Corso registrato:

Corso Computer sedimentary simulation (Sedpak) and sequence stratgraphy
Docente C. Kendall
CFU e ore 5
Finalità
Struttura e durata
Programma DAY 1. MONDAY 12th May 2008
8:30 am 1. Introduction and Sequence Stratigraphic Principles
EXERCISES
9.30 am 2 Chronostratigraphy
Exercise - 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.
10:00 am 3. Use of Simulations & Modeling
10:30 am Coffee Break
10:45 am 4. Stratigraphic/Sedimentary Simulation
11:00 am 5. Sedpak flow and program character
11:30 am 6. Sedpak Execution and Edit menus
12:00 pm 6. Data Requirements
12:30 pm L u n c h
1:30 pm 7. Carbonate Dataset: BAHAMAS/STRAITS OF ANDROS Exercise - 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.
3:00 pm Coffee Break
3:15 pm Continue Carbonate Dataset: BAHAMAS/STRAITS OF ANDROS
4:30 pm Class ends for the day
DAY 2. TUESDAY 13th May 2008
8:30 am 8. 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 - 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 - Seismic Sequence Analysis: sequence stratigraphy of a seismic line across the lower Cretaceous of the offshore of South Africa.
10:30 am Coffee Break
10:45 am Clastic Dataset: TERTIARY BALTIMORE CANYON
12:30 pm L u n c h
1:30 pm 9. Mixed Clastic/Carbonate Dataset: NEUQUEN BASIN, ARGENTINA
3:00 pm Coffee Break
3:15 pm Continue Mixed Clastic/Carbonate Dataset: NEUQUEN BASIN, ARGENTINA
4:30 pm Class ends for the day

DAY 3. WEDNESDAY 14th May 2008
4 Exercise - 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.
5 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 4. THURSDAY 15th May 2008
OUTCROP SEQUENCE STRATIGRAPHY - CLASTICS
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 depositionals 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.

OUTCROP SEQUENCE STRATIGRAPHY - CARBONATES
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 5 FRIDAY 16th May 2008 This could be a day to work with delegate data or

WELL LOG SEQUENCE STRATIGRAPHY - GENERAL PREAMBLE
1 Introduction to Sequence Stratigraphy with Well Logs: the first steps in the use of well logs to build sequences stratigraphic models of depositional system.
2 Well Log Suites: brief description of how different types of well log are used to interpret sedimentary geology.
3 Well Log Response Character: explanation of the use of the shapes of well log curves to track changes in mineral content, and grain size and so interpret sedimentary geology.
4 Well Log Stacking Patterns: explanation of how aggradational, retrogradational and progradational stacking patterns identified on well logs can be used to interpret sedimentary depositional settings.

WELL LOG SEQUENCE STRATIGRAPHY - CLASTIC HIGH-FREQUENCY SIGNALS
1 The Geologic setting of the La Pascua Formation - Guarico Sub-Basin: 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.
8 Solutions for Exercise 1, 2, 3, 4 and 5: interpretation of well log cross-sections of coastal sedimentation and incised valley fill explained with a movie of the evolving clastic sequences.
9 References: References for the interpretation of Well logs and References for the Guarico Sub-Basin geological framework and regional stratigraphy