Paper Contents
Abstract
Optimization of drilling fluid is very important to eliminate well bore instability particularly in undesirable geological environments. The aim of this work was to examine how selected polymer concentrations affect fracture gradient and the stability of wellbores at different temperatures. Local Cassava Starches were mixed with ImportedLocal Bentonite clays and polymers to form drilling muds. Viscosity, YP, and PV were determined at an API level at the polymer concentrations of 0.5%, 1%, and 2% and at temperatures of 80F to 190F. It was evidenced that the concentration of polymer affected the rheological properties, temperature and ultimately the fracture gradient. In fact, both the local and imported material concentrations also went up posing the danger of exceeding the fracture gradient. It can therefore analysed from the results that Local Bentonite has high YP with an increase in temperatures; that means, temperature plays crucial role, which has to considered while preparing the drilling fluids. By offering a road-map for sieving adjusted polymer-bentonite mixtures, the study emphasizes the effectiveness of the methodology under investigation with regards to enhancing fracture gradient. The use of local materials as better options to the imported ones is again an economic and technical bonus. These studies therefore provide a strong underpinning on how drilling fluid formulations should be made in different well bores taking into consideration local availability of materials in order to enhance efficiency of the drilling practices as well as safe operation.
Copyright
Copyright © 2024 Ahiakwo, Ndidi Ilevaodion. This is an open access article distributed under the Creative Commons Attribution License.
