Successful Integrated Production Optimisation from Multi-Zone Infill Wells Utilising First Application of Electrical Inflow Control Valve ICV in D-Field, Offshore Malaysia

Abstract

Abstract Mature Field-D has produced at recovery factor (RF) less than 20% due to its geological complexity. As per re-development plan, four wells were drilled from newly built platform in 2020. Each well was completed with combination of oil and gas zones with maximum five zones per well. The gas zone is utilized as an in-situ gas lift, considering gas lift gas shortage and anticipated future requirement for artificial lift upon pressure depletion and water breakthrough. All-electrical inflow control valve (ICV) and permanent downhole gauges (PDG) has been installed across each respective oil & gas zone. The system serves to provide zonal production control to mitigate high producing gas-oil-ratio (GOR) or water breakthrough zones. Single string multi-zone ICV completion enables maximum production from layers with varying reservoir properties and pressure depletion. In addition, gas zones completed with ICV enables cost-effective application of in-situ or well-to-well gaslift, facilitates future non-associated gas production for gas monetization project as well as gascap blowdown opportunities. Application of all-electric smart completion has enhanced proactive surveillance and provided greater production control flexibility resulting in higher production than target. From the downhole data obtained from PDG, wells and network model were updated with good certainty and used to further optimize production at well, platform and field level. Multiple ICV configuration were simulated to maximize oil, minimize gas and water production considering facilities limitation in terms of liquid handling and gas processing to reduce carbon footprint. The gas zones have been utilized for in-situ gas lift using ICV. The smart completion has also enabled efficient unloading facilitated by real-time data acquisition and production control through ICVs leading to additional cost savings. It marks the first installation of an all-electric smart completions offshore Malaysia and Asia Pacific. This paper will explain the functionality of all-electric ICV system and outlines the methodology undertaken to optimize production at well, platform and field level utilizing industry recognized well and network models.