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.

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.

Petroleum and Reservoir Engineering jobs
Logging and Drilling Fluid Engineering jobs