Preparation process of acid viscosifier

Abstract

The invention discloses a preparation process of an acid viscosifier. The preparation process comprises the following steps: (a) purifying acrylamide; (b) purifying AMPS (2-acrylamido-2-methyl propane sulfonic acid); (c) weighing MA (maleic anhydride), hydrolyzing, transferring into a three-necked bottle and adding a complexing agent; (d) adding AMPS and AM (acrylamide) solutions and adjusting the pH value to 7 by using a sodium hydroxide solution; (e) introducing inert gas for deoxygenation, and then adding an initiator; and (f) continuously introducing the inert gas, adjusting the temperature to the reaction temperature, performing polymerization reaction for a certain period of time, further adding the remaining AMPS and the AM solutions, and further reacting for a period of time to get a target product. According to the preparation process disclosed by the invention, the polymer acid viscosifier can be successfully prepared, the preparation process further has the advantages of high production efficiency, simple production process, simplicity in operation and capability of greatly reducing production cost, and the quality of the produced polymer acid viscosifier is good.

Description

technical field [0001] The invention relates to a preparation process of an acid liquid thickener. Background technique [0002] Acidizing technology has become an important technical measure and development means for reservoir engineers at home and abroad to relieve the clogging of oil and water wells near the wellbore, expand or extend oil and gas flow channels, improve formation permeability, increase production and injection, especially for some carbonate reservoirs It is more important for the efficient exploitation and development of some sandstone reservoirs. As a slow acid, thickened acid is used more and more, and this development trend will accelerate in the future. Thickening acid is mainly used in acid fracturing treatment. [0003] Because the thickener increases the viscosity of the acid liquid, reduces the squeezeability of the acid, and often prolongs the construction time needlessly, so the thickener is rarely used in the acidification of the matrix. [0...

AI Technical Summary

Problems solved by technology

However, most of the thickeners currently used in various oil fields need more time to be prepared on site, which increases the construction cost. The prepared acid liquid system has low viscosity and poor shear resistance, which cannot meet the needs of the measures well. , which limits the function of the thickener