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Drilling

Ductile rocks respond during drilling

Drilling is a process whereby a hole is bored using a drill bit to create a well forĀ oilĀ andĀ natural gasĀ production. Ā There are various kinds ofĀ oilĀ wells with differentĀ functions:

  • Exploration wells (or wildcat wells) are drilled for exploration purposes in new areas. The location of the exploration well is determined by geologists.
  • Appraisal wells are those drilled to assess the characteristics of a proven petroleum reserve such as flow rate.
  • Development or production wells are drilled for the production ofĀ oil orĀ gasĀ in fields of proven economic and recoverableĀ oilĀ orĀ gas
  • Relief wells are drilled to stop the flow from a reservoirĀ when a production well has experienced a blowout.
  • An injection well is drilled to enable petroleum engineers to inject steam, carbon dioxide and other substances into anĀ oil producing unit so as to maintain reservoir pressure or to lower the viscosity of theĀ oil, allowingĀ it to flow into a nearby well.
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