Oil and Gas

Oil and Gas | Reservoir Development

Modelling of Reservoir Structure and Fractures (Somerset, UK)

Course Code: N923
Instructors:  Tim Wynn
Course Outline:  Download
Format and Duration:
5 days

Next Event

Location: Somerset, UK
Date:  16 - 20 Sep. 2024
Start Time: 09:00 BST
Event Code: N923a24F
Fee From: GBP £8,720 (exc. Tax)


This course provides a practical, integrated approach to characterising, classifying, analysing and modelling natural fractures. It uses lectures, modelling software and field examples to deliver an understanding of: geomechanics; the building and use of simple conceptual and more complex finite difference models; and the impact of fractures on well and reservoir productivity and recovery. The course combines field sessions in Somerset looking at world-class fault and joint systems along with classroom sessions assessing the Quantock Field case study that contains different host lithologies and structures that require participants to perform data analysis, fracture model design and creation of a modelling plan.


Event Code: N923a24F
Duration: 5 days
Instructors: Tim Wynn
Dates: 16 - 20 Sep. 2024
Start Time: 09:00 BST
Location: Somerset, UK
Fee From
GBP £8,720 (exc. Tax)
Good Availability
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Duration and Training Method

This course is a combination of

  • classroom sessions comprising lectures, worked examples, hands-on exercises, and discussion
  • visits to coastal field locations that provide illustration of fractures and opportunities for further exercises

Course Overview

Participants will learn to:

  1. Characterise the presence or influence of fractures from a multitude of data sources (open-hole logs, core, image logs, mud losses, PLT’s, well tests, and production performance).
  2. Construct simple conceptual models of fracture origins, types, and distributions for use as input to reservoir modeling.
  3. Plan preliminary proposals for selecting the optimal modeling process for specific modeling objectives.
  4. Develop simplified implicit fracture property models (i.e. fracture porosity, fracture permeability, and sigma) in geocellular modeling packages.
  5. Integrate simplified fracture properties into a finite difference simulator.
  6. Evaluate fracture/matrix fluid exchange mechanisms of imbibition and gravity drainage.
  7. Instigate and run a finite difference simulator in dual porosity/dual permeability mode.

Course content

Fault systems exposed on the North Somerset foreshores deform Triassic to Lower Jurassic stratigraphy and are located on the southern margin of the Mesozoic to Tertiary, E-W and NW-SE trending East Bristol Channel and Central Somerset Basins. Excellent 3D examples of extensional fault systems are exposed in the cliffs and on the foreshore at Kilve in North Somerset. Extensional faults range from a few metres to several hundred metres in strike-lengths and occur in dark coloured shales and interbedded limestones. Extensional and inverted fault systems are also exposed in the cliffs and on the foreshore at Watchet in North Somerset. Inverted Upper Jurassic extensional faults juxtapose grey Lower Jurassic (Lower Lias) shales and interbedded limestones against red Upper Triassic Mercia mudstones.


Day 1

  • Introduction, terminology and definitions. Flow in faults – Darcy & Cubic Law. Introduction to Quantock Field
  • Quantock Field 1. Field – Fault networks at Watchet

Day 2

  • Faults as volumes, faultrock properties, Shale Gouge Ratio, geomechanics
  • Quantock Field 1. Field – Fault networks at Kilve Cliff

Day 3

  • Open joint systems, origins, fluid flow in fractures Cubic Law, geomechanics
  • Quantock Field 2. Field - Joint systems at Kilve Foreshore

Day 4

  • Modelling workflows, single porosity, dual porosity, DFNs
  • Quantock Field 1 & 2 Workflows

Day 5

  • Basement Fracture Systems,
  • Quantock Field 3.

This course is aimed at subsurface professionals working in Oil & Gas, CCS, Gas Storage and Geothermal to provide a basis for understanding and modelling fault and fracture systems and their influence on fluid flow in reservoirs and caprock systems.

Tim Wynn

Tim is the Principal Geologist and Geomechanics Specialist at TRACS International. He has over 29 years of experience in in geological and geomechanical reservoir characterisation and modelling, project management, asset evaluations (CPRs, Audits), and training aimed at supporting decision making in energy companies.

Upon completion of his PhD in 1994, Tim worked as Structural Geologist with GeoScience Limited for 6 years, before working as Geoscientist for ICE Energy Ltd, which was later acquired by TRACS International. Tim has worked for TRACS since 2001, progressing from Reservoir Geologist to his current role.

Tim has considerable experience of characterising and modelling clastic, carbonate, and basement reservoirs in the North Sea, Middle East, Europe, Russia, South America, Africa, and SE Asia. He has a particular interest in characterising and modelling fractured reservoirs and in the application of geomechanics to wellbore stability, reservoir stimulation and reservoir management. He has applied these skills to hydrocarbon, Carbon Capture & Storage (CCS) and geothermal projects and has published technical papers on many of these topics, Tim is also a Technical Paper Reviewer for the Geological Society, London, SPE, and EAGE and an Editorial Board member of Petroleum Geoscience.

Affiliations and Accreditation
PhD Imperial College, London - Structural Geology
BSc Portsmouth Polytechnic – Geology
CGeol- Chartered Geologist
Fellow of the Geological Society, London; Technical Paper Reviewer, Petroleum Geoscience Editorial Board Member
Member of the PESGB
Member of the SPE; Technical Paper Reviewer
Member of the EAGE; Technical Paper Reviewer

Courses Taught 
N445: The Subsurface Applications of Geomechanics
N548: Reservoir Modelling for Storage 
N923: Modelling of Reservoir Structure and Fractures (Somerset, UK)

CEU: 4 Continuing Education Units
PDH: 40 Professional Development Hours
Certificate: Certificate Issued Upon Completion
RPS is accredited by the International Association for Continuing Education and Training (IACET) and is authorized to issue the IACET CEU. We comply with the ANSI/IACET Standard, which is recognised internationally as a standard of excellence in instructional practices.
We issue a Certificate of Attendance which verifies the number of training hours attended. Our courses are generally accepted by most professional licensing boards/associations towards continuing education credits. Please check with your licensing board to determine if the courses and certificate of attendance meet their specific criteria.