Studies Quantify Cement Sealing Performance Under Downhole Conditions
The authors discuss a modified ultrasonic-cement-analyzer (UCA) vessel that allows assessment of slurry sealing performance under representative downhole conditions while running otherwise standard UCA equipment.
Reliable evaluation of cement-plug sealing performance requires testing under elevated temperature and pressure conditions representative of downhole conditions. In the complete paper, two laboratory setups designed for this purpose are described. In both setups, plugs are cured and tested under downhole conditions inside sections of steel pipe. Using this equipment, a strong positive correlation was found between the amount of interfacial stress buildup and the sealing performance of the set cement plug against gas flow.
We're sorry, but this content is reserved for SPE Members. If you are a member, please sign in at the top of the page for access. If you are not a member and you find JPT content valuable, we encourage you to become a part of the SPE member community.