Lost Circulation Materials (LCM) - The Utilisation of Sealing Agents in the Conditions of Selected Iraqi Oil Deposits

Abstract

This thesis explores using utilization of lost circulation materials (LCMs) as a remedial solution for formations (Dammam & Hartha and Mishrif) losses encountered during oil well drilling operations in different Iraqi oilfield, in different years and different formations. Losses of drilling fluids into porous formations considered as a major challenge to wellbore stability and overall drilling efficiency. As response to solve this issue, this study investigates the effectiveness of various LCMs and analyzed in order to minimize fluid losses and maintaining well integrity further to mitigate these losses are crucial to minimize nonproductive time (NPT) and costs related to the severity of fluid lost to the formation. The research methodology involves a comprehensive literature review, laboratory experiments, and case studies to analyze the performance of different LCM materials in common geological formations in Iraq (Dammam & Hartha and Mishrif). Results indicate that the practice of using LCMs not only mitigates fluid losses but also contributes to the enhancement of wellbore stability and overall drilling performance. Furthermore, this thesis provides insights into the economic and environmental implications of using LCMs as an effective solution for formation losses. The findings offer practical recommendations for drilling engineers, highlighting the potential benefits of incorporating LCMs into standard drilling fluid systems. In conclusion, this research contributes valuable knowledge to the oil fields of drilling engineering by presenting applicable strategy for managing formation losses. Using LCMs one of method to avenue for minimizing the environmental impact of drilling operations while optimizing overall drilling efficiency.