Quad-Lateral Success Story in a Heavy Oil Reservoir

Abstract

Abstract This paper documents the success story of the first quad-lateral completion for an Alaskan operator using stacked, rotatable, level 3 junction systems. This well is also the first in the world where the junction system is stacked more than twice in a single well. This quad-lateral completion design is the product of targeting multiple formation layers from a single wellbore by use of open-hole horizontals with slotted liners. The rotatable, multi-lateral junction system has evolved since the first successful installation on Alaska's North Slope in 2007; it accommodates the increased number of laterals necessary for continued economic exploitation of the West Sak heavy oil reservoir. Diligent communication and preparation were required by the operator and the service provider to successfully execute the installation of this complex completion design. Other keys to success were extensive equipment QA/QC performed prior to mobilization to the rig site and appropriate personnel from the operator and the service provider on location during installation to assist rig personnel. The quad-lateral completion with stacked junction systems was installed nearly flawlessly from both a time and cost perspective. This successful installation paves the way for the operator's future heavy oil development plans, which include penta-lateral completions using the same stacked junction systems. This quad-lateral completion design with stacked, rotatable, junction systems is a first globally. This success story will provide insight to other operators faced with similar challenges.