Taking the Third Generation Multiphase Meter Subsea - Challenges and Design Choices

Abstract

Abstract This paper presents an overview of the processes, design and technology choices behind taking the latest multiphase meter (with new measurement, visualization and tomographic techniques) subsea. The paper will look at applications for the new meter and the benefits of designing a subsea version. With Asian operators' increased focus on EOR and flow assurance, harsher offshore environments and production over a wider range of process conditions, the new meter will have significant applications for accurately measuring flow rates under varied conditions. The paper will describe the development process behind the new subsea meter. It will examine how a new flow computer was developed to enhance communications, the extended GVF range, and improved salinity measurements to allow more accurate measurements of flow in high water liquid ratio (WLR) and when GVF is high. The paper will look at the design challenges in adapting what was previously a topside meter for HP/HT environments subsea and the challenges of developing a more compact version without technology compromises. This compactness is crucial, with many subsea manifolds in Asian fields already crowded with instrumentation. The paper will provide an important technical contribution towards the goal of increasing flow assurance in Asia's offshore fields and will demonstrate how the new design concept and technology will be crucial for more complex condition monitoring and intelligent metering in the future.