The birth of today’s oil and gas industry can be traced back to a Persian city named Baku, in what is now called Azerbaijan, where crude oil seeped from the ground and shallow pits of up to 35m were dug by hand as early as the mid 1590s, to collect oil for commercial distribution.
It was Russia that drilled the first wells there in 1848 and installed the first pipelines, to transport crude oil from the Caspian to the black sea and also from Chechnya to the Caspian. At the turn of the 20th century, Russia dominated the world’s markets with half the total production.
In the US, oil recovery began in Pennsylvania at a place aptly named Oil Creek in the early 1800s, by constructing dams to float it to the surface. Drilling for oil was first successful in 1859 at Titusville in Pennsylvania and by 1925 the US had overtaken Russia’s oil production.
By this time oil fields had been established in many other countries including Canada, Poland, Sweden, the Ukraine and Venezuela.
As something of an introduction to this industry, let’s see how it can be defined. A report published on 20th November 2008, on gives the following definition of the Oil & Gas Industry:
“This industry consists of firms that operate and/or develop oil and gas fields and firms that extract liquid hydrocarbons from oil and gas field gases. The activities firms engage in may include: exploration for crude petroleum and natural gas; drilling, completing, and equipping wells; operating separators, emulsion breakers, de-silting equipment, and field gathering lines for crude petroleum; and all other activities required for the preparation of oil and gas up to the point of shipment from the producing property. In addition to the recovery of crude petroleum, this industry engages in the mining and extraction of oil from oil shale and oil sands, the production of natural gas and the recovery of hydrocarbon liquids from oil and gas field gases. Firms may operate oil and gas wells on their own account or for others on a contract or fee basis.”

Status & structure
According to Deloitte Petroleum Services Group, over the past 24 months, the oil and gas industry has experienced the best macro-environment in more than 20 years. Global demand for crude oil and natural gas is strong; interest rates and cost inflation are low; and, hydrocarbon prices are said to be at historic highs.
As a result the group adds, large integrated oil companies and those operating in related sectors are experiencing record profitability and cash flows. After years of cautious investment to find new oil and gas reserves, companies finally are increasing their efforts in exploration and development.
Despite this outline of positive conditions, the fact remains that the oil & gas business has reached its declining phase with fewer new reserves reported, in difficult and expensive to exploit locations and increasingly ‘sour’ crude oil being produced. Since the market price for oil dipped below $50 recently, the heydays of the past five year long surge peaking at almost $150 per barrel appear to be over, for now at least.
This level of extreme volatility wreaks havoc in an industry that depends heavily on exploration and investment to maintain output capacity in line with demand trends.
In terms of structure, the American Petroleum Institute divides the industry into the following five sectors:
1. Upstream activities including exploration, development and production of crude oil or natural gas.

2. Downstream activities that include processing, storage, refining, transport (excluding tankers and pipelines), marketing, retailing and consumption of products derived from crude oil, including natural gas and natural gas liquids, liquefied petroleum gas (LPG) petroleum coke. The downstream industry touches consumers through thousands of products such as petrol, diesel, jet fuel, heating oil, asphalt, lubricants, synthetic rubber, plastics, fertilisers, antifreeze, pesticides and pharmaceuticals.

3. Pipeline operations transport crude oil from wells on land and platforms in the oceans to refineries, and then to terminals where fuels are released to retail outlets.
4. Marine operations involve all aspects of transporting petroleum and petroleum products by water, including port operations, maritime fire-fighting and oil spill response. Oil tankers make up a major portion of this segment.

5. Service and supply forms an integral part of the oil and natural gas industry, these companies provide equipment, services, supplies, and design and engineering support for exploration, drilling, refining and other operations. Many are local firms, while others are global manufacturers selling products for operations around the world.

Operations within these five sectors are then executed by five types of companies.
Operating companies hold the exploration and production licences and operate the production facilities. Some of these are household names, but others are less well known, while almost all are international companies working in many different parts of the world. Drilling companies are contracted to undertake the drilling work, and often operate and maintain their own mobile drilling rigs. Like the operating companies, they tend to work globally.
Major contractors provide integrated operations and maintenance services to the operating companies. On some installations they employ almost all the regular offshore personnel (the ‘core crew’). Some of these contractors are huge international companies, while others are small by comparison. FPSO operators operate and maintain floating production storage and offloading (FPSO) units. These look like ships, but are designed to remain on station for months or even years on end, and are packed with equipment for processing oil and gas.
Service companies provide specialist assistance to both operating and drilling companies, for example well service firms, drilling mud suppliers, cementing companies, well testing specialists, seismic firms, divers, and caterers among others.

Oilfield Services Companies
Two US companies perhaps represent the industry leaders offering the full spectrum of oilfield services across the globe. These take the form of Schlumberger Limited and Halliburton.
Schlumberger Limited is thought to be the world’s leading oilfield services company, supplying technology, information solutions and integrated project management that optimise reservoir performance for customers working in the oil and gas industry.
Founded in 1926, today the company employs more than 84,000 people of over 140 nationalities working in approximately 80 countries. The company comprises two business segments.
Schlumberger Oilfield Services supplies a wide range of products and services from formation evaluation through directional drilling, well cementing and stimulation, well completions and productivity to consulting, software, information management and IT infrastructure services that support core industry operational processes.
WesternGeco meanwhile, is the world’s largest seismic company and provides advanced acquisition and data processing services.
Halliburton, founded in 1919, is one of the world’s largest providers of products and services to the energy industry. With over 55,000 employees in approximately 70 countries, the company serves the upstream oil and gas industry throughout the life cycle of the reservoir – from locating hydrocarbons and managing geological data, to drilling and formation evaluation, well construction and completion, and optimising production through the life of the field.
Halliburton consists of two divisions, notably Drilling and Evaluation and Completion and Production.

Drilling and Evaluation
The Halliburton Drilling and Evaluation division offers proven expertise and processes coupled with best-of-breed software and hardware solutions to help visualise and simulate well activity, while its drilling tools, logging, and perforating technology ensures optimal placement and production of the well.

Completion and Production
Completion and Production delivers cementing, stimulation, intervention, and completion services. This segment consists of production enhancement services, completion tools and services, and cementing services.
Production Enhancement Services include stimulation services, pipeline process services, sand control services, and well intervention services. Stimulation services optimise oil and gas reservoir production through a variety of pressure pumping services, nitrogen services, and chemical processes, commonly known as hydraulic fracturing and acidising.
As is typical of all companies in this sector and not just Halliburton, pipeline process services include pipeline and facility testing, commissioning, and cleaning via pressure pumping, chemical systems, specialty equipment, and nitrogen, which are provided to the midstream and downstream sectors of the energy business.
Sand control services include fluid and chemical systems and pumping services for the prevention
of formation sand production. Well intervention services enable live well intervention and continuous pipe deployment capabilities through the use of hydraulic work-over systems and coiled tubing tools and services.