Seismic & Sequence Stratigraphy for Oil & Gas Exploration

EVAL/STRATADV

Who should attend?

  • This course provides, through daily practical exercises and an integrated project, a thorough and very practical understanding of seismic and sequence stratigraphy for Oil & Gas exploration.
Audience :
  • Geologists, geophysicists, production managers and engineers involved in exploration or reservoir characterization.

Level : Advanced

Course Content

  • WEEK 1

  • Sequence stratigraphy concepts & method

      • Shelfal accommodation space. Tectonic, eustasy and sediment control on the stratal and facies stacking pattern of depositional sequences.
      • Practical paleontology:
      • Establishment of a chronostratigraphic framework to support well and seismic correlation.
      • Precise definitions of paleo-environments and water depths in order to predict reservoir facies.
  • Well log & seismic responses of lowstand systems tracts

      • LST sequence boundaries, slope fans, basin floor fans and prograding complexes.
      • TST & HST basin starvation, source rock and reservoir seal.
      • Biostratigraphic signature of lowstand versus transgressive/highstand systems tracts.
      • Hierarchy of stratigraphic cycles.
  • Well log/seismic responses of neritic systems tracts

      • LST sequence boundaries, incised valley and lowstand prograding complex.
      • TST & HST stratal and facies stacking pattern.
      • HST alluvial, deltaic, shoreline complexes and shelf sands.
      • Biostratigraphic signature of transgressive and highstand systems tracts.
      • Relationship of stratigraphic patterns to changes in subsidence rates as driven by regional and earth scale tectonic processes.
  • WEEK 2

  • Log/seismic responses of neritic systems tracts (alluvial plain to delta front)

      • LST sequence boundaries, incised valleys, major unconformities and prograding complexes.
      • TST incised valley fill, shelfal aggradation.
      • HST alluvial, deltaic, shoreline complexes.
      • Stratal and facies stacking pattern in the alluvial plain.
      • Forestepping sequences and major unconformities as driven by regional and earth scale tectonic processes.
  • Log/seismic responses of neritic systems tracts (siliciclastic shelf)

      • LST sequence boundaries, incised valleys, major unconformities and prograding complexes.
      • TST in shelfal environment (log-to-core scale).
      • HST in shelfal environment (log-to-core scale).
      • Stratal and facies stacking pattern in a siliciclastic shelfal system.
      • Biostratigraphic signature.
      • Hierarchy of stratigraphic cycles.
      • Exploration & Production consequences and related strategies.
  • Data integration

      • Interpretation of a set of wireline logs covering the Mesozoic-Cenozoic succession to tie.
      • Transgressive/regressive facies cycles and unconformity surfaces. A quantitative paleontological datasets is used to aid in determining maximum flooding surfaces, peak transgression and unconformities.
      • Interpretation of a regional basin-scale seismic line tied to the wells. Mapping of various potential reservoir intervals.
      • Data integration: Exploration & Production consequences and related strategies.

Learning Objectives

  • Upon completion of the course, participants will be able to:
  • understand the use of sequence stratigraphy as a tool in basin exploration, and describe related workflow structure,
  • ensure accurate stratigraphic breakdown of well data,
  • manipulate and use a full dataset in an integrated project: well logs, biostrat information, and 2D lines.

Ways & Means

  • The most important elements in this process are accurate stratigraphic breakdown of well database and stratigraphic data loading both into the well and the seismic databases.