PETROLEUM ENGINEERING

The interaction between drilling fluids and rock surfaces is a critical aspect of drilling operations in the oil and gas industry. This study investigates the multifaceted effects of drilling fluids on rock surface properties, including alterations in surface roughness, wettability, and chemical composition. The research employs a combination of laboratory experiments and analytical techniques to analyse the impact of various drilling fluids, such as water-based, oil-based, and synthetic muds, on different rock types commonly encountered in drilling operations. The findings reveal that drilling fluids play a significant role in modifying rock surface
characteristics. Water-based fluids tend to increase rock wettability, while oil-based fluids can reduce it. Furthermore, the study explores the implications of these changes on drilling efficiency, wellbore stability, and reservoir connectivity. Understanding these effects is crucial for optimizing drilling fluid selection and designing drilling strategies that enhance overall drilling performance and reservoir productivity. This research contributes valuable insights into the complex interplay between drilling fluids and rock surfaces, aiding in the development of more efficient and sustainable drilling practices in the energy industry.

This study investigates the dimensionless pressure and pressure derivative responses of a horizontal well within a reservoir characterized by inclined impermeable boundaries. Horizontal wells have gained prominence in recent years due to their potential to enhance hydrocarbon recovery from unconventional reservoirs. However, their behavior in reservoirs with nonconventional boundaries remains less understood. In this research, we employ analytical and numerical techniques to model the pressure and pressure derivative responses of a horizontal well situated in such a reservoir. By utilizing dimensionless analysis, we aim to generalize the findings across various reservoir conditions and well geometries. The influence of inclined impermeable boundaries on well performance is examined, considering factors such as boundary angle, reservoir anisotropy, and wellbore inclination.
Through comprehensive simulations and sensitivity analyses, key insights into the behavior of horizontal wells in reservoirs with inclined impermeable boundaries are elucidated. The derived dimensionless pressure and pressure derivative solutions provide valuable tools for reservoir engineers to optimize well design and production strategies in such challenging environments.
This study contributes to a deeper understanding of the complex interactions between wellboregeometry, reservoir boundaries, and fluid flow dynamics, paving the way for more efficient exploitation of hydrocarbon resources in unconventional reservoirs.

The purpose of this project titled “illustrations of measurement while drilling, weight on bit and torque on drilling performance” is to increase drilling efficiency in directional wells, peaks and troughs are characteristic of the nature of the oil and gas industry. With current prices hovering just above $60 per barrel (Bloomberg, 2019), it has never been a better time to increase the efficiency of the drilling process. This research focuses on the control of surface parameters to understand vibrations in directional wells; this paper discusses actual cases where the use of data from these downhole sensors has improved drilling performance In conclusion to this research parameters such as WOB and RPM were varied and their effects on depth drilled, response torque, ROP, MSE were studied
for vertical well configuration and directional well configurations.