Modeling the Impacts of Downhole Choking on Wellbore Pressure Profile and Production Fluid Allocations on a Multiple-zone Intelligent Well System (SPE-113416)

摘要

Because Intelligent Well Systems (IWS) typically address multi-zone (commingled) production or injection wells, it is important to develop a well deliverability model with several key features, including; a.) Multi-zone inflow/delivery, including the reservoir and fluid properties for each zone; b.) Multiple production/injection flow paths to accommodate tubing flow for one zone and annulus/tubing flow for other zones; and c.) Simulation of the effects upon wellbore pressure and flow distribution due to geometry changes within a completion string (i.e., gravel pack system, flow control equipment, etc). An analysis tool applying integrate IPR technology has been developed to fill this purpose. For any IWS operation scenario, the flow allocations, wellbore pressure profile and the fluid velocity profile can be predicted. This provides the operators the insight into how to choking the downhole valves to meet the production enhancement target. It also gives an insight of how we customized design the downhole valve settings to achieve the production objectives. In an addition, the threshold pressure at commingle point to control crossflow can be predicted through this technology, and this provides us potential ability to control/monitoring possible crossflow of multiple zones production through the intelligent well monitoring and control system. For demonstration purpose, a typical intelligent well system with electrical submersible pump (ESP) installation case was used for analysis.