Compound ion polymer and preparation method thereof

Abstract

The invention discloses a compound ion polymer and a preparation method thereof. The polymer is prepared from the following components in parts by weight: 80-120 parts of acrylamide, 5-10 parts of anionic monomer, 5-10 parts of cationic monomer, 2-8 parts of third monomer, 3 parts of NVP, and 200-400 parts of deionized water. The compound ion polymer disclosed by the invention improves the hydrophilicity and antimicrobial property of the polymer on the one hand, on the other hand, the contents of the positive and negative charges in the prepared hydrophobically associating amphoteric polymer are equal, and the solution forms an antipolyelectrolyte effect.

Description

technical field [0001] The invention belongs to the technical field of chemistry, and relates to a composite ion polymer and a preparation method thereof. Background technique [0002] Petroleum still plays a key role in the economic development of today's society. However, at present, the oil industry is facing two major problems: (1) new oil fields are becoming less and less; (2) there is still a large amount of crude oil in depleted oil reservoirs, and conventional oil recovery techniques can only recover about 30% of the remaining crude oil at the bottom. At present, the most commonly used polymer oil displacement agents in oil fields are biopolymer oil displacement agent xanthan gum and synthetic polymer partially hydrolyzed polyacrylamide. They have achieved good results in most blocks of the oil field. There are insurmountable problems in high-temperature and high-salt reservoirs. Although xanthan gum has good salt resistance, its thermal stability and biological st...

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Problems solved by technology

However, at present, the oil industry is facing two major problems: (1) new oil fields are less and less; (2) there is still a large amount of crude oil in depleted oil reservoirs, and conventional oil recovery technology can only recover about 30% of the remaining crude oil at the bottom

At present, the most commonly used polymer oil displacement agents in oil fields are biopolymer oil displacement agent xanthan gum and synthetic polymer partially hydrolyzed polyacrylamide. They have achieved good results in most blocks of the oil field. There are insurmountable problems in high temperature and high salinity reservoirs

Although xanthan gum has good salt resistance, its thermal stability and biological stability are poor, it is easy to degrade and block the oil layer, and the cost is high; partially hydrolyzed polyacrylamide relies on high molecular weight and the static electricity of carboxyl groups on the molecular chain The repulsion effect makes the molecular chain stretch, so as to achieve the effect of thickening. However, under the conditions of high temperature, high salt and high shear, polyacrylamide is easy to hydrolyze, degrade, and chain curl, etc., which cannot meet the requirements of engineering construction. Therefore, it is urgently needed Develop temperature-resistant, salt-resistant, shear-resistant polymers to meet requirements

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