OPTIMIZATION OF WELL DESIGN WITH SMALL BOREHOLE DIAMETER

The energy sector is increasingly concentrating on optimising well designs with tiny borehole diameters due to the requirement to strike a balance between operational and financial efficiency. Conventional well designs frequently use bigger borehole diameters, which are efficient but come with high material and operating expenses. With a focus on their potential for cost savings, enhanced drilling performance, and environmental advantages, this study investigates the viability of slimhole designs. By using less fuel, steel casings, and drilling fluids, smaller boreholes can minimise overall operating costs, as evidenced by recent developments in slimhole technology. An analysis of trajectory optimisation in horizontal wells with ultra-short radii shows that it can increase extraction efficiency by as much as five times, especially in unconventional reservoirs. Reduced borehole diameters also present structural integrity difficulties that call for creative methods to wellbore stability, as demonstrated by computational and experimental research. This study evaluates material characteristics, flow efficiency, and mechanical stability under a range of operating conditions using contemporary computational tools and analytical techniques in order to address these issues. The study also highlights the trade-offs that come with slimhole designs, including possible decreases in production rates and higher drilling precision requirements. It covers methods for overcoming these constraints, such as the use of innovative materials, improved drilling methods, and sophisticated wellbore trajectory planning. ‘Slimhole technology' long-term economic and sustainability advantages are demonstrated through comparisons with conventional well designs. In addition to providing a sustainable strategy to optimise well design while addressing environmental concerns, the research findings have implications for the production of geothermal and hydrocarbon energy. This research adds to the expanding corpus of information on effective well construction by utilising state-of-the-art developments and established methodologies. Real-time monitoring system integration should be the main goal of future research in order to significantly improve performance and lower hazards in tiny borehole operations. In the end, the findings imply that using optimised slimhole designs can improve energy projects' environmental sustainability and financial feasibility. Keywords: well design optimization, small borehole diameter, slimhole technology, wellbore stability, drilling performance, cost reduction.