RESEARCH AND APPLICATION OF SPE-1 EXPANDING AGENT IN LONG CEMENTING SECTION

To improve long section cementing quality in Tuha oil field, the SNC light weight additive and SEP-1 expanding agent was developed which were used in the oil well cement with highstrength and low density-Application on site showed that SNC have helped to decreasing lost circulation, keeping borehole stabilization and preserving pay zone, and SEP-1 Can decrease cement dehydration and cement volume loss and increase cement strength by 30~50 percent.