DEPOSITIONAL SYSTEM & FACIES ANALYSIS

This course has been developed to demonstrate to geoscientists and petroleum engineers the procedures employed by geologists in defining depositional facies and developing geological models through the interpretation of sedimentology and sequence stratigraphy and integration with log, core and seismic data.

  • Discipline: Geology
  • Level: Intermediate
  • Duration: 4 Days

Objectives

Introduction

  • Surface and subsurface facies analysis – concepts and techniques
  • Scale – regional to single well
  • Depositional architecture
  • Basins and units

Clastic depositional facies

  • Introduction to clastic sediments
  • Facies analysis
  • Sedimentary structures
  • Data acquisition and log responses
  • Aeolian environments
  • Alluvial fan and floodplain environments
  • Coastal deltaic environments
  • Linear coastal environments
  • Shelf processes
  • Deep marine environments
  • Glacial and glaciogenic environments
  • Source rock facies
  • Regional and field scale mapping

Carbonate depositional facies

  • Introduction to carbonate sedimentology
  • Environmental analysis
  • Classification of carbonate platforms
  • Depositional environments
  • Aeolian and lacustrine facies
  • Sabkha and tidal flat
  • Barrier shoals and lagoons
  • Reef models
  • Pelagic and redeposited carbonates
  • Diagenesis and fracturing
  • Karstic plays
  • Source rock facies
  • Regional and field scale mapping

Sequence stratigraphy

  • Basic concepts
  • Controls on sequence development
  • Parasequences
  • Parasequence sets
  • Sequences and systems tracts
  • Clastic sequence stratigraphy
  • Carbonate sequence stratigraphy
  • Mixed systems: carbonate and siliciclastic

Uses of well logs in lithological and lithofacies analysis

  • SP log
  • Resistivity logs
  • Gamma-ray log
  • Sonic log
  • Porosity logs
  • Caliper logs
  • Diameter logs
  • Image logs
  • Typical log curve shapes
  • Identifying marker beds and bounding discontinuities from logs
  • Correlating logs to conduct regional facies analyses
  • Correlation of stratigraphic units from log data
  • Generating cross sections and facies maps from log data
  • Subsurface mapping and structural analysis from logs

Core data

  • Identifying facies in core
  • Identifying key surfaces and marker beds
  • Correlating with log data

Seismic reflection data

  • Seismic stratigraphy
  • Seismic sequence stratigraphy
  • Identification of reflector terminations
  • Seismic facies analysis
  • 3-D seismic geometry
  • Seismic facies mapping

Audience

  • Geologists, Petrophysicists and Geophysicists.
  • Engineers, Managers and Supervisors.