Effect of Salinity (KCl) on Rheological Properties and Rate of Penetration of Treated Bentonite and Ca2+ Based Polymer Drilling Mud

Jabel A. Kwaw and Eric Broni-Bediako
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Jabel A. Kwaw: Total Petroleum Ghana PLC, Ghana
Eric Broni-Bediako: Department of Petroleum and Natural Gas Engineering, School of Petroleum Studies, University of Mines and Technology, Ghana

International Journal of Research and Scientific Innovation, 2022, vol. 9, issue 10, 15-21

Abstract: The objective of this study was to evaluate the effect of salinity (KCl) on rheological properties and rate of penetration of treated bentonite mud and Ca2+ based polymer mud. A laboratory prepared treated bentonite and Ca2+ based polymer mud acquired from the field were used. The salinity of the mud was increased from 0 – 15% by adding KCl, and the fluid loss properties were tested both at LP/LT for both mud and at HP/HT dynamic conditions for the Ca2+ based polymer mud. It was observed that there was a general increase in the mud weight and gel-strength when concentration of KCl was increased. Plastic viscosity, yield point and apparent viscosity of Ca2+ polymer mud reduced as the salinity was increased. For the treated bentonite mud there was a reduction of plastic viscosity, yield point and apparent viscosity from 0 -2% and an increase from 5% – 10%. Also, the fluid loss to the formation increased and the quality of the filter cake formed reduced as the salinity was increased for all conditions tested. Results showed an increase in ROP as the plastic viscosity reduces and vice versa.

Date: 2022
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