N003 Geological Interpretation of Well Logs
N003 Geological Interpretation of Well Logs
*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 course is an introduction to the principles and qualitative applications of conventional well logs. It shows how combinations of logs, preferably supported by other well derived data, can be used to interpret mineralogy, lithology, facies, depositional environments and important events such as flooding surfaces. The ultimate objective is to be able to use sets of well logs to establish robust correlation schemes that can be used to guide well placement and geological modelling.
This is a five-day classroom course. It uses a combination of lectures and self contained exercises based on real data sets. Lectures start by considering the individual measurements but as the week progresses there is an increasing emphasis on combinations of measurements and the trends with depth. The climax of the course is an exercise to produce a robust correlation scheme using data from three wells. The correlation scheme is then used to choose the location for a fourth well designed to intersect the best developed reservoir. Participants get a complete set of lecture notes and a copy of the text book “Geological Interpretation of Well Logs” by Malcolm Rider.
Participants will learn how to:
1. Differentiate the functions, physical principles and limitations of logging tools used in a standard logging suite and their applications for geological interpretation.
2. Demonstrate the differences between logs acquired using wireline conveyance and logs acquired whilst drilling.
3. Use well logs to determine lithologies and interpret facies, stratigraphic and structural features.
4. Determine shale volume, porosity and water saturation from well logs.
5. Correlate between wells using well logs, integrating other available down-hole data.
6. Analyse well logs and cores, together with other available data, to produce a coherent geological evaluation.
7. Employ dipmeter and borehole imaging tools and analyse their interpretation patterns to indicate structural and stratigraphic features.
In this class, each individual logging tool is described in terms of basic functions, physical principles and geological interpretation. Log data is then used as a complementary set for lithology interpretation, facies recognition, log sequence analysis and correlation. The following timetable is only a guide and can vary depending on the tutor and experience level of the class.
This course best suits those beginning to acquaint themselves with logs or those who do not use logs all the time and need a refresher. The course is aimed primarily at inexperienced Geologists and Geophysicists, whether in exploration or exploitation, but is also good for Technologists, Petroleum Engineers and new-hire Petrophysicists.
The N003 class is considered essential for all geoscientists to attend, due to its nature and direct relevance to all key aspects of the Oil and Gas industry. There are no formal prerequisites for the class, however for non-geoscientists it will be advantageous, but not essential, to have a basic knowledge of Geology and Petroleum Systems. It may be advantageous, but not essential, to have a basic knowledge of well logs.
For an entry-level petrophysics class, see N083 (Introduction to Petrophysics and Reservoir Evaluation) and for a more petrophysical view of the interpretation of well logs, see course N121.
Larry joined the petroleum industry in 1975, and worked initially as an exploration and development geologist at various locations in Oklahoma and Colorado. In 1978 he began working in petrophysics, transferred to Singapore, and worked as the Southeast Asia regional petrophysicist for Phillips Petroleum Company. In that position he was responsible for petrophysical evaluations of Phillips’s exploration and development activities in Australia, China, Indonesia, Malaysia, Thailand, and the Philippines. He subsequently spent most of his career in a variety of technical divisions working on Phillips’s and then ConocoPhillips’ international E&P projects while based in Houston or Oklahoma with occasional long term assignments to places such as Norway and Qatar. In the course of these projects he has worked a wide variety of geological formation types, ranging from shaly sands and tight gas sands to carbonates and evaporites.
Larry also began teaching petrophysical training courses in 1978 and became one of the primary lecturers for internal courses in petrophysics, both domestically and internationally. In 1983, he took on the primary responsibility for developing internal training manuals, materials, and lecture presentations and coordinating new-hire training sessions for petrophysics.
At various times in the following thirty-five years he has taken post graduate courses in sedimentary geology, geophysics, and reservoir engineering, but his best education has always come through project work.
Affiliations and Accreditation
N003: Geological Interpretation of Well Logs
N649: Introduction to Log Analysis
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