Synergistic Effect of Temperature and Pressure on Cement Thickening Time

Samuel S. Mofunlewi; Ogbonna Joel; Dulu Appah; Chikwendu Ubani

doi:https://doi.org/10.14445/22315381/IJETT-V67I4P213

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Volume 67 | Issue 4 | Year 2019 | Article Id. IJETT-V67I4P213 | DOI : https://doi.org/10.14445/22315381/IJETT-V67I4P213

Synergistic Effect of Temperature and Pressure on Cement Thickening Time

Samuel S. Mofunlewi, Ogbonna Joel, Dulu Appah, Chikwendu Ubani

Citation :

Samuel S. Mofunlewi, Ogbonna Joel, Dulu Appah, Chikwendu Ubani, "Synergistic Effect of Temperature and Pressure on Cement Thickening Time," International Journal of Engineering Trends and Technology (IJETT), vol. 67, no. 4, pp. 59-63, 2019. Crossref, https://doi.org/10.14445/22315381/IJETT-V67I4P213

Abstract

Thickening time of cement have been carried out on the effect of temperature at a single point of pressure without considering the effect of changes on the pressure profile. Presently, no comprehensive study has been done to demonstrate the combined effect of temperature and pressure on cement slurries. Thickening time tests are conducted in the cementing laboratory using the bottom hole circulating temperature (BHCT) and the cumulative hydrostatic pressure of the fluid in the well at the well depth. However, since temperature and pressure increase with increasing depth of the well, it is important to understand the combined effect of these varying parameters on the thickening time of cement slurries in the annular space between the casing and the formation. Thickening time tests were conducted in line with API specifications at 80oF and 120oF and varying bottom hole pressures (between 0psi and 20,000psi) using neat cement slurry. A model was developed using the multiple regression method. The model was developed to show the relationship between the thickening time and temperature and pressure. The model can also be used to predict the thickening time of cement slurries with changes in temperature and pressure. Results also show that thickening time of cement slurry reduces as temperature and pressure increases for a particular type of cement slurry. Test results indicate that changes in temperature and pressure significantly affect the thickening time.

Keywords

Temperature, pressure, thickening time, cement

References

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