A course to provide you with the skills needed to design and implement workflows for seismic reservoir characterization.
This course will provide participants with the skills needed to design and implement workflows for seismic reservoir characterization based on the Cegal suite of QI applications. The course covers both the theory and practice of coloured inversion, AVO including elastic and extended elastic impedance, DHIs, seismic net pay and inversion including the new stochastic application ODiSI.
This is a classroom based course using examples, laptop based exercises and discussion plus the opportunity to allow participants to immediately apply the theory to real data examples within the Petrel environment using the Blueback Seismic Reservoir Characterization, Blueback ODiSI, Blueback Rock Physics and Blueback Investigator plug-ins. The course can also include a workshop session to discuss your own projects and data.
The core components of the course form an integrated workflow and hence we recommend a minimum of three days to cover the key elements with five days required for a full development of all the elements.
The course will be delivered at an intermediate level. Participants should have a basic knowledge of the seismic method, including acquisition and processing with a minimum of three years working with seismic data. However, the subject matter of this course, AVO and inversion, is covered from basic principles. A complete copy of the slides is provided to each participant.
The course is written and presented by industry expert Patrick Connolly and supported by Cegal.
The primary objective of the course is to help make your seismic more like geology. This is achieved through a number of conceptually simple steps:
This last step will be illustrated using the new stochastic inversion application ODiSI that performs the inversion by matching the seismic data to very large numbers of pseudo-wells.
The key message is that, rather than putting the seismic data into one complicated application, it is better to proceed through a series of simpler, comprehensible steps.
The user can then develop an intuitive feel for the relationship between the input and output and thereby optimize the results from each component of the workflow. This leads to an appreciation of the level of confidence that can be placed in the final results.
Judgment by eye is critical. There is no way to calculate optimum parameters and there is no way to measure the uncertainty of the final results; there are always too many unknowns. For this reason it is always best to apply transformations to the seismic rather than, say, analyzing cross-plots of extracted seismic measurements where context is lost. Staying within the seismic domain provides broader geological context allowing the user to best exercise judgement.
This course provides the theory behind each step of the workflow, reinforced with Excel exercises, and discusses practical aspects of implementation with participants able to apply ideas to real data within the Petrel environment using Cegal plug-ins.
Interactive design and QC of coloured inversion operator exercise.
Interactive EEI analysis of well and seismic data to find optimal chi angle projections exercise.
Undertake a full parameterization exercise for Blueback ODiSI (One Dimensional Stochastic Inversion).
Interactive theoretical inversion exercises in Excel developed by Patrick Connolly.
Interactive theoretical EEI exercises in Excel developed by Patrick Connolly.