CPC C09K 8/40 (2013.01) [C09K 8/424 (2013.01); C09K 8/46 (2013.01); E21B 33/16 (2013.01)] | 11 Claims |
1. A method for cementing in a wellbore, comprising:
making a cement spacer fluid by:
reacting a polyethyleneimine (PEI) with hydrochloric acid to form a polyethyleneimine hydrochloride (PEI HCl) salt;
dissolving the PEI HCl salt in water to form a PEI HCl salt solution; and
forming the cement spacer fluid from the PEI HCl salt solution;
making a cement slurry;
injecting the cement spacer fluid in a wellbore;
injecting the cement slurry in the wellbore; and
allowing the cement slurry to set.
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