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Tackifier copolymerization association compound, and preparation method thereof

The technology of an associate and a tackifier is applied in the field of polymer for drilling fluid and its preparation, which can solve the problem of no obvious improvement in salt resistance and calcium resistance, and achieve the effect of high temperature 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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  • Tackifier copolymerization association compound, and preparation method thereof
  • Tackifier copolymerization association compound, and preparation method thereof
  • Tackifier copolymerization association compound, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0062] Weigh 418g NaCl and dissolve it in 1570g deionized water; then weigh 24g MAPS and 90g DMAM respectively and dissolve it in NaCl solution; 2 Deoxygenation was performed for 1 hour, while the temperature was raised to 55° C., kept for 30 minutes, then 0.44 g of ammonium persulfate was added, and an intermediate product was obtained after 2 hours of reaction. Then, 20 g of cationic polyamine 1 was dissolved in 100 g of deionized water to prepare a cationic polyamine solution, and then the cationic polyamine solution was added to the intermediate product, mixed evenly, and the temperature was raised to 65°C at the same time, and the reaction was continued for 4 hours. A precipitate was obtained by precipitation with acetone. After drying at 110°C for 24 hours, it was pulverized to obtain MAPS / DMAM tackifier.

Embodiment 2

[0064] Weigh 104g CaCl 2 Dissolve in 836g deionized water; then weigh 47g MAPS, 80g DMAM and dissolve in CaCl 2 in the solution; fully dissolved and then transferred to the reactor, and N 2 Deoxygenation was performed for 1 hour, while the temperature was raised to 50° C., kept for 30 minutes, then 0.42 g of sodium persulfate was added, and the reaction was carried out for 1 hour to obtain an intermediate product. Then, 20 g of cationic polyamine 2 was dissolved in 100 g of deionized water to prepare a cationic polyamine solution, and then the cationic polyamine solution was added to the intermediate product, mixed evenly, and the temperature was raised to 70° C., and the reaction was continued for 3 hours. A precipitate was obtained by precipitation with acetone. After drying at 120°C for 24 hours, it was pulverized to obtain MAPS / DMAM tackifier.

Embodiment 3

[0066] Weigh 36g AlCl 3 Dissolve in 580g deionized water; weigh 70g MAPS and 70g DMAM respectively in AlCl 3 in the solution; fully dissolved and then transferred to the reactor, and N 2 Oxygen removal for 0.5 h, while raising the temperature to 45°C, keeping for 30 min, adding 0.48 g of potassium persulfate, and reacting for 1.5 h to obtain an intermediate product. Then 20 g of cationic polyamine 3 was dissolved in 100 g of deionized water to prepare a cationic polyamine solution, and then the cationic polyamine solution was added to the intermediate product, mixed evenly, and the temperature was raised to 55° C. at the same time, and the reaction was continued for 4 hours. A precipitate was obtained by precipitation with acetone. After drying at 120°C for 16 hours, it was pulverized to obtain MAPS / DMAM tackifier.

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Abstract

The invention discloses a tackifier copolymerization association compound, and a preparation method thereof. 100wt% of the tackifier copolymerization association compound comprises 10 to 75wt%, preferably 30 to 65wt% of a structure unit A, 8 to 55wt%, preferably 20 to 60wt% of a structure unit B, and a structure unit C; the structure unit A is N,N-dimethylacrylamide; the structure unit B is amphoteric monomer N-methyl diallyl propanesulfonate (MAPS), the structure unit C is an ionic association compound of the structure unit B with cationic polyamine; and the amount of cationic polyamine accounts for 1 to 50wt%, preferably 3 to 40wt% of the total amount of the tackifier copolymerization association compound. The tackifier prepared via a preparation method in the invention is capable of tolerating a temperature as high as 200 DEG C, tolerating NaCl concentration as high as the saturation concentration, and tolerating CaCl2 concentration as high as 20%, and also possesses excellent shale inhibition and filtration reducing properties.

Description

technical field [0001] The invention relates to a polymer used in drilling fluid in the oil drilling process and a preparation method thereof, 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 flui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/54C08F226/02C09K8/035
CPCC08F283/00C09K8/035C08F220/54C08F226/02
Inventor 田丹杨超
Owner CHINA PETROLEUM & CHEM CORP
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