Effect of Ethylenediamine on Properties of Clay Stabilizers Prepared from Epichlorohydrin and Dimethylamine
In order to restrain and reduce the harm of hydration expansion and dispersion transfer of clay minerals to oil and gas reservoirs,clay stabilizers need to be added in the process of oilfield water injection development,so the development of clay stabilizers is one of the important research fields of oilfield chemicals.Using epichlorohydrin and dimethylamine as raw materials,the anti-swelling rate as an index,influence of ethylenediamine on the anti-swelling performance of organoamine clay stabilizer synthesized from the two raw materials was studied by single factor experiment,and the synthesis conditions were optimized by orthogonal experiment.The results showed that when n(C3H5ClO)∶n(C2H7N9)was 1.2∶1,the reaction temperature was 60℃,the reaction time was 2 h,and the mass fraction of C2H8N2 was 2%,the anti-swelling rate of the synthesized organoamine clay stabilizer was the highest,being 86%.Compared with the clay stabilizer COP-2 used in oil field,it had good anti-swelling effect.
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