Characterising Curing Cement Slurries by Electrical Conductivity

摘要

Electrical conductivity is a parameter which can be used for monitoring the entire hardening process of oilwell cement slurries.rnThe theoretical relationship between conductivity, porosity, cement chemistry, and ion content is discussed. The theory isrnconfirmed by experiments; basically, the cement slurry conductivity decrease is a function of porosity decrease. The appliedrnresults show that the electrical conductivity of a curing slurry reflects both the strength development and the ability to resist gasrnmigration.