Using the information received from the survey phase, exploratory
wells will be drilled at the potential oil and gas field. As the
well is drilled, fluid, known as 'mud' (which helps to lubricate
and cool the drill bit) also brings back to the surface the 'cuttings'
from the hole. These cuttings are analysed to give further information
on the types of rock below the surface and any signs of oil. Once
the hole has been drilled and before it is cased and cemented, measuring
devices are lowered down to produce a wireline log which will provide
more information of the rock types and formation. All this information
is building up a picture of the dimensions of the field. At this
stage, using all the data that has so far been gathered, decisions
will be made on whether to develop the field and where the most
appropriate locations will be for drilling the production wells.
Once the wells have been drilled and completed they will be capped
ready for production.
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.
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.
Petroleum and Reservoir Engineering jobs
Logging and Drilling Fluid Engineering jobs
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