Geologist
The geologist will use the seismic data to reconstruct the subsurface configuration to locate possible sites of oil traps. As the oil is found within porous rock they will also calculate the percentage of oil that could possibly be extracted from the reservoir. The geologist will work closely with the geophysicist.
Geophysicist
The geophysicist will interpret the seismic data and build up the picture of the subsurface by using his or her knowledge of the past changes in the earth's structure. The geophysicist will work closely with the geologist.
Mud Logger
The mud logger, usually a geologist, will inspect and test the drilling fluid, 'mud' and the debris from the well. They will be looking for traces of oil and the different types of rock samples from the well to build up a picture of the subsurface.
Reservoir Engineer
The reservoir engineer will decide from the size and shape of the reservoir, the most appropriate locations for the production wells to be drilled to get optimum recovery of the oil and gas.
Mud Logger
The mud logger, usually a geologist, will inspect and test the drilling fluid, 'mud' and the debris from the well. They will be looking for traces of oil and the different types of rock samples from the well to build up a picture of the subsurface.
Reservoir Engineer
The reservoir engineer will decide from the size and shape of the reservoir, the most appropriate locations for the production wells to be drilled to get optimum recovery of the oil and gas.
Roustabout
This role is generally unskilled manual laboring. The roustabout helps with the drilling activities and maintenance of the drilling area.
RoughnecklFloorman
More skilled than the roustabout, the roughneck/floorman is directly involved in the drilling process under the supervision of the assistant driller. This position involves hard physical work.
Derrickman
Working about 90 feet above the floor of the rig in the 'derrick' (the distinctive high tower), the derrickman handles the section of drill pipe under the direction of the assistant driller.
Assistant Driller
The assistant driller co-ordinates the activities on the drill floor, reports to the driller and communicates instructions and information from the driller to those working on the drilling.
Driller
The driller is responsible for the drilling team and controlling the rate and continuity of the drilling. This is highly skilled as the drill may have to penetrate many different types of rock.
Toolpusher
The toolpusher oversees the drilling operations at night. He also ensures that the necessary equipment and materials are available.
Rig Superintendent
The rig superintendent has overall responsibility for the drilling operation.
Drilling Engineer
The drilling engineer specifies the drilling program, what kind of 'mud' should be used and the
casing required for the well.
The installations used in the process of extracting oil and gas, whether fixed operating platforms, mobile drilling rigs, or the modern floating production storage and offloading vessels, all require a variety of personnel whose role is to manage and maintain the day to day operations of offshore life. Being cut off from land, sometimes by hundreds of miles of sea, an oil installation is more than just a workplace. Many roles in the offshore environment are concerned with living conditions rather than direct oil production. Given the proximity of colleagues on the installation, good team-based working practices are essential.
Offshore Installation Manager
The Offshore Installation Manager, or OIM, has overall responsibility for the activities offshore. This position is sometimes compared to that of a ship's captain.
Radio Operator
The radio operator will control all movements of the helicopters, passengers and freight. He or she will also communicate with shipping in the area.
Crane Operator
Responsible for the loading and offloading of cargo, the crane operator works high above the sea and the movements of the vessels means that the work calls for a high degree of accuracy.
Chef
The chef will provide the crew with a variety of meals from breakfasts at 5 am until late suppers at 1 am.
Steward
The stewards ensure that the cabins and all the accommodations of the installation are cleaned and maintained.
Divers
The divers inspect and maintain the subsea structures. Technological advances mean that remotely operated equipment is being used more and more.
Medics
The medic will deal with the day to day well-being of all the offshore personnel.
Storeman
The storeman is responsible for ordering all the necessary equipment and supplies for the operation of the installation.