My Internship Experience Summary

Nigeria Projects Organisation – Design Engineering Services

ExxonMobil Nigeria

Gbolahan DadaJanuary 2015

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OUTLINE

Safety Moment

Introduction

Work Experience

Technical presentation

Questions

Conclusion

General feedback

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INTRODUCTION

University of Lagos, Akoka

• BSc. Chemical Engineering (in view)

Internship Duration (6 months)

• Start Date: July 2014

• End Date: January 2015

Post-Internship

• Final year of my undergraduate program

• Student President of NSChE Unilag Charter (2015)

University of Lagos, Akoka

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My EXPERIENCE

• Trainings

• Oil and Gas Industry Overview

• Basic Facilities Engineering Knowledge

• Field Trips

• Process Safety Design

• Equipment Design

• Process Simulation and Modelling

• Others

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OIL & GAS INDUSTRY

OVERVIEW

• Upstream, Mid-stream and Downstream

• Hydrocarbon formation

• Reservoir discovery

• Exploration

• Field development

• Production and Extension of Field life

• Transportation

• Storage

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BASIC FACLITIES

ENGINEERING KNOWLEDGE

• Material and Heat balance

• Thermodynamics

• Physical properties of Hydrocarbons

• Phase behaviour

• Vapour-Liquid Equilibrium

• Water-Hydrocarbon Phase behaviour

• Reading PFDs and P&IDs

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Project Engagements

• Erha Calcium Nitrate Injection Project

• Erha North Phase II

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FIELD TRIPS

• Niger Dock Fabrication yard, Snake Island

• Chenotech Fabrication yard, Port Harcourt

At Niger Dock, I saw the fabrication of several

piping members and pressure vessels, welding and

machining of other process equipment parts. I also

witnessed some Quality tests being carried out – hydrotest,

and radiography.

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At Chenotech, I witnessed the fabrication and assembly of foam

makers for fire water safety systems

• Threading of carbon steel pipe with both manual and machining

methods

• Coating of Fire water lines

• Machining of curved pipes

• We also saw completely fabricated Pig traps and Fire water lines

We were allowed into their store, where we saw some process

devices such as various valves, gaskets, flow meter, flanges, etc.

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Operational Facility Visit

On UBIT GH (Wellhead platform),

• Test Separator

• Manifold

• Well heads (Christmas trees)

• PSV

• Level gauge

• Bleed rings for Chemical injection/Corrosion inhibition

I was able to follow the production flow line on the platform’s

main deck, from the Christmas tree (receives subsea pipelines bearing

produced crude) to the Manifold (combines the crude being produced

from the 9 Wellheads) to the Test separator (that separates the crude

into two phases- gas and liquid), and then both the gas line and the

liquid line from the test separator continue to the Main Production

platform (UBIT PP) as pipelines.

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Christmas trees

Wellhead conductors Piping around Test

Separator

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Operational Facility Visit

On UBIT GP, I saw the following

• Control room

• Production separators

• Gas Generators

• Compressors

• Pigging system

• Instrument hydraulic lines

• Flare header

• PCV

• PSV

• Flanges (spectacle blind, blind, weld neck)

• Level gauges

• Production manifold

Some observations

• No DCS in the control room

• No multiphase meter

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PROCESS SAFETY DESIGN

I studied API RP 14C, and performed Safety Analysis on

the following Process components

• Separators

• Pump

• Crude oil cooler

• Atmospheric tank

• Production flow line + Manifold

• Water injection line

• Compressor

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EQUIPMENT DESIGN

I studied API RP 14E and API 12J, and carried out Design

calculations for the following using MS Excel:

• A pump (ECNIP)

• A separator (ENP2)

• Water injection line (ENP2)

• Gas lift line (ENP2)

• Methanol injection line (ENP2)

• Production flow line (ENP2)

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PROCESS SIMULATION

I familiarized myself with Aspen HYSYS, and carried out

various simulations of;

• Condensate Separation Systems

• Dew point plant

• Refrigeration systems

• Corrosion inhibition models

Also attempted modelling of an Existing Production facility

(Erha FPSO)

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OGPT training example

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OPEX Analysis

Cost of Hydrate Inhibitors

MeOH = $1.10/lb and 80% EG = $3.10/lb

For continuous operation for 5 years

Methanol cost of 1431lb = $69 million

80% Ethyl Glycol cost of 4671lb = $634 million

Conclusion: Best choice is Methanol, because 80% EG is 9 times

more expensive.

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Questions?

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Appreciations

Design Engineering Services Manager – Okechukwu Opara

Project Manger – Soji Adekogbe

Facilities Supervisor(DES) – Emem Abraham

Mentor/DES Process Advisor – Syamsul Bahri

Buddies – Folu Babatunde; Tomi Osipitan; David Okuonrobo

Martin Mweemba; David Coym; Jos Ronde; Pat Maddigan and the entire DES team

ENP2 Lead Design Engineer – Helen Nabena

Others – Michael Ebiye, Perry Jas-Ikpeme, Dean Adatang, Edwin Okegbe,

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Thank you

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General

QUESTIONS & FEEDBACK