Digital Production Optimization Boost for North Caspian Field With 3-PhaseReal-Time Downhole Flow Metering System From Enhanced IntelligentCompletion

摘要

For the first time,one of the Russian oil company empowered to change standard approach to wellproduction optimization by using a new generation of intelligent completion technology-the all-electricalsystem with fine inflow control and downhole flow characteristics measurements that were previouslyunavailable in real time.The experience of optimization approach,which is unique for both the Russianand the world oil industry,is described in this article.The standard approach to well optimization was time consuming and,in some cases,associated withcomprehensive testing and well interventions.The new approach allows testing and optimization of wells inreal-time within shortest period with no production logging,well shutoffs and production loss,and allowsto obtain phase rates and fractional composition of the flow for each well interval.The described technique was consistently introduced and improved by x-segment specialists fromproduction and science departments.Accumulated real time data and special downhole testing made itpossible to obtain a unique knowledge about zonal flow behavior during various stages of well operationsstable work,well testing,build ups,shut offs,well starts,clean ups and optimizations.The new technique at this stage allows:1.Optimize well clean-up;2.Introduce new well testing procedure with minimum production,3.Minimize interventions;4.Reduce time for full well optimization cycle to 2 days;5.Introduce procedure for well shut-in preparation for wells with high GOR and watercuts;6.Minimize cost and risks associated with interventions,zonal testing,optimizations.Background for the described technique introduction are innovative scientific research and experimentswith the aim of obtaining fractional composition and phase rates in real time with a minimum set ofdownhole sensors.The article describes the theoretical foundations of the approach,innovative areas ofresearch and methodology for improving the models and applied correlations.Scientific solutions coupled with implementation of advanced completion technologies,machine learningmethods,as well as depth of field experience have improved the approach to solving well optimizationchallenges of wells on the North Caspian field.The experience gained from the first three wells was usedto expand the technological and interpretation capabilities of the described solutions.The one of the key advantages of proposed optimization methodology applied on wells with presentedtechnological equipment is simplicity and elegancy of approach.The total number of downhole valveposition change during various operations for three wells exceeded 1500 within less than 1 year of operationtime.To the moment,the methodology,the experience gained,the results of the approach implementation areunique for the oil industry.The presented technologies and digital solutions make it possible to improvewell management strategy significantly and,of course,will be interesting to engineers of field managementdepartment.