N121 Modern Petrophysical Well Log Interpretation
N121 Modern Petrophysical Well Log Interpretation
*Seats are currently available for NTA members only - non members will be advised as seats become available, based on the order they applied to the waitlist.
This multi-disciplinary course presents the principles and methods associated with the petrophysical interpretation of open- and cased-hole wireline and LWD well logs. The course will assist engineers and geoscientists in maximizing the application of existing log data, as well as providing them with insight into additional technologies available. A good understanding of the benefits, and limitations, of the various tools available will assist in ensuring that a cost-effective and fit for purpose data acquisition program is designed.
Topics covered include the use of log data to determine porosity, mineralogy, hydrocarbon saturation and lithology, as well as interpretation of facies, stratigraphic and structural features, and the measurements essential for optimizing production such as; fluid movement monitoring, cement-bond quality, and a discussion of "best-practice" perforation issues.
A five-day classroom course in modular format. Lectures on each topic are supported and illustrated by exercises, and participants build their own interpretations of at least two sets of wireline logs, and are expected to complete several "homework" exercises including a simple interpretation of a third set of (LWD) logs. Computers are provided, but participants should bring scientific calculators with them. This is a challenging course which covers a great deal of ground in only 5 days.
Participants will learn:
(a) For Log Quality Control, to:
(b) For Open-Hole Measurements, to:
(c) For Cased-Hole Measurements, to:
(d). For Advanced Topics (time permitting), to:
This course presentation is modular and covers the topics listed below, using many generic examples for the participants to work on themselves as each topic is covered. Participants develop their own interpretation of at least one set of logs as the course progresses, and (part of) the last day is taken by working on another set. If possible, the latter example will be chosen from an area relevant to the course location.
The course concentrates specifically on the petrophysical side of the interpretation of well logs. Although focused mainly on wireline measurements, equivalent LWD measurements are also covered, remarking upon the differences and their advantages/disadvantages, with examples. The range of measurements discussed is comprehensive, so participants are also presented with an up-to-date "shop window" of the wireline and LWD tools and techniques currently available to the industry.
Great emphasis is placed on the fact that log interpretation is still largely based on empirical relationships, the applicability of which may depend on local factors, and participants are constantly reminded that reliance on black-box interpretation methods can lead to serious mis-interpretations. Thus, the computers used on the course are largely there to enhance the speed of computation of the data points manually chosen by the participants, rather than for pushing un-screened log data through a pre-set interpretation package.
Day 1: Introduction, Resistivity Measurements
Day 2: Porosity and Mineralogy/Lithology Measurements
Day 3: Linking Resistivity with Porosity/Mineralogy Measurements
Day 4: NMR and Topics for Geological and Petroleum Engineering Applications
Day 5: Log Quality Control, Interpretation of Final Example
Topics of Special Request (if time permits):
Advanced Logging Measurements
Advanced Interpretation Overviews
At the beginning of days 2-5, the previous day’s activity and any overnight "homework" will be briefly reviewed.
The course is intended for entry-level geoscientists and engineers, as well as for more experienced staff and technical assistants needing a better understanding of the principles of log interpretation and/or to update themselves on the range of log measurements and techniques now available to them.
N121 has no formal prerequisite, although it may be advantageous to have a basic knowledge of well logs.
Further treatment of petrophysics topics, by the Nautilus Training Alliance, are offered in courses N030 (Rocks and Fluids, Practical Petrophysics), N054 (Intermediate Petrophysics for Conventional Reservoirs), N187 (Low Resistivity Low Contrast Pay), N267 (Petrophysics for Shale Gas Reservoirs), N314 (Advanced Petrophysics for Conventional Reservoirs) and N970 (Cased Hole Logging for Production Monitoring).
Kym Dutfield-Cooke is currently an independent consultant and provides wireline logging quality control services to oil companies operating in Africa and the Middle East; covering all aspects of the wireline operation including contract/tender negotiation, pre-mobilisation audits and wellsite data acquisition and quality control, as well as lecturing on well log interpretation and quality control. Prior to this, she worked for Baker Hughes in a range of roles starting as a Wireline Field Engineer before spending time at the corporate headquarters as a Technical Support Engineer and Product Manager before returning to operations as a Wireline Field Service Coordinator in Angola. During her time with Baker Hughes she worked in various countries worldwide including North America, Africa and the Middle East. Earlier in her career Kym also spent time working for a geological consulting firm, as well as a wireline logging equipment manufacturer, providing a wide range of knowledge and experience related to the Wireline Logging industry.
Affiliations and Accreditation
BSc Open University - Honours Degree Diplomas in Mathematics, Computing and Natural Sciences
N914: Log Analysis for Engineers
N121: Modern Petrophysical Well Log Interpretation
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