Introduction:
Seismic interpretation is a critical step in evaluating the subsurface. Interpretation turns the large investments in seismic data acquisition and processing into tangible value: A plausible geological subsurface model that can be used for making well considered E&P decisions with major investment consequences. Seismic interpretation therefore plays a pivotal role in the E&P workflow and requires dedicated skills development. The aim of this course is to provide the necessary foundation in principles and workflows of seismic interpretation.
The basics of seismology will be covered as well as acquisition, processing, and interpretation. Exercises will be worked in the course to demonstrate different interpretation techniques and pitfalls. The emphasis will be to make the candidates aware of the strengths and limitations of seismic reflection data in exploring for oil and gas. Applied examples will be shown of several case studies as well as the application of AVO (amplitude variation with offset) and seismic attributes in the lowering of risk. The candidates must have basic geophysical knowledge and understanding of exploration and reservoir geology.
The course will be delivered in a way to meet the specific background and needs of the participants. The content can be tuned to the geological setting in which participants operate, and focus on those interpretation techniques that are most likely to be successful there. The course can be extended with extra time for coaching participants on their own seismic interpretation projects. The course uses a mixture of lectures, exercises and case histories. The participants can bring own cases for discussion.
Course Objectives:
By the end of this course delegates will learn about:
The course participants will have a solid foundation in Seismic Interpretation principles and workflows. They will be able to plan and execute an interpretation project and be able to avoid the most common pitfalls and will be familiar with interpretation QAQC. Whereas the course does not cover training in the hands-on use of common industry software tools for interpretation, it will provide the necessary foundation required for subsequent use of such tools in a professional manner.
Course Outline:
Exercises on seismic fundamentals
Brief summary on seismic acquisition and processing, focusing on aspects that have direct relevance for interpretation, such as minimum/maximum offset, multiplicity, type of imaging, phase issues etc.
•Seismic acquisition/processing related exercises
Generation of synthetic seismograms and well-to-seismic matching
Well-to seismic matching exercise
Summary of well geophysics
Interpretation fundamentals and introduction of 2D/3D seismic interpretation workflows
Marker recognition and transfer
Seismic (volume) attributes for seismic interpretation
Seismic illustration of structural styles: extension, compression, wrench and halokinesis
Exercise with examples from the different styles
Structural interpretation workflow in detail
Exercise with round correlation of shallow markers
Horizon tracking exercises
Mechanics of faulting and fault interpretation
Exercise with hand interpretation of fault segments
Brief summary of stratigraphic interpretation
Exercise on stratigraphic interpretation
Interpretation pitfalls
Interpretation project QAQC
Overview of seismic velocities
Time-to-depth conversion
Exercise on seismic velocities, and time-do-depth conversion
Mapping and contouring
Contouring exercise
Volumetrics and uncertainties
Exercise on volumetrics
Seismic expression of DHI’s
Introduction to rock and fluid prediction from seismic
Seismic inversion and AVO
Exercises
Case study
Introduction:
This five day Advanced Seismic Interpretation Course is designed for E&P professionals and aims to provide essential knowledge on visualization, integration, and interpretation techniques that have been recently developed for seismic data. This course assumes an advanced knowledge of seismic interpretation and concentrates on the role of the seismic interpreter in the search for oil and gas.
The course uses learning objectives that are aimed at knowledge and application levels, enabling participants to gain a solid understanding of the applications and role of the seismic interpreter in studies that involve post-stack seismic attributes, AVO, seismic sequence stratigraphy, seismic geomorphology, 4D time-lapse seismic and multidisciplinary integration.
Using recent and relevant case histories, data examples, and exercises, conducted both on paper and with the PETREL software, the course guides participants through an understanding of the integration of all available data into the seismic model that adds value in the needed coherent and successful seismic predictions that result from an interpretation.
Course Objectives:
By the end of this course delegates will learn about:
To acquire skills in interpretation of 3-D seismic data
To enhance theoretical knowledge of seismic structural interpretation, stratigraphic interpretation, reservoir identification and evaluation, and horizon and formation attributes
•
Be familiar with PETREL software
Who Should Attend?
Exploration and Production Managers, Geoscientists, Geologists, and Reservoir Engineers Professionals involved in seismic interpretation or dealing with results of the interpretation of seismic data
Course Outline:
Introduction and general overview
Visual perception, understanding and impact on interpretation
Fundamental of signal theory, wavelet, resolution and scaling
Geological concepts, sedimentary models and structural styles
Central frequency, wedge modeling and tuning analysis exercises
Mapping exercise
Introduction to the PETREL software - seismic interpretation module
Interpretation overall procedure, 2D and 3D techniques
Sequence stratigraphy and seismic facies analysis
Seismic geomorphology, stratal slicing and volume flattening
Seismic geomorphology exercise
Case history on automated fault interpretation
Sequence stratigraphy exercise
Structural validation exercise
Automated fault mapping exercise
Post stack attributes, reflective attributes and transmissive attributes
Geometrical attributes, trace similarity and stratigraphic volume attributes, texture, curvature etc.
Multi-attributes analysis, calibration, applications, pitfalls and limitations
Attributes classification, FA, PCA, statistical, neural networks, unsupervised, and supervised classification
Attributes analysis on carbonate reservoir case history
Unsupervised classification exercise
Reservoir Thickness analysis from seismic attributes exercise
Spectral decomposition
Basics of rock physics and seismic inversion
AVO theory and pre-stack attributes
Overview of depth conversion methods and uncertainty
Multi-attribute reservoir characterization exercise
Depth conversion exercise
AVO gradient-intercept exercise
Multicomponent seismic interpretation
4D time lapse seismic and reservoir monitoring
Gas hydrates interpretation
Overview on naturally fractured reservoir characterization from seismic
4D interpretation exercise
Fractured reservoir characterization with attributes exercise