A Dynamic Optimisation Technique for Simulation of Multi-Zone Intelligent Well Systems in a Reservoir Development

摘要

Intelligent well technology provides an operator the capabilityto remotely control, monitor and manage multiple horizons ina given well. Application of the technology has providedsignificant value, through the ability to control multiple zonesindependently, reduce total number of wells, reduce futurecostly well intervention, accelerate production between zonesto maintain a plateau for extended period of time.Common reservoir simulation tools are not well suited tomodel the performance of wells with downhole flow controldevices, and specifically have difficulty automaticallyoptimising the configuration of intelligent well control valvesin the time domain, to maximise objective functions such asdiscounted production or hydrocarbon reserves recovered.This paper reviews the process and results of reservoirsimulation and modelling of a multi-layer, compartmentalizedclastic oil reservoir with strong aquifer drive, developed usingintelligent well technology. The paper describes the processby which an optimisation technique was incorporated in thesimulator, with the ability to model binary and multi-positiondownhole intelligent well Interval Control Valves (ICVs).The optimisation technique described was used to simulatethe performance of a multi-layered commingled reservoirdeveloped with intelligent wells. The production forecastsquantify the benefit of multi-position interval control valvesover base case conventional development scenarios. For thetypical reservoir studied, intelligent well systems accelerateproduction and maintain a longer plateau period whencompared to conventional completion techniques.