Casing Exit Excellence: a Holistic Strategy of Integrated Engineering Models and Well Integrity Analytics for Extended Reach Wells

Abstract

The increasing prevalence of re-entry wells, in response to global demand, necessitates casing exit operations in wells with low production potential, multi-lateral configurations, and obstructions. The rise of extended-reach drilling, facilitated by advanced technology, underscores the evolving landscape and challenges addressed by integrated analytics in this dynamic field. This paper concentrates on optimizing casing exit operations, particularly in extended reach drilling through the integration of technical torque drag and hydraulic model analytics, this approach aims to bolster efficiency while prioritizing well integrity.

The proposed methodology integrates torque, drag, and hydraulic considerations utilizing advanced simulation and analytics, this unified model comprehensively assesses downhole conditions, prioritizing well integrity for casing exit operation. By merging mechanical and hydraulic aspects in pre-job planning, the engineering team provided a holistic understanding, facilitating real-time monitoring and adjusting. This approach empowers dynamic parameter adjustments during casing exit operations, ensuring a proactive stance towards potential challenges. The proposed methodology delves into the technical intricacies of drillstring design and the strategic placement of heavy wall drill pipes.

The integrated model's effectiveness extended to overcoming challenges in the wellbore restrictions, drilling fluid system crucial aspects of casing exit operations for running in the hole, setting, and milling the window. The comprehensive technical engineering modeling incorporated recommendations for optimizing the drilling fluid system, flow rates, and pumping pressures. By technical optimization of these parameters, the integrated solution contributed to reduced friction factors, mitigating torque and drag issues during casing exits. Additionally, the model provided friction factor recommendations that significantly improved the overall drilling efficiency. Notably, the model's capability facilitated real-time adjustments in whipstock setting and milling parameters, allowing the system to seamlessly navigate complex downhole environments in the extended reach job. This approach adeptly manages buckling near liner hanger depth, guaranteeing a secure reach to the total depth crucial for the successful running and setting of the whipstock in a single trip at a setting depth of 18500 ft.

In conclusion, the holistic integration of technical torque and drag with hydraulic models’ analytics represents a significant advancement in casing exit operations, emphasizing the paramount importance of well integrity. This approach improves decision-making, and operational efficiency, and also serves as a proactive strategy to safeguard well integrity throughout the entire casing exit process.