Publications

A pilot project has been proposed for a horizontal well with multistage fracturing targeting TLS sandstone formation, which could not be produced optimally by the existing vertical or deviated well profiles, to increase the mobility and drain the oil potential of the TLS sandstone formation. The first attempt to drill a horizontal well was commenced in 2015 with K-2015-1 HZ. However, due to several hole problems, the well could only be completed as a deviated well with a 57 degree inclination at TLS sandstone formation. The second attempt was made in 2019 with K-2019-6 HZ. Several well design improvements were applied, such as a 2D well profile with slim hole configuration, High Performance Water Based Mud (HPWBM), Rotary Steerable System (RSS), and geosteering services. The well was successfully drilled to penetrate 1,489 ft of lateral section at TLS sandstone formation. Unfortunately, the well could not be completed and was temporarily suspended due to failure during liner hanger operation. In 2022, the third attempt was made by sidetracking from the main bore (K-2019-6 HZ) through K-2019-6 HZ ST with a similar well design. The game changer in this well was the implementation of a modified liner hanger. In general, the well was successfully drilled to penetrate the 1,847 ft lateral section at TLS sandstone formation. This improvement resulted in up to 98% downhole related NPT reduction between K-2015-1 HZ and K-2019-6 HZ ST. Implementing this improvement, the first horizontal well in the A-field was successfully drilled without any significant hole problem and zero Loss Time Incident (LTI). The operation could then proceed with the completion with a high potential of oil gain through multistage (7 stages) hydraulic fracturing.