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Understanding, Assessing and Predicting the Effects of Fractures in Reservoirs

GeoLogica Limited
Course summary
20 hours
1,950 USD excl. VAT
Full time
Online courses
Professional Training

Course description

Understanding, Assessing and Predicting the Effects of Fractures in Reservoirs

This course explores the wide range of structures that fall under the term “fracture” and examines the effects that the different fracture types have on permeability in conventional and unconventional hydrocarbon reservoirs. It establishes an understanding of natural fractures by explaining fracture mechanics and the origins of fractures, and then presents practical approaches to analyzing and working with fractures. Topics include collecting, measuring fracture attributes, differentiating natural from induced fractures, calibrating fracture data (from core, CT scans, outcrops, image logs and seismic), and determining in situ stresses. The course also describes how to forecast fracture types expected in different structural domains and different types of reservoirs, how the differences between extension and shear fractures control both individual fracture permeability and fracture network interconnectedness, and how to assess the interaction between natural and hydraulic stimulation fractures.

Suitability - Who should attend?

Intended for geoscientists, reservoir and completion engineers and petrophysicists who wish to characterize and understand fracture systems and their effects on reservoir permeability. The class includes making assessments of how fracture permeability can be controlled by the in situ stress system, as well as the interaction of natural fractures with hydraulic stimulation fractures.

Outcome / Qualification etc.

  • Different fracture types have different effects on reservoir permeability.
  • Fracture types can vary by lithology within the same structural setting.
  • Fracture types can vary by structural setting within the same lithology.
  • Fracture permeability can be sensitive to changes in the in situ stress during production.
  • Recognizing fracture type in the small sampling of a reservoir offered by core can provide a conceptual model differentiating radial from anisotropic drainage.
  • The interaction of natural fractures with hydraulic stimulation fractures depends on fracture type and orientation relative to the in situ stresses.
  • Insights into fracture mechanics and the origins of fractures, an understanding of natural fractures and their potential effects on reservoirs.

Training Course Content

Part 1: Understanding Natural Fractures Types, Dimensions and Origins

  • Nomenclature and fracture-classification systems
  • Fracture characteristics and dimensions: individual fractures, fracture populations and fracture systems
  • Identifying natural fracture types
  • The geologic origin of stress systems capable of fracturing rock
  • The mechanics of fracturing rock in extension and shear
  • The essential importance of pore pressure in fracture mechanics
  • Correlating laboratory and outcrop fracture observations to theoretical fracture mechanics
  • Mechanical stratigraphy: fracturing in carbonates vs in sandstones vs in shales
  • Fractures related to faults and anticlines: the characteristics of fracture corridors and sweet spots
  • Other fracture types

Part 2: Measuring and Analyzing Natural Fractures in Reservoirs

  • Planning a fracture study: getting the most out of fracture measurements
  • Fracture data sources: core, CT scans, outcrops, image logs and seismic data
  • Fracture data from engineering tests
  • Techniques, methodologies and work flows
  • Coring and core processing protocols
  • Logging core for optimum fracture characterization
  • Distinguishing natural from drilling-induced fractures
  • Analyzing fracture data for use in fluid-flow models
  • Case studies: estimating fracture effectiveness from core data

Part 3: The Effects of Natural Fractures on Reservoirs

  • Fractured-reservoir classification
  • Effects of fractures on drilling and coring
  • Fracture volumetrics
  • Case studies: the Midale Field, the Rulison Field and the Spraberry Formation
  • The permeability behavior of individual fractures
  • The permeability behavior of fracture systems
  • The sensitivity of fracture permeability to changing stresses during production
  • The effects of fault and fracture-controlled sweet spots and barriers
  • Completions: the interaction between natural and hydraulic fractures

Course delivery details

  • 8am-12pm CDT
  • Five 4-hour interactive online sessions presented over 5 days (morning sessions in North America and afternoon sessions in Europe). A digital manual and exercise materials will be distributed to participants before the course. Some reading and several exercises are to be completed by participants off-line.

About provider

Providing world-class training for the energy industry, GeoLogica is an experienced team with an extensive network of tutors and instructors on their books. Their expertise spans both subsurface training for the oil and gas industry, as well as training aimed...


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GeoLogica Limited

Oxford Point, 19 Oxford Road
BH8 8GS Bournemouth Dorset

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