Today oil and gas is produced in almost every part of the world, from small 100
barrel a day small private wells, to large bore 4000 barrel a day wells; In shallow 20
meters deep reservoirs to 3000 meter deep wells in more than 2000 meters water
depth; In 10.000 dollar onshore wells to 10 billion dollar offshore developments.
Despite this range many parts of the process is quite similar in principle