Case Study of a Customized Solution for Intervention Operations to Increase Well Production

Abstract

Three wells on an aged platform required extensive intervention operations due to several downhole issues. This paper will review the life cycle of the project and focus on the efficiencies of the customized system which was used to increase production of the wells. Due to several challenges and limitations associated with the platform, traditional methods were neither operationally practical nor financially viable. New technology in the form of a fit-for-purpose system was utilized to safely and effectively complete all necessary procedures. The system, which includes a pulling unit, provided the foundation to support multiple resources and offered a complete integrated solution. The modular design of the pulling unit and the efficient operational capabilities allowed for operations to be conducted within the parameters of the platform. Because the platform was in 73 ft of water, the operator first considered using a rig for the operation, but eventually reconsidered based on overall project costs and space limitations. Furthermore, there were production operations ongoing which, if halted, would result in a financial loss. A rigless, crane-based program was not an option because extensive fishing was needed and required high pulling forces. When a casing hanger became stuck, the design of the pulling unit facilitated a seamless switch from supporting the downhole operations with the hydraulic mast to pulling with the integrated casing jacks. The ability to customize the pulling unit enabled safe and efficient operations to be completed and resulted in a 300% production level increase. With platforms and wells have varying characteristics, the operational equipment spread needs to be customizable to each project's parameters and be able to provide a full range of services. This paper will cover how the pulling unit challenges the traditional methods of rigless intervention to provide cost-effective solutions that help to significantly reduce high operating costs.