Oil and Gas

Oil and Gas | Unconventional Resources

Seismic Attributes and Pre-Stack Inversion Tools for Characterizing Unconventional Reservoirs

Course Code: N284
Instructors:  Satinder Chopra
Course Outline:  Download
Format and Duration
4 days

Summary

Participants will develop the skills required to review, select and interpret the range of seismic attributes and pre-stack inversion tools available for the characterization of unconventional reservoirs including tight sandstones and shales. 

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Duration and Training Method

This 4-day course combines lectures, case history discussions and guided classroom workshops to establish the theoretical basis for the estimation of certain rock properties using seismic data and enable participants to determine which seismic attributes are most likely to be useful in various reservoir characterization projects.

Course Overview

Participants will learn to:

  1. Synthesize the various rock physics measurements for unconventional reservoirs that may be estimated from seismic data.
  2. Evaluate petrophysical variations in shales, oil sands, and tight sands observed in calibration wells and be able to predict observable diff erences in the expected seismic response.
  3. Assess the infl uence of tectonic stress history and also the importance of rock properties such as brittleness on reservoir performance.
  4. Select appropriate seismic attributes (amplitude, azimuthal anisotropy measurements, AVO, acoustic impedance, elastic impedance, curvature, coherence etc.) expected to be useful predictors of enhanced reservoir performance.
  5. Construct rose-diagrams from seismic attributes that can be used to study structural orientations and stress fields.
  6. Assess the relevance of seismic inversion measurements such as Lamda-Rho, Mu-Rho, Young’s modulus and Poisson’s Ratio that might be helpful to engineers in well planning and reservoir stimulation design.

Day 1: Introduction

  • Overview of current best practices
  • Seismic resolution, spectral enhancements
  • Spectral decomposition
  • Introduction to seismic inversion methods and geo-statistics
  • Impact of local stress and fractures on seismic measurements
  • Rock mechanics, seismic inputs for drilling & stimulation
  • Seismic measurements as inputs to reservoir characterization
  • Overview of seismic toolset; post stack vs. pre-stack attributes

Day 2: Curvature attributes

  • Coherence Attributes
  • Amplitude vs Offset (Angle) interpretation
  • Combined Attributes
  • Preconditioning of seismic data for attribute analysis
  • Guided Interpretation Workshop

Day 3: Overview of Shale oil/gas reservoirs

  • What can we expect to observe with seismic data?
  • Source rock characterization
  • Effect of in-situ stresses on seismic response
  • Characterization of shale gas reservoirs using prestack inversion tools
  • E_Rho as a brittleness indicator
  • Seismic measures as inputs to reservoir characterization & engineering
  • Technical challenges, environmental issues
  • Case histories, examples
  • Guided Interpretation Workshop

Day 4: Tight sandstone reservoirs – challenges

  • Gas vs. oil vs. water; can we tell the difference?
  • Azimuthal anisotropy measurements to predict open fractures
  • Seismic measures as inputs to reservoir characterization & engineering
  • Case histories, examples
  • Summary of seismic attributes
  • Guided Interpretation Workshop

Geoscientists, processing geophysicists and engineers having an understanding of the fundamental principles of the seismic method, with a minimum of one year’s experience interpreting seismic data, and who are interested in learning more about the application of seismic attributes to characterize unconventional reservoirs.

Satinder Chopra

Background

He joined the Oil and Natural Gas Corporation Limited (ONGC) of India in 1984 and served there till 1997. In 1998 he joined CTC Pulsonic at Calgary, which later became Scott Pickford and Core Laboratories Reservoir Technologies. Currently, he is working as Chief Geophysicist (Reservoir), at TGS, Calgary.

In the last 34 years Satinder has worked in regular seismic processing and interactive interpretation, but has spent more time in special processing of seismic data involving seismic attributes including coherence, curvature and texture attributes, seismic inversion, AVO, VSP processing and frequency enhancement of seismic data. More recently, his research interests have focus on techniques that are aimed at characterization of unconventional reservoirs. He has published 8 books and more than 440 papers and abstracts and likes to make presentations at any beckoning opportunity. He is the Past Chief Editor of the CSEG RECORDER, the past member of the SEG ‘The Leading Edge’ Editorial Board, and the Ex-Chairman of the SEG Publications Committee.

He is the recipient of several awards at ONGC, CSEG, SEG, AAPG and APEGA and more recently has received the 2017 EAGE Honorary Membership Award, 2014 ‘SEG Best Poster’ Award for his paper entitled ‘Churning seismic attributes with principal component analysis’, the 2014 CSEG Honorary Membership Award, the APEGA ‘Fellow Geoscientists Canada’ and the ‘2013 Frank Spragins Technical Award’, the ‘2013 AAPG Jules Braunstein Award’ for the Best Poster Presentation at the Annual Convention, the 2012 GeoConvention Best Poster Award (as co-author) for the poster entitled ‘Determination of Elastic Constants using Extended Elastic Impedance’, the AAPG George C. Matson Award for the ‘Best Oral Presentation’ for his paper entitled ‘Delineating stratigraphic features via cross-plotting of seismic discontinuity attributes and their volume visualization’, presented at the 2010 AAPG Annual Convention held at New Orleans, the ‘Top 10 Paper’ Award for his poster entitled ‘Extracting meaningful information from seismic attributes’, presented at the 2009 AAPG Annual Convention held at Denver, the ‘Best Poster’ Award for his paper entitled ‘Seismic attributes for fault/fracture characterization’, presented at the 2008 SEG Convention held at Las Vegas, the ‘Best Paper’ Award for his paper entitled ‘Curvature and iconic Coherence-Attributes adding value to 3D Seismic Data Interpretation’ presented at the CSEG Technical Luncheon, Calgary, in January 2007 and the 2005 CSEG Meritorious Services Award. He and his colleagues have received the CSEG Best Poster Awards in successive years from 2002 to 2005.

Affiliations and Accreditation
MSc M.Phil“Himachal Pradesh University, Shimla, India (Physics)”

Member of the following:

SEG
CSEG
CSPG
EAGE
AAPG
APEGA

Courses Taught
N284:Seismic Attributes and Pre-Stack Inversion Tools for Characterizing Unconventional Reservoirs

CEU: 3.2 Continuing Education Units
PDH: 32 Professional Development Hours
Certificate: Certificate Issued Upon Completion
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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.