The current low oil price environment has driven a renewed focus on managing costs while minimizing exposure to operational risk, and lightweight well intervention activities have not been exempt from this scrutiny.
Electric line (E-line) and conventional slickline are important and frequently used tools for light well intervention operations, and are often used at different times during the same well intervention program, leading to multiple rig-ups and rig-downs of the equipment, as well as the requirement to transport both units to the platform. This paper presents a case study of the use of digital slickline technology to perform typical slickline and typical electric line operations with the same digital slickline unit, thus saving costs and reducing risk by eliminating some rig up/rig down activities, minimizing equipment handling, and downscaling crew size.
Mubadala Petroleum performs rig less activities similar to other oil operators in the region. Both slickline and electric line equipment must be mobilized to the platform and rigged up separately. This creates inefficiency with logistics, operations, while increasing risk and results in higher overall operational costs. With the introduction of digital slickline to offshore operations, it has changed the way that Mubadala Petroleum performs rig less intervention.
The digital slickline data plots shown in this paper are representative real examples of its application. Interventions executed using real time digital slickline have proven to be safer, improve efficiency and are a more cost-effective way to conduct operations by having full real-time control of downhole tool and sensors. It also reduces total foot print of equipment and personnel during simultaneous slickline and electric line operation by utilizing a single digital slickline unit to cover both downhole mechanicals, perforation and real-time logging work scope without switching back and forth between units. Depth accuracy and shot detection was achieved with lower operational risk while working with perforation guns and explosives.
Material presented in the paper are from actual operations, with examples of perforation, depth correlation, pressure surveys, and pressure monitoring while perforating, and demonstrate the operational efficiencies and risk reduction being delivered.