Marcel Zeestraten has over 22 years of experience in the upstream oil and gas industry, including conceptual design work for surface facilities on projects in Oman, the Netherlands, the UK, Venezuela, and the Middle East. As a senior consultant, he specializes in the early conceptual design phase of projects, which requires considering multiple disciplines to identify opportunities to reduce costs and technical risks. He has delivered conceptual designs for remote gas facilities, offshore gas plants, large onshore polymer facilities, and field development plans.

1. Marcel Zeestraten, Phd
Senior consultant – Concept Engineering
Upstream Oil & Gas

2. Conceptual Surface Facilities Design
• Comprises the early stages of project development – Identify, Assess &
Select
• Is an integral part of a Field Development Plan
• Offers the best opportunity to influence the success of a project and
the value it creates
• Requires low expenditure compared to the project execution stage
• Requires a very small team of engineers, with a very broad skill set
 Solid process engineering background
 Good understanding of other oil & gas disciplines
 Reservoir engineering
 Production Technology
 Economics
 Production Chemistry
 Flow assurance
 Materials & Corrosion
 Project engineering
 Etc.
 Creativity & ability to think out-of-the-box
Front End Loading
• The practice of placing emphasis on the Conceptual Design phase in
Project Development
Conceptual Design of Surface Facilities

3. Marcel Zeestraten – Resume summary
Experience
Years
Upstream Oil and Gas industry 22
Shell International Staff Pool 11
Scotland 2
England 1
Venezuela 4
Petroleum Development Oman 4
Other roles in Oman 11
Petroleum Development Oman 4
BG group 3
Oman Oil E&P 1
Xodus (consultancy) 3
Feasibility / Select phases of project lifecycle 11
• PhD – Delft University of Technology, the Netherlands
• Core discipline: Process Engineering
• Examples of Conceptual Designs delivered are given in the next few slides
• Qualified HAZOP chairman

4. Conceptual Design Example 1: Abu Butabul – Oman Block 60
BG-Oman
Project Characteristics
• Remote location (Oman Empty Quarter)
• Gravel plain and high sand dunes
• Tight gas / condensate field
• Challenging because of marginal economics
• High level of uncertainty regarding well productivity
• Conceptual Surface Facilities design as Field Appraisal progresses
• Design capacity 90 mmscf/d of gas and 6000 bbl/d of condensate
Many different concepts considered, depending on the scale of
the development
• Extended well testing facilities
• Multiphase export to third party processing facilities
• In-field processing plant to meet export specs
Significant conceptual design aspects
• Accurate PVT characterization of well fluids
• Multiphase flow
• Corrosion and material selection
• Multiphase pressure boosting
• Gas dew point control (HC and water)
• Condensate stabilization
• Power generation
• Water disposal (evaporation pond)
• Third party contracts for processing and fluid transportation

5. Conceptual Design Example 2: Musandam Gas Plant
Oman Oil
Project Characteristics
• High GOR sour oil
• Offshore wellhead platform
• Subsea multiphase production pipeline to shore
• Export of stabilized crude to a tanker loading buoy
• Gas conditioning and export to a nearby power plant
• LPG extraction and export by road tanker
• Sulphur recovery and export by road tanker
• ‘Inherited’ process design required substantial rework.
• Facilities cost approx. $600 million
Process Plant Elements
• Slug catcher
• HP three phase separator
• Crude stabilization column
• 2 stage gas compression
• Gas sweetening (Amine process)
• Sulphur recovery (Claus process)
• Gas dehydration (TEG process)
• Gas HC dew point control (low temperature
separation)
• LPG extraction from gas condensate
• Sour water stripper
• Crude storage
• Crude export to loading buoy
• Road tanker loading for LPG and Sulphur
• Flare
• Utilities

6. Conceptual Design Example 3: Marmul Polymer project
Petroleum Development Oman
Off-plot facilities
• Massive infill campaign doubles the number of wells from 600 to 1200 – with
an option to double again to 2400 wells in future
• Surface congestion necessitates re-design of fluids gathering system
• Innovative design realizes $200 million savings in fluid gathering
• A further $100 million savings identified subject to a successful technology trial
• Design allows switch over from old to new design with minimal deferment
On-plot facilities
• Water de-oiling in the presence of back-produced
polymer challenges existing technology
 Search for innovative technologies in the market
that meet that challenge
• Substantial expansion of produced water clean-up,
pumping and polymer mixing facilities.
Total surface facilities cost exceeds $ 1 billion.

7. Conceptual Design Example 4: Field Development Plans
Petroleum Development Oman
Project Characteristics
• FDP studies for 3 clusters totaling 15 fields have been awarded to consultant
• Predominantly brown field developments
• Two clusters have been completed so far.
• Surface facilities conceptual designs identify > $100 mln in savings
Subjects Addressed
• Evaluate opportunities to recover flared gas
economically
• Trouble shoot operational problems related to control
of deep water disposal pumps with variable speed
drive
• Identify causes of poor well test accuracy
• Evaluate pros and cons of produced water re-injection
vs. injection of water from water supply wells
• Design well testing and produced fluids gathering
systems to minimize cost.
• Identify surface facilities debottlenecking
requirements to accommodate incremental
production and water injection rates.

8. HAZOP Chairman
 Approved HAZOP Chairman for Petroleum Development Oman
 Examples of HAZOP studies chaired recently:
• 11 km Gas Pipeline in Kurdistan
Client: DNO
• High GOR, 10% H2S early production facility in Kurdistan
Client: HKN