After completing this course, you will be able to: - Define clays and shales. - Describe how clays are classified...

Learning Objectives After completing this topic “Low Resistivity and Low Contrast Pay“, you will be able to: Summarize the causes of historical limitations of low resistivity and low contrast pay interpretation. Be conversant with the advances in well logging tools and interpretation. Categorize the mineralogical causes of low resistivity and …

Learning and Competence Level Objectives After completing this topic “Gamma Ray Logs”, you will be able to: Discuss the principles of natural gamma rays and gamma ray radiation. Summarize the interpretation applications of LWD and wireline gamma ray logs. Verify gamma ray log data acquisition for quality control and standard …

Underbalanced Drilling using Coiled Tubing Drilling Scenario An operator in the Michigan Basin of the United States desired to deepen a well producing from a Niagaran Reef carbonate reservoir. Conventional drilling techniques were not previously successful, because of the overpressure conditions present in this interval. The feasibility study performed by …

Coiled Tubing for Underbalanced Drilling Coiled tubing is ideally suited for drilling underbalanced. The continuous nature of the coiled tubing string and the exclusive use of a mud motor for drilling provides several advantages over conventional jointed pipe drilling for underbalanced applications: Drilling with a mud motor prevents the formation …

Snub Drilling Overview If very high formation pressures and uncontrollable loss of circulation are expected during underbalanced drilling, use of a snubbing or a coiled tubing (CT) unit may be necessary. This type of underbalanced drilling is known as snub drilling. Snub drilling should be considered for wells with: Very high …

Flow drilling was first developed for the Austin chalk reservoirs in Texas. Underbalanced conditions are created using

Gasified liquids, which are used for underbalanced drilling applications, generally do not contain surfactants. Bottomhole pressures are ...

Stiff Foam Drilling Overview Stiff foam is a more viscous and stable form of foam that can be generated using surfactants alone. The reduction in horsepower requirements and low water consumption make the stiff foam a more economical option compared to other drilling fluids. In general, stiff foam drilling involves …

Foam drilling is a drilling technique that involves the use of a polymer foaming agent, water, and compressed air. In certain areas, it’s more effective than mud drilling, and it generally results in more efficient spoil disposal. Trenchless operators have access to a variety of drilling techniques. Foam Drilling Overview …