The Effect of High Pressures and High Temperatures on the Properties of Water Based Drilling Fluids

Mahmood Amani, Mohammed Al-Jubouri

Abstract


Tremendous amounts of hydrocarbons are located in deeper formations where higher pressures and temperatures are experienced. Designing a proper drilling fluid that can tolerate such high-pressure, high-temperature (HP/HT) conditions is a challenging task. The work presented in this paper is focused on investigating the rheological behavior of water-based drilling fluids with different properties at extremely high pressure and temperature conditions using a state-of-the-art viscometer capable of measuring drilling fluids properties up to 600 °F and 40,000 psig. The results of this study show that the viscosity, yield point and gel strength decrease exponentially with increasing temperature until the mud samples fail. This behavior is the result of the thermal degradation of the solid, polymers, and other components of the mud samples. Increase in intermolecular distances due to high temperature will lower the resistance of the fluid to flow and, hence, its viscosity, yield point, and gel strength will reduce. Moreover, conducting this study led to the conclusion that viscosity, yield point, and gel strength increase linearly as the pressure increase. Pressure’s effect on these parameters, however, is more apparent at lower temperatures. Ultimately, the study concluded that the mud samples that were used, which are standard industrial types, failed at a temperature of 250 oF and that the combined effect of temperature and pressure on mud’s rheology is complex.

Key words: Drilling fluids; HPHT; Rheology; Water based mud


Keywords


Drilling fluids; HPHT; Rheology; Water based mud

Full Text:

PDF

References


[1] Ibeh, C.S. (2007). Investigation on the Effect of Ultra-High Pressure and Temperature on the Rheological Properties of Oil-Based Drilling Fluids (Master’s thesis). Texas A&M University, College Station, Texas.

[2] Gusler, W., Pless, M., & Maxey, J., et al. (2007). A New Extreme-HP/HT Viscometer for New Drilling-Fluid Challenges. SPE Drilling & Completion, 22(2), 81-89.

[3] Ali, M., & Al-Marhoun, M. (1990). The Effect of High Temperature, High Pressure and Aging on Water-Based Drilling Fluids. SPE 21613.

[4] Alderman, N., Gavignet, A., & Guillot, D. (1988). High-Temperature, High-Pressure Rheology of Water-Based Muds. SPE 18035, SPE 63rd Annual Technical Conference and Exhibition, Houston, Texas.

[5] Lee, J., & Shadravan, A. (2012). Rheological Properties of Invert Emulsion Drilling Fluid Under Extreme HPHT Conditions. Paper IADC/SPE 151413, presented at IADC/SPE Drilling Conference and Exhibition, San Diego, California, 6-8 March 2012.




DOI: http://dx.doi.org/10.3968%2Fj.est.1923847920120401.256

Refbacks

  • There are currently no refbacks.


Reminder

If you have already registered in Journal A and plan to submit article(s) to Journal B, please click the CATEGORIES, or JOURNALS A-Z on the right side of the "HOME".


We only use three mailboxes as follows to deal with issues about paper acceptance, payment and submission of electronic versions of our journals to databases: caooc@hotmail.com; est@cscanada.net; est@cscanada.org

Copyright © 2010 Canadian Research & Development Centre of Sciences and Cultures
Address: 730, 77e AV, Laval, Quebec, H7V 4A8, Canada

Telephone: 1-514-558 6138
Http://www.cscanada.net Http://www.cscanada.org

E-mail: est@cscanada.net est@cscanada.org