Publications

Thin overburden barrier (shallow reservoir depth 600-800 ft), ductile properties with Young’s Modulus less than 500Kpsi, and highly-heteregenous reservoir led to limitation of completion strategies. Various development scenarios have been implemented to the enhance productivity index in this reservoir. Several methods were carried out by completing the wells with cased-hole high density perforation, combined with hydraulic fracturing, and waterflood support. Unfortunately, this shallow Telisa Low Quality Reservoir (LQR) created another problem in managing cap-rock integrity to handle these initiatives together. Started from 2010, all activities which may risk cap-rock integrity were decided to shut down and all development in Telisa LQR were discontinued, led to low-recovery factor. A comprehensive lookback was conducted in 2022 following by series of surveillances and studies suggesting a staging development scenario. On short-term basis, low-risked completion method (Open-Hole Liner) were introduced that targeting faulted area in order to gain secondary permeability from natural fractures. Large-scale infill drilling combined with hydraulic fracturing and pattern injection will be used in the long-term to maintain reservoir pressure in this shallow reservoir. These efforts have successfully delivered an additional 1.54 MMSTB of cumulative production and flattened the field decline, establishing a refined factory mode and an exceptional accomplishment. This paper presents a comprehensive analysis of challenges and best practices within each completion method, serving as a valuable model for maximizing output in similar complex reservoirs and contributing new knowledge to LQR development in the oil and gas industry.