Drilling and Logging Techniques Quiz

Well Logging and Interpretation

• This is a course about well logging and interpretation, covering various aspects of the process, from introduction to specifics like drilling phases and bit sizes.
• The course is presented as a slide deck, with sections on course content, introduction, geophysics principles, and more.
• The course includes the principle of seismic reflexion, showing land and offshore acquisition methods.
• Examples of seismic sections are presented, highlighting geological layers (Tertiary, Cretaceous, Jurassic, Triassic) and potential hydrocarbon reservoir zones.
• Various drilling phases and bit sizes are detailed in a table, crucial for understanding the drilling process.
• Different logging techniques (mud logging, wireline logging, MWD & LWD) are discussed; each logging method has a different purpose. Mud logging monitors geological conditions and well behaviour throughout the entire drilling process, using rig sensors or physical cutting analysis.
• Introduction and details of well logging operations are included, along with the principles and categories of well logging.
• The principle of wireline logging, where physical parameters (electrical, acoustic, nuclear) are measured periodically during drilling halts and after pulling the drill pipe.
• Measurement While Drilling (MWD) and Logging While Drilling (LWD) are presented and differentiated, emphasizing their use in deviated and horizontal wells.
• Mud logging's definition, purpose, and components (i.e., drilling, operational, and geological parameters) are elaborated. Specific diagrams illustrate the equipment and process.
• Well logging, wireline logging, MWD and LWD have specific measurement types.
• Course contents outline introduction to wireline logging, main logging tools, determination of Rw, lithology and porosity determination, formation evaluation of shaly formations, and other logging tools (e.g., NML, dipmeter, formation testing).
• Comprehensive information on logging while drilling (MWD/LWD), detailing its principles, categories, and usage in highly deviated and horizontal wells.
• The details and importance of all major logging tools are discussed and illustrated, such as diamond core bits, core barrel, core box, and core plug.
• Core sampling techniques (e.g., CST) and their benefits and limitations are also part of the curriculum.
• Wireline logging introduction with the history is discussed, mentioning the Schlumberger brothers' first resistivity measurement at the Pechelbronn field in France in 1927.
• The need for precise reservoir analysis techniques to reduce risk and optimize oil field development is highlighted as a key driving force in logging technology.
• A log is a graphic representation of parameter variations as a function of depth in detail.
• The standard depth scales of wells are explained, showing different scales (1/1000, 1/500, 1/200), suitable for various geological interpretations.
• Detailed exploration of well logging operations, illustrating various diagrams (e.g., a schematic well profile for mud logging, a diagram illustrating the principle of CST operation.).
• The presentation covers the principles of well-logging operations, types of logs (e.g., resistivity logs), objectives, depth and measurement factors.
• The characteristics and functionality of the rig are clarified, showing how it's used for the well logging task.
• Comprehensive explanations of geological logs and interpretation.
• Comprehensive details covering different aspects of well logging.
• Definition and examples of log interpretations.
• Analysis of reservoir and gas properties, including reservoir characteristics, and a definition of critical points/zones.
• Discussion of reservoir and gas properties, including definitions and descriptions of bubble point pressure and gas solubility.
• Qualitative and quantitative interpretations of logs are explained.
• The principles and characteristics of different log measurements (e.g., SP, gamma ray, neutron).
• The functionality of different logging tools is explored (e.g., various caliper types, formation micro-imager, and others). More details and illustrations are included to help understand the tools and their application.
• Exploration and calculation of water saturation using Archie's formula.
• Exploration of porosity and permeability.
• Different techniques for determining water saturation (Sw) in different situations.
• Various log interpretation techniques are highlighted (e.g., crossplots, overlays).

Other topics

• Drilling Fluids
• Definition of Porosity
• Definition of Permeability
• Determination of Rw
• Qualitative and Quantitative log interpretation
• Reservoir Evaluation logging
• Well Seismic
• MWD-LWD
• Coring