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1. Introduction to
Oil & Gas Industry

2. • Introduction to Oil and Gas industry
consists of the following sections:
– 1. Oil formation and Historical perspective
– 2. Upstream & Downstream
– 3. Life cycle of oil field

3. Oil Formation
Oil was formed from the remains of animals and plants that lived
millions of years ago in a marine (water) environment before the
dinosaurs. Over the years, the remains were covered by layers of
mud. Heat and pressure from these layers helped the remains turn
into what we today call crude oil . The word "petroleum" means "rock
oil" or "oil from the earth."

4. Scientific definition:
Oil and Gas are called Hydrocarbons because they
are compound of atoms of hydrogen and carbon.
Methane (gas) – the simplest hydrocarbon
with one carbon atom and four hydrogen
atoms; is written as CH4.
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5. World Oil Reserves Chart
By country, proved reserves at the end of 2009

6. Historical Perspective
• The use of oil based products were recorded in the
earliest writing of man:
– Bitumen was used in the building of the tower of Babel
– Sumerians used it for paving the Hanging Gardens of Babylon
– In India, Burma pitch was used for buildings and as fuel for lamp
– In North America native Indians had been collecting oil for use
as a medicine

7. Modern oil history started in:
– 1848 the first well was drilled in Baku,
Azerbaijan at Bibi-Eybat place
– 1859 “Colonel” Drake successfully drilled the well
at a depth of 69 feet in Titusville, Pennsylvania.
– Around the same time, successful drilling
for oil was also taking place in Canada and Trinidad.
Oklahoma, 1930,
Wild Mary & Sudik
farm
Baku, 1890, oil wells in
Sabuntchi field

8. This slide shows some of the product that we use in our everyday life and
that are the result of refining process which is one of the main stages of the
Downstream phase

9. 2. Upstream and Downstream side of oil
industry
The oil industry is divided into two major sectors. The sectors are defined to
categorize the operations within each.
(1) Upstream: Exploration & Production or E&P. Involves
operations in searching for underground or underwater oil and gas fields
and drilling exploratory wells and at the same time, operating the
wells that recover to re-direct the crude oil or raw natural gas to the
surface.

10. Work, involved in both industry sectors, comprises not only of the oil field
jobs but also jobs within office environment.
Oil traders
(Downstream jobs)
Reservoir Engineers and Geoscientists
(Upstream jobs)

11. BP HQ Mayfair,
London Suncor Energy HQ,
Alberta, Canada
LukOil HQ, Moscow
Global Headquarters of Oil Companies

12. What is Downstream?
• (2) Downstream: Includes operations that processes
and stores, markets and transports crude oil, natural gas
liquids like ethane, butane and propane.
The downstream sector includes:
–all oils refineries and petrochemical plants,
–petroleum product distribution via the affiliated retail outlets
–and natural gas distribution companies, within the operations.
The downstream industry markets products such as petrol and
diesel and jet fuel, asphalt, lubricants, plastics fertilizers,
antifreeze and even pharmaceuticals and cosmetics.

13. Oil refineries are key to obtaining hydrocarbons. Oil in different parts of
the world contains different proportions of the various hydrocarbons.
There are refineries in many parts of the UK including Edinburgh,
Liverpool and Milford Haven. North Sea oil is relatively high in naphtha,
which is used for making plastics.

14. Refining process
Oil
Refinery
Residual
Fuel Oil
Gasoil/ Diesel
Jet/Kerosene
Naphtha
Gasoline
LPG
Refinery Gases
Fuel/Energy
Crude
Oil
NGLs
Other
Feedstocks
(Naphtha,
Residues,
Blending
Components)
Fuel/Energy

15. 3.Life cycle of processing of oil field consists
of 5 stages:
– Exploration
– Appraisal
– Development
– Production
– Abandonment
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Year
Revenue
Revenue
EXPLORATION
APPRAISAL
DEVELOPMENT
PRODUCTION
ABANDONMENT

17. • Exploration is about finding oil and gas fields. Main goal is to identify and
deliver commercially viable field development opportunities. The following
geological and geophysical (G&G) activities would take place:
– Conduct seismic surveys
– Process and interpret the seismic data and map the potential reservoir
– select exploration well locations
– drill and evaluate exploration well data:
– core analysis to establish porosity and permeability
– logging data to determine porosity, water and hydrocarbon saturation
– production test data to determine flow rates and maximum production
potential
– PVT to allow reservoir fluid analysis and ascertain oil/gas quality and
the shrinkage or expansion factor
– build a computer model of the reservoir and identify and where possible
remove major uncertainties by further data analysis, seismic reprocessing etc

18. Exploration phase of life cycle closely intertwines with the next stage of
processing which is Appraisal. The objective of Appraisal is to obtain
information about the reservoir in order to make a decision whether or not to
proceed with development of the field. This stage comprises of the following
activities:
– planning and execution of a data acquisition programme of additional
seismic,
– reprocessing existing seismic data to obtain enhanced results and the
drilling of
– appraisal wells
– evaluation of the results from the seismic and appraisal drilling activities
– using the information from the seismic and drilling programmes to update
the computer reservoir simulation models
– conduct initial conceptual field development planning and an environmental
impact assessment (EIA) study of these conceptual plans

19. Development stage
The initial phase of field development planning could involve the
assessment of more than one development option. Four components
of a development plan can be used to describe each option:
1. Reservoir: number, location, type of wells; assessment of oil
recovery mechanism; assessment of production over the
development stage
2. Wells: the design of wells to meet production requirements
3. Facilities: process facilities, infrastructure, terminal/export facilities
4. Operating and Maintenance strategies: manning level, daily
production level, support requirements, for ex. helicopters, supply
vessels

20. Production phase is targeted at bringing the well fluids to the
surface and preparing them for use in refinery or processing plant. All
production and maintenance activities would be carried out to meet
strict safety and environmental policies and procedures. The main
activities consist of the following:
– regulate production and injection to meet approved plans for the
quantity and quality of product.
– monitor and record all information to manage the reservoir, wells and
facilities.
– This could lead to further reservoir development or modifications to the
facilities
– plan and schedule all production and maintenance activities to minimise
production deferment and operating costs
– carry out maintenance to safeguard the technical integrity of all wells
and facilities and ensure their availability over the life of the field.

21. Oil Production
ONSHORE OFFSHORE

22. • Offshore Drilling Platforms - 1

23. • Offshore Drilling Platforms - 2

24. Decommissioning/Abandonment phase
The end of the life of the field is when it is no longer economic for the
operator to continue production, i.e. when the operating costs exceed the
revenue from the sale of production. It is common around the world that
operator might abandon the field prior to its depletion as a result of sale to
other interested party. Such acquisition takes place between the super
major operating company and independent oil company when production
declines to the level not commercially attractive to the super-major.
It is becoming increasingly common around the world that offshore facilities
must be dismantled and removed and the site restored to its original
condition. The major activities during the decommissioning phase are:
– plug and abandon wells by putting cement plugs into the wells at
various depths and remove the well-head and casing to a depth of
about 2 metres below the surface or seabed
– dismantle and remove the jacket and all facilities from the site,
ensuring that there is no contamination of the environment from
any oil or waste material remaining in the process facilities
– restore the site to its original condition
– conduct a final environmental impact study

25. APPENDIX
Complementary slides to enhance general overview about oil and gas industry
http://www.eia.doe.gov/energy_in_brief/world_oil_market.cfm#

26. • Typical oil well
being produced by
a pumpjack

27. http://videos.howstuffworks.com/hsw/8330-chemistry-at-work-drilling-for-oil-
video.htm
http://science.howstuffworks.com/offshore-drilling.htm/printable

28. Floating Production Storage and Offloading Vessel is a floating vessel used by
the offshore industry for the processing and storage of oil and gas.
The FPSO vessel is designed to receive oil or gas produced from nearby
platforms or templates, process it, and store it until the oil or gas can be offloaded
onto a tanker or transported through a pipeline.

29. FPSO - 2

30. ‘Galaxy’ Jack Up Rig at Peterhead
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31. • Production Phases
Time
Productionrate
Decline phasePlateau
phase
Development
phase
Primary
recovery
Secondary
recovery
Tertiary recovery

32. • Drilling Costs in US (000$/well)
100
1,000
10,000
100,000
1980
1985
1990
1995
2000
2005
(000$/well)
Onshore
Offshore

33. PEAK OIL

34. Actual Production Profiles of North Sea old fields