Abstract
Polyoxyalkylenes are widely studied as clay swelling inhibitors. Although many additives are available, the operations require more efficient formulations. This work synthesized and characterized two of molecules: poly(ethylene glycol)(PEG) modified with hydrocarbon chains of different lengths; and poly(amidoamine) dendrimers(PAMAM) and PEG-modified PAMAM. The clay swelling inhibition efficiency was evaluated by the Foster swelling test. For the hydrophobized PEG derivatives, there is an optimum hydrocarbon chain size (C6-C10) to achieve the best performance. The best result was obtained for PEG-modified PAMAM(1:1), tested for the first time, being its performance even better than a commercial additive widely used in the petroleum industry.
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