Drilling
Drilling is a process whereby a hole is bored using a drill bit to create a well for oil and natural gas production. There are various kinds of oil wells with different 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 of oil or gas in fields of proven economic and recoverable oil or gas
- Relief wells are drilled to stop the flow from a reservoir 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 an oil producing unit so as to maintain reservoir pressure or to lower the viscosity of the oil, allowing it to flow into a nearby well.
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Cement Additives in Drilling
Learning Objectives After completing this topic “Cement Additives in Drilling“, you will be able to: List the key cement properties…
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Chemistry and Classification of Oil well Cements
Learning Objectives After completing this topic “Chemistry and Classification of Oil well Cements“, you will be able to: List API…
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Introduction to Well Cementing
After completing this topic "Well Cementing", you will be able to: - Describe the evolution of cementing methods and the…
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Case Studies Underbalanced Drilling
Underbalanced Drilling using Coiled Tubing Drilling Scenario An operator in the Michigan Basin of the United States desired to deepen…
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Underbalanced Drilling: General Issues
Coiled Tubing for Underbalanced Drilling Coiled tubing is ideally suited for drilling underbalanced. The continuous nature of the coiled tubing…
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Snub Drilling
Snub Drilling Overview If very high formation pressures and uncontrollable loss of circulation are expected during underbalanced drilling, use of…
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Flow Drilling
Flow drilling was first developed for the Austin chalk reservoirs in Texas. Underbalanced conditions are created using
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Gasified Liquids
Gasified liquids, which are used for underbalanced drilling applications, generally do not contain surfactants. Bottomhole pressures are ...
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Stiff Foam Drilling
Stiff Foam Drilling Overview Stiff foam is a more viscous and stable form of foam that can be generated using…
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Foam Drilling | What is Foam Drilling?
Foam drilling is a drilling technique that involves the use of a polymer foaming agent, water, and compressed air. In…
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