Discipline Geology
LevelSkill
Duration5 Days
Delivery Mechanism Classroom
Interested in attending this course? Click below to be alerted when scheduled


Print Email

Concepts and Applications of Sequence Stratigraphy to Petroleum Exploration and Production

Participants will learn the methodology and terminology of stratigraphic interpretation that uses a framework of genetically related stratigraphic surfaces that bound the sedimentary facies and geometries of hydrocarbon plays and fields. The better the background participants have in sedimentology and sedimentary systems the easier it will be for the participants to apply sequence stratigraphy in their daily work.

The course provides a template to enable communication between geologists, geophysists, and engineers in the exploration, production and business milieus so they can use this discipline as a predictive tool for regional basin analysis, shelf to basin correlation and reservoir heterogeneity.

The course mixes presentations and exercises executed on participant’s laptop or ipad using Power Point. The results of completed exercises in class use Power Point renditions of exercises. Participants and lecturer will exchange open dialogues.

Participants are welcome to bring papers that focus on local stratigraphy that occupies their professional interest that can be discussed in class.

Instructor

Professor Christopher G. St.C. Kendall is Distinguished Professor Emeritus in the department of geological sciences at the University of South Carolina. He is an internationally-recognised stratigrapher with over 40 years of varied experience in both acedemia and the petroleum industry. He holds a Ph.D. in sedimentology from Imperial College, UK, and M.A / B.A. degrees in Geology from Trinity College, Dublin, Eire. He has authored over 450 scientific publications, 8 books, and 123 papers.

  • Agenda
  • Topics
  • Audience
  • Prerequisites
  • Agenda

    Day 1

    1• Introduction to sequence stratigraphy: the critical stratigraphic surfaces used sequence stratigraphy with their relationship to the exercises briefly outlined.

    2• Basics: introduction to sequence stratigraphy with lecture describing the ideal ‘sequence’ of Vail et al 1977 and its associated terminology.

    3• Clastic Basin: using a movie on the clastic sedimentary response to changing sea level and rates of sedimentation reviewed.

    4• Mixed Carbonate & Clastic Basin: a movie of the fill of a sided sedimentary basin with carbonate and clastic sediment reviewed.

    Chronostratigraphy

    1• Exercise 1 - Chronostratigraphy: construction of a chronostratigraphic chart with the support of a movie that tracks an evolving chronostratigraphic chart and the fill of the associated sedimentary basin.

    Seismic Sequence Stratigraphy

    1• Introduction to Seismic Sequence Analysis: the first steps that need to be taken to make a seismic stratigraphy interpretation and the definition and illustration of genetic reflection packages that envelope seismic sequences and systems tracts.

    2• Exercise 1- Tying a Well Synthetic to a Seismic Line: a seismic cross-section through Little Knife Field tied to a synthetic seismic trace made from velocity log from the Zablotny #1well so determining the local stratigraphy of the Williston Basin.

    3• Exercise 2- Seismic Sequence Analysis: sequence stratigraphy of a seismic line across the lower Cretaceous of the offshore of South Africa

    Day 2

    Clastic Outcrops

    1• Introduction to Sequence Stratigraphy of Clastic Sections - Book Cliffs, Utah : the first steps in the use of measured sections to build sequences stratigraphic models of clastic shoreline depositional systems, using measure sections from the Book Cliffs in Utah.

    2• Exercise 1 - Measured Section at Kennilworth - Book Cliffs, Utah: introduction to parasequence identification on the basis of the lithologies within outcrops. One section is considered and used to identify a vertical set of parasequences within a measured section.

    3• Exercise 2 - Measured Sections at Panther, Kennilworth & Coal Canyons - Book Cliffs, Utah: three measured sections are correlated using a combination of changes in grain size and depositional facies to identify the major stratigraphic surfaces and parasequence stacking patterns that are tied from section to section.

    4• Exercise 3 - Measured Sections from Gilson Gulch to Coal Canyon - Book Cliffs, Utah: correlation of twelve measured sections in the Book Cliffs and construction of a regional sequence stratigraphic interpretation of facies geometries using lithofacies, major surfaces, and parasequences to tie these together.

    Well Log Sequence Stratigraphy - Clastic High-Frequency Signals

    1• The Geologic setting of the La Pascua Formation - Guarico Sub-Basin Venezuela: general geological setting of the nearshore clastics of the Lower Oligocene La Pascua Formation of the Las Mercedes Field in the West Guarico Block, Venezuela, their lithology, relationship to sea level and plate tectonic setting.

    2• Introduction to Sequence Stratigraphy of the La Pascua Formation - Guarico Sub-Basin: first steps in the use of well logs to build sequences stratigraphic models of clastic Shoreline depositional systems for the Lower Oligocene La Pascua Formation of the Las Mercedes Field in the West Guarico Block, Venezuela.

    3• Exercise 1 - Well log correlation using SP & RES logs: interpretation of local north eastern Venezuelan clastic Stratigraphy using three wells (W-1, W-2, W-3) that penetrate the Lower Oligocene La Pascua Formation of the Las Mercedes Field in the West Guarico Block.

    4• Exercise 2 - Well log correlation using SP & RES logs: interpretation of local north eastern Venezuelan Stratigraphy and identification of a clastic Sequence in an Incised Valley using 10 wells (W-1 to W-10) that penetrate the Lower Oligocene La Pascua Formation of the Las Mercedes Field in the West Guarico Block.

    5• Exercise 3 - Well log correlation using SP & RES logs: interpretation of local north eastern Venezuelan Stratigraphy and identification of a clastic Sequence of an incised valley, and its relationship to sea level from 22 wells (W-1 - W-22) that penetrate in the Lower Oligocene La Pascua Formation of the Las Mercedes Field in the West Guarico Block.

    6• Exercise 4 - Well log correlation using SP & RES logs: interpretation of local north eastern Venezuelan Stratigraphy and identification of a clastic Sequence of an incised valley, and its relationship to sea level from 5 Wells (me333, me296, me428, me313 and me 486) within the central portion of the Northern Strike Line that penetrate in the Lower Oligocene La Pascua Formation of the Las Mercedes Field in the West Guarico Block.

    7• Exercise 5 - Well log correlation using SP & RES logs: interpretation of local north eastern Venezuelan Stratigraphy and identification of the clastic coastal and Incised Valley sequences, and their relationship to sea level from wells that penetrate in the Lower Oligocene La Pascua Formation of the Las Mercedes Field in the West Guarico Block on a North-South Dip line , a Northern Strike Line and a Southern Strike Line.

    Day 3

    Carbonate Outcrops

    1• Introduction to Sequence Stratigraphy of Carbonates Sections - Miocene Carbonates of Mallorca, Spain the first steps in the use of measured sections to build sequences stratigraphic models of carbonate platform and reef depositional systems, using measure sections from the sea cliffs lining the south eastern shore of Mallorca.

    2• Exercise 1 - Measured Sections at Cap Blanc- Cliffs of Late Miocene Reef Complex: introduction to carbonate cycle identification on the basis of the carbonate lithofacies within outcrops of the Llucmajor reef. Identification of a vertical set of parasequences and cycles within a measured section.

    3• Exercise 2 - Measured Sections at Cap Blanc- Cliffs of Late Miocene Reef Complex: two to three measured sections are correlated using a combination of predicted trajectories of parasequence stacking patterns in the Llucmajor reef, changes in carbonate facies, and major stratigraphic surfaces tied from section to section.

    4• Exercise 3 - Measured Sections and Wells in the Llucmajor Late Miocene Reef Complex: correlation of wells and measured sections in the Llucmajor using predicted reef trajectories to construct a regional sequence stratigraphic interpretation of facies geometries that involve lithofacies, major surfaces, and parasequences that tie them together.

    Day 4

    Seismic Sequence Analysis

    1• Exercise 3- Seismic Sequence Analysis: sequence stratigraphy of five regional seismic lines from the National Petroleum Reserve of Alaska (NPRA):

    a) Objectives & Data: seismic used to determine the geometric relationship of sequences, delta migration, local and regional tectonics, and the eustatic signal.

    b) Geological Setting: Colville “foreland” Basin initiated in the Jurassic and filled by prograding clinoforms of siliciclastics through the Cretaceous and Tertiary.

    c) Class Answer - Sequence Stratigraphy of Lower Cretaceous: slow and constant rate of subsidence with a steady inflow of clastics responding to second and third order eustatic signals in the Cretaceous section with localized higher-frequency (4th order?) events related to delta migration.

    4• Exercise 4 - Seismic Sequence Analysis: carbonate sequence stratigraphy of a regional seismic line from the western Great Bahamas Bank:

    a) Objectives & Data: carbonate sequence stratigraphy of the shelf, reef crest, slope and down slope basin floor fans related to local changes in base level and the Haq et al (1987) sea level chart.

    b) Seismic Line: Cretaceous and Tertiary carbonate sediments of the western Great Bahamas Bank reflect the effects of changes in sea level.

    c) Class Answer – The tie of Sequence Stratigraphy of the Neogene Section to Eustasy: A slow and constant rate of subsidence, and steady flux of carbonates sediments onto the Great Bahamas Bank caused a close balance between aggradation and progradation, while small changes in the rate of relative sea level movement and/or carbonate accumulation causing immediate switches from aggradation to progradation at the margin.

    Day 5

    Devoted to working with NExT’s course attendee sequence stratigraphic problems from the perspective of

    1) Select better quality in house examples that show good exploration potential and reservoir quality focusing on highlighting seismic quality and well logs in the interpretation.

    2) Use seismic interpretation to identify stratigraphic plays. We will use course attendee examples to show how to make picks using well logs, seismic, maps and models.

    3) Identify the important “key stratigraphic traps in present day oil production” matching with examples from the literature to show

    4) Use of in-house examples which combine stratigraphic and structural interpretations with emphasis on their stratigraphic signal rather than structure

    Concluding Lectures

    1) Use of seismic and high frequency well logs interpretations to identify stratigraphic plays. Suggest ways to identify plays using maps, models and seismic.

    2) Importance of “key stratigraphic traps to present day oil production.

  • Topics

    Objective 1 How the sequence stratigraphic framework is used to predict:

    o Play geometries and character

    o Reservoir geometry and character

    Objective 2 How depositional setting is determined from:

    o Order in which strata were laid down

    o Major surfaces subdividing character of sedimentary section forming template for conceptual depositional models, independent of time (relative ages)

    Objective 3 How geometric hierarchy of sedimentary strata and elements formed by the strata are used to learn to construct "accurate" static cellular reservoir models or exploration play models by:

    • Identifing stratigraphic sequences

    • Interpreting seismic reflection geometries

    • Relating sequence stratigraphy to basin architecture, relative sea levels and history

    • Building predictive stratigraphic model

    Objective 4 How to define the basic principles of sequence stratigraphy: accommodation, chronostratigraphy, and unconformities

    Objective 5 Use of sequence stratigraphy with outcrop, logs, cores and reflection seismic

    Objective 6 Role of stacking patterns and seismic reflection configurations and termination

    Objective 7 Application of sequence stratigraphy to process sedimentology and depositional systems

    Objective 8 Sequence stratigraphy role with systems not defined by shelfal accommodation: fluvial, alluvial, aeolian and slope (deep water)

    Objective 9 Differences and application of sequence stratigraphy models including: depositional sequence model (Exxon and subsequent modifications); genetic stratigraphy sequence model (Galloway); transgressive-regression sequences (Embry); model or system tracts based entirely on stacking patterns (Neal & Abreu) and descriptive geometry (Swift&Thorne)

  • Audience

    The course is directed at  geologists and energy professionals, including engineers who need a tool to predict permeability and porosity distribution, explorationists who wish to predict potential oil and/or gas distributions and geologists who wish to predict depositional lithofacies distribution and geometries.

  • Prerequisites

    Degree in Geology or good practical understanding of Petroleum Geoscience. Ability to use simple PC tools such as Microsoft Office (Powerpoint).

  • Prerequisites

©2000-2016 NExT. All Rights Reserved.