Adil Pottayil

Regional Manager APAC and Senior Consultant

Calsep Asia Pacific SDN BHD

Phone: +60 3 2162 6551

Consulting Services, examples


Resident Fluids Engineer and PVT Specialist
Hired into a major NOC in APAC region to provide advisory services for streamlining modelling workflow for the Operator and develop fluid characterisation guideline standards. The role also involved providing on the job training to flow assurance engineers in using PVTsim Nova spanning across their assets.

Wax Deposition in a Well
The fluid was characterized to match measured wax content of the crude and wax appearance temperatures. Eighteen different production scenarios were evaluated with varying GOR, water cuts and oil production rates. Wax deposition in the well was observed in 5 out of the 18 scenarios.

Modelling of Ultra lean Gas condensate samples
This study included developing common EOS models for ultra-lean condensate samples from Malaysia. The samples included BHS and Separators samples. Bottomhole samples were contaminated, and the separator samples were collected during unstable flow. The objective of the study was to QC a set of 30+ PVT reports and calibrate the compositional data to develop model that matches the observed well flow rates from different reservoirs across the field.

Asphaltene Screening, Modelling and Lab Work Design and Data Interpretation for Low Asphaltene Content Fluids
Study involved Asphaltene precipitation potential assessment of fluids with very low Asphaltene content. The project required screening samples for laboratory analysis and optimizing lab measurement to be cost-effective and ensuring the program covers PT areas of operational interest. Finally, the scope included interpretation of lab data and developing model that matched observed Asphaltene onset with and without gas injection using Cubic EOS.

Field wide modelling for 17 OBM contaminated reservoir fluids and modelling Gas Oil Contact
This project involved developing a Field wide EOS model for heavily contaminated samples collected across 8 years of the exploration and development of green field in Asia Pacific region. The 17 bottom samples were collected across multiple stacked reservoirs. The project also required the model to match an expected Gas-Oil-Contact determined by pressure logs.



OTC-26070-MS  : A Study on Phase Behaviour and Its Application To Cryogenic Technologies For Treatment Of High CO2 Gas Fields
Dhanaraj Turunawarasu, Rohaizad B. M. Norpiah, and Adil Pottayil, CALSEP A/S
Offshore Technology Conference Brazil held in Rio de Janeiro, Brazil, 27–29 October 2015.

Wax Deposition in North Sea Reservoir Wells: Field Observations and Simulations
P. Bartolome; P. Tybjerg; A. Pottayil
17thInternational Conference on Multiphase Technology, Cannes, France, 10-12 June 2015

SPE-210631-MS A Thermodynamic Model for Prediction of Solubility of Elemental Mercury in Natural Gas, Produced Water and Hydrate Inhibitors
L.T. Lim, Calsep Asia Pacific Sdn. Bhd.; H. Sorensen, Calsep A/S; S. Leekumjorn, Calsep Inc.; A. Pottayil, Calsep Asia Pacific Sdn. Bhd.
SPE Asia Pacific Oil & Gas Conference & Exhibition 2022, Adelaide Convention Centre, Australia, 17-19 Oct 2022


2005 – 2017 Executive Masters in Business Administration – Finance S.P.JAIN Institute of Management; Dubai, UAE
1999-2003 Bachelor of Technology in Chemical engineering T.K.M College of Engineering, University of Kerala, India



2014 –      Regional Manager APAC and Senior Consultant, Calsep Asia Pacific Sdn Bhd.
2011 -2013 Regional Technical Engineer and Senior Consultant, Calsep Asia Pacific Sdn Bhd.
2006 – 2011 Senior Project Engineer – Special Projects, Schlumberger, Reservoir Sampling & Analysis, Dubai, U.A.E
2004 – 2006 Sales Engineer & N.M.C Trading Est. , Industrial Laboratories Solutions, Dubai, U.A.E
2003 – 2004 Chemist / TBP Technician at Intertek Caleb Brett, Fujairah, U.A.E



For more information about Calsep office locations, phone and fax numbers, please go to Calsep locations.


Calsep A/S
Headquarter & Europe


Calsep FZ LLC
Middle East


Calsep, Inc.

Kuala Lumpur

Calsep Asia Pacific Sdn Bhd
Asia and Pacific