Use of Multiphase Flowmeter to Manage Well Test in a Satellite Field: Experience from the Niger Delta

Abstract Real-time measurement of individual well performance is essential for reservoir characterization, production optimization, and field management. However, offshore satellite fields face constraints such as limited topside space, high mobilization costs of testing equipment, and logistical complexity. Conventional test separators, though reliable, require substantial infrastructure, often impractical in remote or space-limited environments such as satellite offshore fields. Traditional methods of well testing and surveillance in such locations include "test-by-difference" using a remote test separator or deploying mobile test skids. These methods are associated with significant drawbacks including high operating cost, increased HSE exposure, production deferments, and lack of real-time data. This paper presents a case study on the deployment of Multiphase Flowmeter (MPFM) technology as a strategic solution for well testing and surveillance in offshore satellite oilfield developments and management. MPFMs enable continuous, real-time measurement of produced fluids from individual wells, reducing operational footprint and offering a cost and space efficient alternative where test lines are uneconomic or environmentally burdensome. However, we found that MPFM performances are vulnerable to several factors such as robustness of the underlying PVT model, prevailing fluid phase behavior and flow regime, as well as calibration requirements, necessitating careful integration with conventional practices to assure continuous accuracy and reliability of results. We compare MPFM performance against a conventional three-phase test separator located 20 km away, highlighting both benefits and technical limitations. Overall, MPFMs have significant potential to enhance well-test operations, surveillance, and production optimization in offshore satellite fields where conventional testing is costly or operationally restrictive.