Abstract: To address the poor understanding of fracture connectivity in the Ksf and Kan formations in the Ebano Oilfield, the fracture connectivity in the longitudinal and planar directions was studied with core analysis, PLT testing, imaging logging data, reservoir numerical simulation and seismic coherent attribute technologies. It was found in the study that the Ebano Oilfield was dominated by semi-open fractures which included high-angle tectonic fractures in the near north-south direction and horizontal bedding fractures in the near east-west direction, and the high-angle fractures and horizontal fractures formed a complex network system of fractures; the fracture connectivity of the Ksf and Kan formations was divided into three types: excellent top-bottom connectivity, normal top-bottom connectivity, and top-bottom disconnection; fracture and crude oil viscosity were the main controlling factors to determine the productivity of oil wells, and the length of the horizontal interval had little effect on productivity. The study results were applied to short horizontal section development tests in the southeastern of Ebano Oilfield, and achieved better development results. The average initial daily oil production of a single well in 2020 was 141% of the average initial daily oil production of a single well from 2012 to 2014. There is much for reference of the results of the study to different types of fracture development.

Key words: fracture development pattern, horizontal well, numerical simulation, optimal design, Ebano Oilfield, Mexico