilling process, in order to ensure that the drilling fluid has a high viscosity and good rheology under low solid phase, it is usually necessary to add a viscosifier to increase the viscosity of the drilling fluid. Drilling fluid viscosifiers are all water-soluble high molecular polymers with long molecular chains. In addition to the viscosifying effect, viscosifiers often also serve as shale inhibitors (coating agents), fluid loss reducers and flow control agents. type improver, etc. Therefore, the use of viscosifiers is often beneficial to improving the rheological properties of drilling fluids, and is also beneficial to the stability of wellbore walls. [0003] Drilling fluid viscosifi...

Claims

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Application Information

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IPC IPC(8): C08G81/02C08F220/56C08F226/02C09K8/035
Inventor 杨超张志智孙潇磊鲁娇尹泽群刘全杰
Owner CHINA PETROLEUM & CHEM CORP
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