A partner of excellencefor oil and gas professional development

E-151 - Seismic & Sequence Stratigraphy for Oil & Gas Exploration

10 days GEO/STRATADV
Level
Advanced
Audience
  • Geologists, geophysicists, production managers and engineers involved in exploration or reservoir characterization.
Purpose
  • This course provides, through daily practical exercises and an integrated project, a thorough and very practical understanding of seismic and sequence stratigraphy for oil and gas exploration.
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.
Prerequisite
  • No prerequisites for this course.
Ways and 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.

Week 1
Sequence stratigraphy concepts & method 2 days
  • 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 1.5 days
  • 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 1.5 days
  • 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) 1.5 days
  • 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) 1.5 days
  • 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 2 days
  • 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.