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(Course & Workshop)

"Seismic Sequence Stratigraphic Interpretation"

PROGRAM AGENDA

Day 1

  • Simplified and practical review of the sequence stratigraphy will be
    provided.
  • They key terminologies will be explained and introduction to the
    proposed workflow.
  • Illustrations of the seismic expressions of the sequence stratigraphic
    features will be demonstrated.
  • The significance and value of the sequence stratigraphy in the geoscience
    interpretation.
  • Sequence stratigraphic models
  • Historical background of the concept.
  • The classic versus the modern methods.
  • Exercise 1 (the recognition of the seismic expressions of the sequence
    stratigraphic features).
  • Exercise 2 (Sequence boundary interpretation).

Day 2
Data Conditioning
The recognition of the seismic expression of the sequence stratigraphic features
requires firstly the removal of the noise. In addition, the continuity enhancements and
the discontinuity sharpening is crucial to enable the successive step of the dense
horizons tracking and systems tracts interpretation. This process will demonstrated
with set of examples and hands-on exercises.

  • Exercise 3 (Noise filtering).
  • Exercise 4 (Identifications of the synchronois timelines and on-lap, offlap and down-lap terminations).

Dip-Steering Volume
The dense auto-tracking is a crucial step to depict and extract the constituent
components of the sequences. Dip and azimuth fields are required to be generated.

  • Dip and azimuth fields explained.
  • Horizon cube and stratigraphic horizon timelines explained and
    demonstrated.
  • Exercise 5 (Dip and azimuth field generation).
  • Exercise 6 (Horizon cube generation).
  • Exercise 7 (The identification of the terminations and truncations).

Day 3
Wheeler Transform
The Wheeler transform will transform the dense horizons from the structural domain
to the geologic time domain. This will allow the recognition of the stacking patterns,
the progression, retrograditions and the sequence stratigraphic key surfaces.

  • Wheeler transform.
  • Chronostratigraphic slicing in Wheeler and structural domain.
  • The characteristic features of the maximum flooding features, maximum
    regressive surface, erosional unconformity and condensed surface.
  • Exercise 8 (Wheeler transform).
  • Exercise 9 (Chronostratigraphic slicing and the interpretation of the
    sequence boundaries, terminations, truncations).

Day 4
Systems Tract Interpretation
Systems tracts are the natural habitat of the depositional environments hence the
interpretation of them is the most important step in constraining the gross depositional
environment interpretation and the subsequent facies and property distribution.

  • Conceptual Eustasy curve construction.
  • Systems tract interpretation based in the dip and azimuth fields and the
    characteristic terminations.
  • Exercise 10 (Eustatic curve construction).
  • Exercise 11 (Systems tracts interpretation).

Mapping Seismic Facies
The primary objective of the seismic sequence stratigraphic interpretation is to infer
the paleobathymetry and consequently derive the gross depositional environment and
its sedimentological units and facies content.

Interpreted systems tracts will the window of analysis of the seismic facies aiming to
eventually control the property distribution within their genetic types.

  • Attribute analysis constrained by the systems tracts.
  • Neural network based on the dip and conformal surfaces.
  • Seismic facies classification.
  • Spectral decomposition.
  • Exercise 12 (Neural network based on the dip field).
  • Exercise 13 (Spectral decomposition).

Day 5
Examples and applications will be demonstrated and wrap-up lecture and
Exercises will be carried out on the course content.

  • Applying the facies mapping and the constrained property distribution to
    guide the velocity modelling.
  • Facies-guided seismic inversion.
  • Identification of stratigraphic traps.
  • Exercise 14 (facies-guided velocity modelling).
  • Exercise 15 (Wrap-up group workshop on the course content from
    sequence boundaries to property distribution).
  • Final group discussion & course evaluation.
InstructorAdel Shaker, Msc.
Who Should attend?Explorationists / Development Geologists / Geophysicists / Petrophysicists / Reservoir Modelers
Prerequisite Basic knowledge of seismic interpretation / Access to Petrel and OpendTect

WHY CHOOSING THIS PROGRAM?

In spite of its strength in predictability and intuitiveness of interpreting the
sedimentary successions, the seismic sequence stratigraphic interpretation remained underutilized or sub optimally utilized because of the lack comprehensive and practical scheme and the plethora of jargons. These challenges hampered the use of it in streamlined fashion into the geoscience workflows by the geoscience professionals.
The course was designed to address the aforementioned challenges. The workflow of the seismic sequence stratigraphic interpretation was re-visited in light of the new seismic advancements like the dense horizons tracking, dip-field horizon inversion, seismic facies classification, spectral decomposition .…etc. The applicability of the workflow will be demonstrated throughout the course using set of practical exercises
and case studies.
The course will emphasize the value of using the proposed workflow to confine the interpretation by using the sequence boundaries and systems tracts as constraints for the facies and property distribution.
This course is distinguished from the similar courses by its practicality, applicability and the exploitation of the seismic advancements to utilize the concept in adding confidence and reducing the uncertainty of the geoscience work via repeatable set of exercises.

PROGRAM GOALS

  • Demystifying the seismic sequence stratigraphy in intuitive, practical and
    applicable workflows and seamlessly integrated into the geoscience routines.
  • Grasping an understanding of the subject and building-up the competency and
    the skills to implement the proposed workflows.
  •  Harnessing the proposed workflows in improving the quality of the geoscience
    interpretation and reducing the uncertainty.
  • Using the concept as the overarching notion for the subsurface work and
    organize the geoscience data in genetic temp-spatial framework.
  • Establishing the skills required to implement the Wheeler transform in
    interpreting the sequence boundaries, systems tracts and to derive subsequently
    the prospectively and the reservoir quality.
  • Exploiting the proposed workflows to constrain the facies and property
    distributions.
  • Carrying-out the seismic attribute analysis, spectral decomposition and seismic
    facies classification seamlessly within the seismic sequence stratigraphic
    interpretation demonstrated by hands-on exercise