Self-diverting agent for heterogeneous carbonate rock acidizing system
A carbonate rock and self-steering agent technology, which is applied in the preparation of organic compounds, organic chemistry, and drilling compositions, can solve problems such as poor system stability, reduced effective action distance, and increased injection pressure. Mild conditions, simple synthesis process, good high temperature resistance effect
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[0018] The present invention will be further described below in conjunction with specific embodiments:
[0019] 1. Preparation of erucamide tertiary amine:
[0020] Add 0.3 mol of erucic acid to a clean and dry three-necked flask, connect the oil bath device and the reflux device, slowly heat until the erucic acid is completely dissolved, add 0.33 mol of 3-dimethylaminopropylamine and 15 g of water-carrying agent xylene in turn; stir for 30 3~5 minutes after seconds N 2 Then use a constant pressure dropping funnel to add 2g catalyst KOH dropwise, adjust the reaction temperature to 140°C, stir and react for 7 hours, take it out, immediately vacuumize it under reduced pressure, remove impurities, and cool to obtain the erucic acid amido tertiary amine.
[0021] 2. Preparation of erucamide propyl betaine:
[0022] Weigh 0.3 mol of the prepared erucamide tertiary amine; weigh 0.36 mol of sodium chloroacetate and prepare it into a 20% sodium chloroacetate solution. Use sodium bicarbonate t...
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