Session: 11-01-01 Well Drilling Technology

Paper Number: 120718

120718 - Investigation of the Responses of Drilling Parameters at Various Bit Rock Interactions and the Inter-Relation to Drilling Performance 

Accurately understanding the recorded signals of the outcome drilling parameters, precisely linking them to the applied parameters under the determined surface and downhole conditions, correctly interpreting them for better visualization of the downhole drilling conditions to optimize the applied drilling parameters assist in achieving best drilling performance, minimizing the costs, and significantly reducing the Non-Productive Time (NPT).  The aim of this research is to analyze the responses of the drilling parameters’ signals under various scenarios of Bit Rock Interactions (BRI) through applying an innovative laboratory technique. The aim also includes correlations of the input and the output parameters’ data to better understand the parameters’ interrelationships under various status of bit rock interactions generated by a continuance drilling through pre-cored multi-diameter holes. Comprehensive laboratory drilling tests have been conducted using a Large-scale laboratory Drilling Simulator (LDS) in the drilling Technology Laboratory (DTL) at Memorial University of Newfoundland (MUN). Two rock types were used for the drilling experiments, which include granite and sandstone with high and medium strength, respectively. The whole process involved two stages. Stage one involves pre-coring process using different diameters of impregnated coring bits. The purpose of stage one was for preparing a multi-diameter hole to be tested through drilling using a 5-cutter Polycrystalline Diamond Compact (PDC) bit during stage two, where the continuance drilling occurs under constant applied parameter of Wight On Bit (WOB) and Revolution Per Minute (RPM). Core bits were perfectly aligned by utilizing downhole bushings with bearings for centralization and friction elimination.  The applied parameters that were kept constant included WOB, RPM, formation type, and water Flow Rate (FR). The process of data analysis was conducted on the outcome drilling parameters that include the torque and signal amplitude of WOB with respect to a corresponding bit rock interaction and specific area of contact. Results showed very useful information between the responsive torque and the applied WOB signal amplitude at a constant applied WOB and other input drilling parameters. This research found novel results that show the decrease in the responsive torque when the area of contact and the bit-rock interaction increase at a constant WOB. Typically, the torque increases when the area of contact increases as a sign of more bit rock interaction involved. Research methodology, experimental procedure, data analysis and results are reported.

Presenting Author: Abdelsalam Abugharara Memorial University of Newfoundland

Presenting Author Biography: Dr. Abdelsalam Abugharar got his Masters and Doctoral Degrees in Oil and Gas Engineering from Memorial University of Newfoundland, Canada in 2008 and 2019, respectively and got his bachelor degree in petroleum engineering from the Bright Start University of Technology, Libya in 2000. After he obtained his Ph. D., Dr. Abugharar worked in the Drilling Technology Laboratory at Memorial University of Newfoundland as a postdoctoral fellow for 3.5 years, then he worked as a project and research engineer till present. As a work background, Dr. Abugharar worked as a Petroleum Production Engineer at the Arabian Gulf Oil Company, Libya from 2001 and 2010, worked as a assistant lectured in Sebha University in Libya from 2010 to 2013, and was appointed as a per-course instructor for 4 semesters at Memorial University of newfoundland between 2016 and 2018 where he taught undergraduate and graduate level courses in the process engineering department at MUN.
His area of research is linked to but not limited to:
Petroleum Engineering
Drilling Engineering
Production Engineering
Rock mechanics
Rock characterization
Dr. Abugharar has more than 35 publications and more than 100 citations for his conference and journal publications.

Authors:

Abdelsalam Abugharara Memorial University of Newfoundland
Abourawi Alwaar Memorial University of Newoundland
Ibrahim Futheiz Memorial University of Newfoundland
Stephen Butt Memorial University of Newfoundland