Top Seals and Fault Seals in Clastic and Carbonate Reservoirs: A Practical Approach
|Dr Dirk Nieuwland (NewTec International, Leiden, Netherlands)|
|Geology – Carbonate Geology|
|10 CPD points|
CASE STUDY CLAY DEFORMATION FAULTS MECHANICS MODELING SEDIMENT SEDIMENTOLOGY SHALE
The core of this course is a new powerful method of fault seal prediction and is intended for geologists, geophysicists and reservoir engineers in exploration. The course is based on geomechanics as a sound foundation for structural geological concepts and the behaviour of rocks in the brittle regime. Mechanical rock properties and ways and means to determine these properties form an important element of this course. Following an introduction to geomechanics, the theory of fracturing of brittle, ductile and viscous rocks is treated, illustrated with field examples and case histories. Different deformation mechanisms, based on mechanical rock properties, are treated in relation to realistic geological environments. Cataclasis is introduced as a major sealing mechanism, including a detailed account of the cataclasis process. Paleo-stress analysis is introduced, together with a new tool, the reactivation circle. The course is very practical and focused on application. An exercise based on real data forms an important element of the course. Cases requiring the use of numerical models are discussed but numerical modeling is not part of the course.
Upon completion of the course, participants will be able to:
- Recognize the most appropriate fault seal mechanism for an area of choice and perform a quantitative fault seal analysis. If necessary, perform a paleo-stress analysis as a basis for fault seal prediction;
- Assess top and fault seal integrity for subsurface processes including exploration, field development and subsurface storage of natural gas or CO2.
- Introduction to tectonic regimes and associated stress regimes.
- Analogue demonstration experiments.
- Fault seal case history.
- Fundamentals of geomechanics.
- Geomechanics exercise.
- Tectonic stress regime exercise.
- Case history (time permitting).
- Overview of known fault seal mechanisms.
- Clay smear method, with exercise.
- Shale gouge ratio method.
- Cataclasis as fault sealing mechanism.
- Palaeo stress analysis and fault seal prediction exercise.
The course is intended for geoscientists and subsurface engineers that deal with geological problems in relation to (potential) sealing problems with top seals and faults.
This course will enable participants to assess top seal and fault seal potentials; in exploration cases with limited data availability but also in field development situations, with detailed data available, e.g. in relation to gas injection and top and fault seal issues.
About the instructor
Dr Nieuwland has 34 years of experience as a geologist of which 30 years in oil and gas exploration and production. He has published numerous papers in this field and edited two books in the Special Publication series of the Geological Society of London.
One of NewTec's recent geo-mechanical field models resulted in adding 600 million bbls of oil to the reserves and accurate predictions of open fracture location and orientation, in-situ stresses and reservoir quality. Other models have successfully guided exploration, appraisal and development in complex geological settings.
2006 Visiting research professor at the Department of Geography, Geology and Mineralogy of the University of Salzburg, Austria (Part time position in addition to managing NewTec)
1999 NewTec International BV., founder and managing director.
1999 - 2004 Vrije Universiteit Amsterdam, earth sciences top research school (ISES), associate professor, head analogue tectonic modeling lab.
1990 KSEPL, Rijswijk, senior research geologist, internal advisor (exploration, production and technical audits).
1986 Turkse Shell, chief geologist exploration and production, chief petrophysicist.
1983 Thai Shell Bangkok, production geologist.
1979 Shell research, KSEPL Rijswijk, structural geology research geologist.
1979 PhD, Research School of Earth Sciences at the Australian National University. Structural Geology and Radiometric Dating.
1975 MSc, Leiden University, structural geology and sedimentology.
Explore other courses under this discipline:
Instructor: Dr. Jon R. Rotzien (Basin Dynamics, LLC)
Deep-water depositional systems form some of the largest petroleum reservoirs on Earth and represent the frontier of oil and gas exploration. However, deep-water depositional systems remain the least well understood because sediment gravity flows, including turbidity currents to hybrid and debris flows, are both infrequent and difficult to predict and monitor, setting them apart from sediment transport processes occurring on mountain tops to shallow marine settings. Therefore, modern seismic data, and, in particular, deep-water outcrops provide prime sources of stratigraphic data used to risk drilling targets and build reservoir models at every phase in the upstream exploration and production process. This course focuses on sub-bed-scale to field-scale architectural elements in deep-water depositional systems and how they affect the main risks in deep-water E&P across the value chain: reservoir presence, deliverability, seals and traps.
Instructor: Dr Gary Hampson (Imperial College London)
Sequence stratigraphy is now a well-established analytical tool for investigating sedimentary successions, with the aim of predicting the distribution of reservoir, source rock and seal lithologies. Over the last 20 years, concepts that were originally developed from seismic reflection data have been refined by application to wireline-log, core and reservoir production datasets.
Instructor: Dr Janrik van den Berg (Utrecht University and ENRES International)
Knowledge of the physical background of the preserved structures is a prerequisite to understand the mutual relations of structures found in cores that guide us in interpretation solutions and that help us to keep our imagination of the paleo-environment within realistic borders.
First the physical background of sedimentary structures produced by flowing water or waves is treated. These are the “building stones" of any depositional facies or depositional sequence. A proper and accurate interpretation of these in terms of bedforms and flow conditions is essential for understanding the origin and development of any depositional facies or depositional sequence.
After this focus is laid on special structures and vertical successions of structures that characterize fluvial, tidal and transitional fluvial-tidal environments. With transgression and regression, the facies of transitional sediments will move up and down the lower river reach. Recognizing these deposits is important as in sequence stratigraphy they permit a more precise determination of maximum flooding surfaces.
Instructor: Dr George Bertram (Stratigraphic Research Int.)
Seismic data contains a wealth of information if you know where and how to look for it. Using a number of seismic based examples and 'hands on” interpretation exercises from different geological settings worldwide, attendees will learn how to identify different depositional environments, predict facies, (especially reservoir, source rock and seal) measure water depths, calculate subsidence trends, recognize and quantify sea-level changes and, where appropriate, determine the paleo weather conditions. Issues of flattening and datuming to improve the understanding basin evolution will also be addressed.