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Research in Produced Water Treatment and Oil in Water Measurement at Aalborg University

Zhenyu Yang Associate Professor, BSc., MSc., PhD. Department of Energy Technology Aalborg University, Esbjerg Campus Denmark Secretary & Treasurer of IEEE Danish joint Chapter CS023 & RA024 Leader of research program on Offshore Energy Systems at ET-AAU

NEL Produced Water Club Meeting

WELCOME TO THE HEART OF DENMARK

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Organisation

Strategic Networks: • EMSD • CEES • ECPE • VE-NET • DUWET • WEST • VPP • REN-DK • HUB NORTH • Energy Sponsor Programme

Fluid Power and Mechatronic

Systems

Fluid Mechanics and Combustion

Electric Power Systems

Power Electronic Systems

Electrical Machines

• 60 VIP • 80 PhD • 20 Guest Researchers • 10 Research Assistants • 30 TAP

Lab. Facilities: • Power Electronics Systems • Drive Systems Tests • Fluid Power • Power Systems & RTDS • Micro Grid • High Voltage • DSpace • PV Converter & Systems • Laser Systems • Fuel Cell Systems • Battery Test • EMC • Vehicles Test Lab • Biomass Conversion Facilities • Proto Type Facilities • Offshore lab

Thermal Energy Systems

Department of Energy Technology

Smart Grids and Active Networks

Wind Power Systems

Fluid Power in Wind and Wave Energy

Biomass

Photovoltaic Systems

Modern Power Transmission Systems

Fuel Cell and Battery Systems

Automotive and Industrial Drives

Efficient and Reliable Power Electronics

Thermoelectrics

Green Buildings

Multi-disciplinary Research Programmes

Microgrids

Offshore Energy Systems

Esbjerg Section

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OES Mission

The OES program aims to explore, research and develop innovative and breakthrough engineering methodology/methods and technology/techniques for harnessing different type of offshore energy in a

reliable, sustainable, cost-effective, and environmentally-friend manner.

Over 71% of the earth surface is covered by water

Offshore Energy Systems

• Mathematical modeling • System estimation • Parameter identification • Optimization algorithms • Advanced control • Smart automation systems • Condition monitoring • Fault detection & diagnosis • Fault tolerant control • System reliability analysis • Reliable automation design

• Offshore oil & gas production processes

• Underwater robotics • Offshore wind energy

Key Competence

Key focus

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Current PWT Relevant Projects • Plant-wide De-oiling of Produced Water

using Advanced Control (PDPWAC) (Højteknologifonden, 10mill DKK, 04.2013-10.2016)

• GreenOil Lab: Green PWT for Offshore OG Production, (Det Obelske Familiefond & AAU, 7mill DKK, 01.2015-03.2016)

• Smart Water management Systems (SWMS), (DTU-DHRTC, 4.7mil DKK, 02.2016-01.2019)

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Smart Water Management Systems (SWMS)

Plant-wide De-oiling of Produced Water using Advanced Control (PDPWAC)

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Plant-wide PWT Strategy

Maximally utilize the degrees of freedom hidden among interactive subsystems

Typical PWT Technologies

De-Oiling Hydrocyclone Technique

• Apparently, almost 90% of offshore PWT facilities are based on hydrocyclone technology

• A facility using the principle of enhanced gravity separation. A typical hydrocyclone can build up gravity fields of 2000-3000g

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Efficiency Measurement & Control

• 100%*(OiW_feed - OiW_underflow)/ OiW_feed

• OiW measurement? – Offline: OSPAR recommended GC-FID method, ….

– Online monitoring: … multiphase flow measurement!…

– Reliability? Precision? ….

• Maintaining high efficiency? – Cyclone Control! – Performance control mechanism(s)? …

– Key Perforamnce & Disturbance Parameters (KPPs, KDPs)? …

– Dynamic characteristics? … key indices?

• Dynamic Coupling with upstream and downstream systems? – plant-wide optimization!

• …

Online OiW Monitoring (I)

• fluorescence‐based OiW monitor (Turner TD-4100XD, 5 sets)

Online OiW Monitoring (II)

• Image-based OiW monitor (Jorin ViPA analyser, 2 sets)

Online OiW Monitoring (III)

• Tomography techniques (ERT & ECT)

One set AC-ECT equipment from ECT Instruments Ltd (UK) Guest lecture on May 06, 2016

Online OiW Monitoring (IV)

• Other flowmeterings: EM, Ultrasonic, Coriolis, … nonradiative multi-phase flowmeter (ABB)…

Hydrocyclone Control

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Challenge: Cyclone Dynamic Performance

• [15], [17] investigated the transient behavior of a de-oiling hydrocyclone subject to varying inflow rates.

• Some questions are still unclear, such as: how the influence of varying inflow rates to the flow structure, dynamics and stability inside the hydrocyclone; how the simple controllers used in their study could be improved and optimized; as well as discussion of this control improvement potentials & limitations

Equivalent Control Structures

Robust control theory!

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Anti-Slugging Flow Control

NEL Produced Water Club Meeting

Servere Slug - Emulation, Analysis & Control

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GreenOil-Lab Vision

• The shared vision is that we believe that the ceramic-membrane based filtration combined with an optimal operation strategy will be a fundamentally decisive technology for cost-effectively achieving the zero-discharge ability for Produced Water Treatment (PWT) in offshore oil & gas production.

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DTU Provost TAW

Steering Committee

Scientific Director

Reservoir Characterisati

on

Scientific Director

Enhanced Oil & Gas

Recovery Processes

Scientific Director Drilling & Pro. Tech. Design & Concepts

Scientific Director

Production Facilities &

Material Research

Scientific Committee

Director of Research Centre

PA Stra./Edu

. Adm. Lab.

Danish Hydrocarbon Research and Technology Centre (DHRTC)

Smart Water Management Systems (SWMS)

Water Treatment Lab Facilities

Smart Water Management Systems (SWMS)

Offshore Lab Facilities

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Thanks for your attention!

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