This document contains the professional profile and experience of Mohsen Maddahi, a petroleum engineer based in Iran. It outlines his contact information, skills including process simulation software and languages, education as a petroleum engineer, and work history in various roles for oil and gas companies in Iran. His experience includes well operations, production monitoring, facility commissioning and startup, and process engineering responsibilities.

1. Mohsen Maddahi
Address: Bahonar, Shiraz, Iran
Cell: +989133453513,+989178256394
Email: mohsen.maddahi@yahoo.com
PROFESSIONAL PROFILE
 Well acidizing, chemical injection, wellbore washing and perforation design and
supervision
 Well Production monitoring, data analysis and plan for workovers including
Acidizing, N2 lifting, Perforation, welltesting and etc.
 Provide procedure for commissioning start up and operation of oil and gas
facilities.(Even the devices under licensors) and supervision on operation with
confirm analysis of product and find alternatives for solve Off spec. Products
 Using HYSYS software in case of predict the function of plant
 Troubleshooting and analyzing process data at Upstream and Downstream oil and
gas industries.
 Familiar with standards and codes used in oil and gas industry.
 Familiar with process design documentation such as PFDs, P&IDs, UFDs, UDDs,
Design Basis and Operating of oil and gas refinery units, etc.
 Review vendor and construction drawings.
 Cooperation with other disciplines on project executions.
 Preparing and providing documents such as procedures, official letters, minutes of
meeting, etc. (in English or Persian).
 Analyze multirate Welltest data by PROSPER
 Well Completion Designing, Planning and Supervision.
 Production workover Planning and Supervision.
PROFESSIONAL EXPERIENCE
Company: CNPC International Ltd. (Iran),
South Azadegan Project, Iran
June 2012 – Present
Position(s):
“Well operation and Testing Superintendent” since June 2012.
Promoted to “Production Department Coordinator” since March 2013.
Achievements:
Downstream Field:
 Flow orifice design (borehole, thickness and calculations for Bernouli equation) and
implement an accurate metering system.
 Surface facilities Management.
Issuing Operational Manual.
Supervising on surface facilities (production unit) operations.

2. Mohsen Maddahi • +989133453513• Mohsen.maddahi@yahoo.com
Petroleum engineer
AIT university
Page 2
Upstream Field:
 Execute rig-less operations (Slick line and Coiled tubing) for Acidizing, Nitrogen
lifting, Diesel lifting, perforation and etc.
 Execute work over rig operations.
 Planning and Implementation of Well tests
Responsibilities:
 Well acidizing, chemical injection, wellbore washing and perforation design and
supervision
 Daily production monitoring, optimization and candidate well selection for
treatment
 Production data analysis, forecasts, well test design and interpretation
 Well performance analysis, well completion evaluation and modification
 Troubleshooting planning, and preparation and supervision of workover programs
 Preparation and supervision of rigless (slickline and coiled tubing) well intervention
operations
 Preparation of contracts (technical documents, contract strategy, evaluation,
tendering, etc.)
 Operations risk analysis and conducting kick off meetings
 Supervise operations to kill the well by bull heading. Perform Well injectivity test
Company: Oil Industries Commissioning & Operation Company (OICO) Co.
SIRI NGL Gas Recovery Plant ,SIRI Island, Iran,
June 2010 – June 2012
Position(s):
Process supervisor
Vendor technical assistant
Achievements:
 Pre-commissioning, Commissioning and NGL plant startup including: commissioning
and startup of Feed gas Compressors, Gas turbine Generators.
 Commissioning and operation of Distribution Control System (DCS)
 Troubleshooting of process design issues and implement the alternatives.
Responsibilities:
 Engineering concerns of plant design for modifying designs and solve operation
problems.

3. Mohsen Maddahi • +989133453513• Mohsen.maddahi@yahoo.com
Petroleum engineer
AIT university
Page 3
 Preparing Operational Test Procedures (OTP) and implementation
 Following electrical team of Technical office during re-commissioning and
commissioning tasks of electrical issues.
 Pre-commissioning and commissioning tasks of Instrument issues.
 Pre-commissioning and commissioning tasks of Mechanical issues
 startup of complicated (unman control system) and huge Mechanical system of the
Compressors (centrifugal types and reciprocating types) and cooperating with
specialist of the vendor representatives.
 Startup of Screw types compressors of air and nitrogen.
Company: Oil Industries Engineering & Construction Company (OIEC) Co.
South Pars Gas Complex phases 9&10 , Assaluyeh, Iran
October 2008 – May 2010
Position(s): Process supervisor in Engineering Division of pre-commissioning, commissioning
and start up department, operation and handover team.
Achievements:
 Pre-commissioning, Commissioning and startup including: LPG fractionation and
treatment units
 Filling the C3 and C4 storage units and export the products.
 Troubleshooting of refrigerant compressor functional logic programs, plant design
issues and implement the alternatives for operation.
Responsibilities:
 To prepare procedures and supervising on Pre-commissioning and commissioning
Leak tests and indicate separated packages on marked up P&IDs in Propane and
Butane Treatment & Drying Units
 To prepare procedures and supervising on pipelines flushing operations and indicate
separated packages on marked up P&IDs in Propane and Butane Treatment & Drying
Units
 To prepare procedure and supervising on loading and filling chemicals(reactors and
filter vessels) according to vendor documents
 Prepare and performing Operational Test Procedures (OTP)
 Preparing Startup operation document using previous experiences, FEED and vendor
documents.
 Prepare documents for Amine filtration package in unit 116 (Sequence test, Precoat
test and start up) and supervision on the performed actions. (60 step Automatic
sequence for three filtration packages in absence of “Amma Filter Group” as its
vendor).
 Prepare documents for startup of Propane and Butane cryogenic storages (Dry out ,
Cooling, LPG flare system)

4. Mohsen Maddahi • +989133453513• Mohsen.maddahi@yahoo.com
Petroleum engineer
AIT university
Page 4
 Preparing documents as startup procedure for Ethane Regeneration Gas
Compressor 116-K-101 A/B
 Preparing documents as startup procedure for Refrigeration Compressor 147-K-101
A/B, and finding optimum operating point through performance curves.
 Cooperation for performance test and prepare the handover documents for plant
performance test.
Company: ENI Iran B.V. Co..
South PARS Gas Complex phases 4&5 , Assaluyeh, Iran
October 2006 – June 2008
Petroleum Engineer in Engineering Division of Operation & Production Department
Achievements:
 Commissioning and startup, performance test and handover.
 Products: 50 MMSCF/D Sweet Gas (C1), 2000 Metric ton treated liquid Propane per
day, 2000 Metric ton treated liquid Butane per day and 40000 Bbl. Condensate per
day.
Responsibilities:
 Operation supervision in field and Central control Room (CCR)
 Retrieving the process history in case of shut down event at any level (total plant
shutdown, unit or equipment shutdown) for finding and solving the causes of
shutdown.
 Offer advices for changing type of Dryer beds in Dehydration units that finally was
ended to prepare a new process line for regeneration gas outlet to regenerate Dryer
beds.
 Solving Hydrate Formation problem in Letdown station in Reception Units by
simulate Hydrate formation temperature at desired pressure.
 Offer advices and prepare required documents for Cold box cleaning during annual
shut down.
 Plant routine check by preparing data sheets for the plant especially following units:
 reception facilities, Gas sweetening, dehydration units, LPG Fractionation and
treatment, export & storages units, propane refrigeration cycle units, Boilers, GTG’s
and also compressors in export gas unit.
 Monitoring the specification of all plant products (condensate, LPG, Sulfur, Ethane,
Sales Gas)

5. Mohsen Maddahi • +989133453513• Mohsen.maddahi@yahoo.com
Petroleum engineer
AIT university
Page 5
EDUCATION
2000–2005 Petroleum University of Technology, Ahvaz, Iran
B.Sc. in PetroleumEngineering – Reservoir Engineering
B.Sc. Project: Laboratory Resistivity Measurement for Detection of Petrophysical Parameters of
Reservoir Formation
SKILLS
FOREIGN LANGUAGE
 Excellent in comprehension good in speaking and writing English.
Technical
 PROSPER
 HYSYS (Steady State simulation)
 PIPESIM
Common
 Fully Experienced with Microsoft Office
LIST OF CERTIFICATES
 Perfect employee as “offshore /onshore Process engineer” for ENI Co.
 Appreciation letter for teaching junior engineers in “Process engineers training Course”
for OICO Co.
 Perfect employee as “Well operation and testing superintendent” for CNPCI Production
Department
 Perfect employee as “Petroleum engineer” for CNPCI Production Department
 One year Excellent staff certificate for Azadegan project Oil Field from CNPCI
REFERENCES
References and Certificates are available upon request.