Alexey Marchenko Email & Phone Number

ResponsibilitiesEnsure Technical assurance of all aspects of the reservoir engineering domain. Lead and coordinate a diverse subsurface team to optimize collaboration.Drive well and reservoir performance, including waterflood management. Proactively tackle operational issues, establish and track performance metrics, and champion sustainability initiatives. Develop comprehensive field development plans, surveillance strategies, and robust appraisal plans.Lead efforts to maximize hydrocarbon production through advanced well optimization strategies.Cultivate strong engagement with shareholders and stakeholders to secure backing for key development initiatives.Provide impactful mentorship and technical guidance to junior engineers, fostering their professional growth.Achievements:Pioneered a pan-asset sidetrack campaign, extending the production plateau by three years and unlocking a 13% increase in recoverable reserves.Secured completion optimization strategy that enabled pan-asset standardized well-designOptimized well and reservoir-integrated review workflows that enhanced team efficiencyDelivered value of information study for exploration plan that shareholders supported Key challenges: offshore environment, scale issues, sand production, process stability, out-of-zone water injection, commingled wells, well integrity in aging asset

Responsibilities:Provided Technical assurance of reservoir management aspects in the reservoir engineeringLed peer reviews to ensure high technical standards of the studyInterfaced with programming, production operation, and development departments Developed reservoir management, surveillance, and well intervention plans Monitored well performance and analyzed well data on a daily basis Performed analytical-based work: declines curve, pressure transient, material balance analysis Leaded integrated well and reservoir reviews to ensure optimum field development Providing mentoring and technical coaching to less experienced engineers Achievements:Developed and executed reservoir management and intervention plan that enabled stable field performance and reduced operational risks on several wells enabling its performance to reach full potential Implemented advanced data analysis tools for routine wells monitoring that enable efficient reservoir management, production allocation, earlier water and sand production identificationMade a material impact on optimizing new well targets; delivery successful according to the scorecard.Created a workflow for mid-term gas production forecasting with subsurface uncertainties, which is still the primary tool for forecastingOptimized well integrity testing schedule. The business improvement initiative has won a corporate prize.Key challenges: wells management with integrated gas chain, water and sand production in high capacity wells, subsurface data uncertainty

Sakhalin Region, Russian Federation

Responsibilities:Matured individual wells, sidetracks, workover opportunities Constructed and maintained reservoir simulation model with static-dynamic close-the-loop Performed annual reserves estimations as per SEC/PRMS and as per government regulatory compliancePerformed annual long-term production forecast and drilling plan updates for the business planning cycleEconomic screening assessment of development opportunities Assessed production potential and recoverable volumes of contingent portfolio Studied development plans for green and matured reservoirs to maximize recoveryExecuted core data gathering plan, managed routine and special core analysis lab experiments Achievements:Led pan asset gas debottlenecking project with the potential to increase production by 100%Implemented gas reservoir appraisal and data gathering plan (including core and PVT sampling) with comprehensive value of information studyMatured workover execution strategy that safeguarded 30% of production in the Astokh areaTimely delivered integrated reservoir model update study that improved field understanding. Matured producer and injector wells; the wells performed according to the scorecardLed an update of the Field Development Plan (FDP) for the Astokh region, resulting in a 20% increase in recovery.Key challenges: reservoir complexity, subsurface data uncertainty and integration, different interests of diverse stakeholders

Responsibilities:Delivered mid and long-term production forecasts for gas and oil fields Performed integrated production system modeling and forecasting coupled with reservoir modelsPerformed analytical-based work: declines curve, pressure transient, material balance analysis Built gas and oil reservoir models and maintained numerical simulation models to dateBuilt simple box -models and sector models to improve reservoir understandingIntegrated new relative permeability, PVT, PLT, RFT, 4D, and new well data into reservoir simulation model Prepared reservoir engineering input for well intervention and drilling programsPerformed studies to ensure optimum depletion strategy for gas and oil reservoirsManaged production and subsurface data sustained data quality in the reservoir engineering domainAchievements:Delivered reservoir engineering work scope for the Piltun area Field Development Plan (FDP) update, which increased recovery by 15%. The FDP was 100% executed, and the profitability of development wells was confirmed by production.Completed integrated subsurface modeling study coupled with surface production system modeling for Lunskoye gas development that secured reliable business planningFulfield reservoir engineering input for onshore process facilities (OPF) gas compression project that enables timely project execution scheduleStandardized simulation modeling scripts and workflow across the organizationImplemented probabilistic reservoir modeling workflow that captured static and dynamic uncertainties.

Master'S Degree, Renewable Energy Development

Master Of Science (Msc), Petroleum Engineering

Bachelor, Applied Mathematics