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Pre-Stack Seismic Inversion with PreStack Pro
Sharp Reflections’ PreStack Pro software contains dedicated seismic inversion modules to transform seismic reflectivities and amplitude versus angle (AVA) signatures into impedances, facies, and other rock and fluid properties. This interactive online course guides you through the principles behind pre-stack Bayesian seismic inversion and its practical, hands-on application.
Our knowledgeable team will help you through a real-world inversion project, investigating the seismic response of a complex heterogeneous reservoir. At the end of the course, you will understand basic inversion concepts, and be able to set up, run, and quality control seismic inversions using PreStack Pro software.
Two complementary algorithms are covered in the course: CRAVA and PCube+. CRAVA is a traditional pre-stack inversion which calculates elastic rock properties (density, Vp, Vs) from seismic amplitude cubes. PCube+ is a newer, “one-step” approach that estimates the probabilities of distinct lithology and fluid classes directly from the seismic data, with the aid of prior models that incorporate petrophysical reservoir properties and seismic horizons. Both methods transform seismic reflectivity volumes into layered property cubes, which provide valuable input to 3D reservoir models.
See how easily you can go beyond seismic for your interpretation in a single package.
Course takeaways
- Understand how Bayes Theorem is applied to seismic inversion
- Exploit well information to build an inversion prior model
- Incorporate geologic constraints when building a prior probability model
- Understand and define elastic and classification inversion parameters
- Quality control inversion results
- Understand the differences between elastic property and classification inversion
Recent Training Testimonials
“This has been one of the best courses I ever attended!”
“Thank you for the course! Tons of great info, it will be very useful. I appreciate it.”
“Great video lectures and great course material. Will go through this again with my own data.”
“The virtual class was very productive for me.”
“Very knowledgeable instructors.”
Program:
Tues 12 September 9:00-13:00 (CET)
- The Johan Sverdrup oil field
- Well ties and wavelet estimation
Wed 13 September 9:00-13:00 (CET)
- Assess resolution limitations of seismic and inversion processes
- Bayesian seismic inversion
- Building a low frequency (CRAVA) model
- Traditional (CRAVA) seismic inversion parameterization
Thurs 14 September 9:00-13:00 (CET)
- Interpretation of inversion-derived elastic properties
- Introduction to Rock Physics Models and litho-fluid classes (LFC) in elastic space, in preparation of a PCube+ classification inversion
- Parameterising PCube+ probabilistic inversion
Fri 15 September 9:00-13:00 (CET)
- Interpreting the results of the probabilistic inversion, including uncertainties in classification and interpreted horizons
- Estimating unit thicknesses from inversion results
- Compare CRAVA and PCube+ inversion results on synthetic (wedge model) and real data
Prerequisites
Delegates should have an understanding of basic rock physics and Amplitude Versus Offset principles. Attendance of Sharp Reflections’ Introduction to Pre-Stack Data Analysis provides this, but it is not a requirement. Day one of the program will introduce the PreStack Pro software package, including data loading and navigation. Videos accompanying the program cover theory behind the seismic response and its inversion as well as details of the inversion algorithms used in CRAVA and PCube+
Hardware requirements
You don’t need a supercomputer to process the data sets. We will test your environment together beforehand – here’s what you will need:
- An up-to-date browser (eg Chrome, Safari, Firefox) with a stable internet connection (>15Mb/s)
- Ability to install HP Remote Graphics Software – download for free here for PC or here for MAC
- Ability to use Teams video-conference application
- A reasonable desktop/screen area (minimum 1920 x 1080), but to get the best experience we recommend two screens.
- Ability to display or print PDF guide to follow while working.
- Ability to view MP4-video files.
- A microphone and speaker or headphones.