Seismic Stratigraphy Workshop

 

Geoscientists in Oslo, Norway participating in the Seismic Stratigraphy Course.

This course is geared towards explorationists who are involved in screening seismic data for possible leads that they develop into prospects. This is a hands-on course (workshop format) where participants will spend most of their  time performing sequence and seismic analysis seismic lines provided by the instructor. The teaching collection of seismic data are text-book examples collected from basins across the globe. The course not only covers the practice of sequence stratigraphy using seismic data (AAPG Memoir 26), but spends quite a bit of time on seismic facies analysis in cross-sectional view. Our module on the use of seismic horizon and stratal slices was revised in July 2014 after taking a detailed course with Henry Posamentier – the pioneer of seismic geomorphology. The course also covers clinoform trajectory analysis that allows the interpreter to predict whether the clinoforms on their seismic data will be sand-rich or if the sand has by-passed the shelf and been deposited in the basin as deepwater fans. Through lots of exercises by the end of the course everyone should be proficient at sequence analysis on seismic lines and be able to interpret depositional environments and net:gross using seismic facies analysis. Participants are strongly urged to bring paper copies of their own seismic data to work on, these data will not be shared with anyone and will only be reviewed by the instructor.

Unlike other course providers we believe 5-days are too short for participants to master both sequence and seismic stratigraphy, which is why we split these topics into two courses.

Who Should Attend

Geologists, and Geophysicists that spend most of their time interpreting seismic data on the workstation. Whether you are an early career geoscientist wanting to learn a systematic methodology for seismic interpretation or an experienced professional wanting to learn some of the latest techniques to have emerged in seismic stratigraphy, this is the course for you.

Course Outline

Day 1. Introduction to seismic stratigraphy and how the science has evolved since the first-models put forth by the Exxon Research Labs, concepts of seismic impedance, resolution and detection, importance of using a scale during interpretation, checking data for processing errors and pitfalls.

Lunch Break

Review of Sequence Stratigraphy in shallow and deepwater siliciclastic systems

Day 2. Seismic sequence analysis: recognition and meaning of reflection terminations such as onlap, offlap, toplap etc. Seismic facies analysis and how reflection configurations can be used to interpret environments of deposition, risk of reservoir presence and quality, and net:gross.

Lunch Break

Seismic Facies Analysis: external geometry, internal reflection configuration, variability in amplitude, interpretation of reflection continuity.

Exercises on performing sequence analysis on high quality seismic data from passive (trailing-edge) continental margins.

Day 3.  Seismic Geomorphology: Differences between seismic time slices, horizon and stratal slices, the workflow for interpretation, range of seismic attributes (spectral decomposition, curvature, etc), fluvial systems, shallow marine systems, deepwater systems, carbonates, mixed structural-stratigraphic trapping styles in channelized sandstone bodies.

Lunch Break

Exercise on performing seismic sequence and facies analysis on instructor’s collection

Day 4. Seismic Imaging of Carbonate Platforms: biostromes vs bioherms, mounds vs reefs, atolls, build-ups, banks and platforms, identification of rimmed attached shelves, isolated platforms and ramps in seismic data, assigning Net:Gross values to different parts of carbonate platforms in seismic, effects of karstification and its seismic expression

Lunch Break

Integrating seismic interpretation with biostratigraphy: index fossils including planktonic and benthic foraminifera, calcareous nannoplankton, dinoflagellates, spores and pollen, the concept of ecostratigraphy, finger-printing and biosteering.

Day 5. Morphology and differences between siliciclastic and calciclastic clinoforms, advection vs diffusion dominated clinoforms, measuring angle and height of clinforms, clinoform trajectory analysis: Bruhn’s Law, clinoform morphology, shelf vs shelf margin-clinoforms, siliciclastic vs carbonate clinoforms.

Lunch Break

Workshop on participant data

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