Sequence Stratigraphy: An Applied Workshop

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Caitlin Hodges
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1 Sequence Stratigraphy: An Applied Workshop Instructor: Prof. Octavian Catuneanu Level: Intermediate Duration: 5 days Course Description and Objectives This workshop presents the concepts and practical applications of sequence stratigraphy for petroleum exploration and production. All concepts are illustrated with field examples of seismic, well-log, core, and outcrop data. In-class exercises emphasize the recognition of sequence stratigraphic surfaces and systems tracts on well-log cross-sections, seismic lines, and outcrop profiles. The points of agreement and difference between the various sequence stratigraphic approaches (models) are discussed, and guidelines are provided for a standardized process-based workflow of sequence stratigraphic analysis. This enables the practitioner to eliminate nomenclatural or methodological confusions, and apply sequence stratigraphy effectively for facies predictions in exploration and production. Who Should Attend Geologists, geophysicists and reservoir engineers who want to learn the method of sequence (and seismic) stratigraphy for correlation, facies prediction, and the delineation of stratigraphic traps. Textbook: Catuneanu, O. (2006) Principles of Sequence Stratigraphy. Elsevier, 375 pp What You Will Learn Historical development of sequence stratigraphy Methods and workflow of sequence stratigraphic analysis Fundamental concepts of sequence stratigraphy Sequence stratigraphic surfaces Systems tracts Sequences and sequence models Time attributes of stratigraphic surfaces Hierarchy of sequences and sequence boundaries Applications to all depositional systems Course Content DAY 1 1. INTRODUCTION Sequence Stratigraphy an Overview Sequence Stratigraphy in the Context of Interdisciplinary Research Sequence Stratigraphy (Page 1 of 6) Dr. Octavian Catuneanu (IPS, Inc.)

2 Sequence Stratigraphy A Revolution in Sedimentary Geology Historical Development of Sequence Stratigraphy Eustatic vs. Tectonic Controls on Sedimentation Concept of Scale Sequence Stratigraphy vs. Lithostratigraphy 2. METHODS OF SEQUENCE STRATIGRAPHIC ANALYSIS Facies Analysis: Outcrops, Core, and Modern Analogues Classification of Depositional Environments Well Logs Seismic Data Workflow of Sequence Stratigraphic Analysis Step 1: Tectonic Setting (Type of Sedimentary Basin) Step 2: Paleodepositional Environments Step 3: Sequence Stratigraphic Framework Exercise: Identification of stacking patterns on 2D seismic data (Gulf of Mexico) DAY 2 3. ACCOMMODATION AND SHORELINE SHIFTS Allogenic Controls on Sedimentation Signatures of Allogenic Controls Relative Importance of Allogenic Controls Sediment Supply vs. Environmental Energy Flux Sediment Accommodation Definitions: Accommodation, Base Level, and Fluvial Graded Profiles Proxies for Base Level and Accommodation Shoreline Trajectories Transgressions Forced Regressions Normal Regressions 4. STRATIGRAPHIC SURFACES Types of Stratal Terminations Sequence Stratigraphic Surfaces Subaerial Unconformity Correlative Conformity Basal Surface of Forced Regression Regressive Surface of Marine Erosion Maximum Regressive Surface Sequence Stratigraphy (Page 2 of 6) Dr. Octavian Catuneanu (IPS, Inc.)

3 Maximum Flooding Surface Transgressive Ravinement Surfaces Wave-Ravinement Surface Tidal-Ravinement Surface Within-Trend Facies Contacts Within-trend Normal Regressive Surface Within-trend Forced Regressive Surface Within-trend Flooding Surface Exercise: Identification of stacking patterns on a well-log cross-section (Alberta) DAY 3 5. SYSTEMS TRACTS Highstand Systems Tract Falling-Stage Systems Tract Lowstand Systems Tract Transgressive Systems Tract Regressive Systems Tract Low- and High-Accommodation Systems Tracts Low-Accommodation Systems Tract High-Accommodation Systems Tract Exercise: Identification of systems tracts on 2D seismic data (France) Sequence Stratigraphy (Page 3 of 6) Dr. Octavian Catuneanu (IPS, Inc.)

4 DAY 4 6. SEQUENCE MODELS Types of Stratigraphic Sequences Depositional Sequence Genetic Stratigraphic Sequence Transgressive Regressive (T R) Sequence Parasequences Sequences in Fluvial Systems Sequences in Coastal to Shallow-Water Clastic Systems Sequences in Deep-Water Clastic Systems Sequences in Carbonate Systems Exercise: Identification of sequences on well logs (Canada) DAY 5 7. TIME ATTRIBUTES OF STRATIGRAPHIC SURFACES Reference Curve for the Definition of Stratigraphic Surfaces Shoreline Shifts, Grading, and Bathymetry Controls on Sediment Grading and Water-depth Changes Summary: Time Attributes of Stratigraphic Surfaces 8. HIERARCHY OF SEQUENCES AND SEQUENCE BOUNDARIES Hierarchy System Based on Cycle Duration (Boundary Frequency) Hierarchy System Based on the Magnitude of Base-Level Changes Discussion 9. DISCUSSION AND CONCLUSIONS Scope and Applications The Importance of Shoreline Shifts The Importance of the Tectonic Setting Moving Forward Toward Standardizing Sequence Stratigraphy Exercise: Identification of sequence stratigraphic surfaces on well logs (Alberta) Sequence Stratigraphy (Page 4 of 6) Dr. Octavian Catuneanu (IPS, Inc.)

5 Sequence Stratigraphy (Page 5 of 6) Dr. Octavian Catuneanu (IPS, Inc.)

6 Course Delivery A combination of lectures, examples, hands-on classroom exercises through 5 days in a workshop format, each day including examples and exercises as described in the outline. Case studies will be presented at the last day of the course, and questions and discussions will be held in the classroom to clarify concepts. Other Course Logistics EXERCISES Participants will do exercises, as indicated in the outline in a workshop setting, or sub group basis. These exercises will be tied to the lectures of that particular day in order to expand the learning and knowledge base of the students. The exercises will also provide means to link practice to theory, and convey practical experiences to the trainees. The instructor will demonstrate the same exercises in order to cap the results and leave solutions for the trainees for their future references SOFTWARE No software will be used COMPUTER PC laptop with normal storage capacity and with Microsoft Excel Sequence Stratigraphy (Page 6 of 6) Dr. Octavian Catuneanu (IPS, Inc.)

Depositional Sequences Sequences

Depositional Sequences Sequences Depositional Sequences Transgressive and Regressive packages can be bound by unconformities Because sediment can only be preserved during net aggradation and progradation All other times there is either