PreStack Pro – 4D seismic analysis

PreStack Pro – 4D seismic analysis

Intermediate | 4 half days | Online | Hands-on

The 4D seismic analysis course introduces you to the PreStack Pro 4D time lapse analysis functionality. You will learn how to take advantage of the unique multi-dimensional data management capabilities of PreStack Pro to handle seismic vintage as a data type, rapidly interrogate and condition multiple 4D datasets.

With the multi-dimensional functionality, you will learn how to accelerate the identification and mapping of production-induced seismic changes, enabling identification of bypassed oil or poorly drained sections the reservoir. The course aims to familiarize you with matching, differencing and interpreting prestack to stack, baseline and monitor datasets.

This is an online hands-on course where you will be working with the application on a North Sea data set.

Agenda

Session 1

Introduction to Johan Sverdrup dataset and available data
- Geology (incl. porosity, structural setting)
- Reservoir fluids and reservoir production plan
- Seismic character of reflection

Session 2

Extended response modelling of 4D seismic using the parametric modeler
- Rock-physics (incl. pressure + saturation and their effect on Vp, Vs, Rho_b, AI, Vp/Vs)
- Amplitude changes from pressure and saturation changes
- Reservoir time shifts from pressure and saturation changes
- AVO signature from pressure and saturation change
- EEI signature and impact of changes in pressure and saturation

Session 3

Time-lapse QC and data conditioning
- Seismic health checks / data QC
- Repeatability measures
- Application of conditioning workflows to enhance signal
- Matching filters
- Gather analysis and generation

Session 4

4D interpretation and QI
- Generation of 4D attributes (incl. amplitude differences, intercept/gradient differences, fluid/pressure angles from EEI)
- Layer-based and horizon-based attributes, and display on horizons.
- Time shift and time-strain attributes using time shifts derived externally or derived for single horizon
How is 4D used? Tying observed changes to injector / producer history (incl. fault seal, well placement, etc. and the case history “story”)

Audience

Exploration and Production Geoscientists, seismic interpreters, QI geophysicists.

Topics

Advantages of the unique multi-dimensional data management
Advances in handling 4D seismic data and seismic vintages
Extended response modelling of 4D seismic data
4D time lapse QC and data conditioning
4D interpretation and attribute generation

Prerequisite

We recommend that users with no or limited experience in PreStack Pro complete the PreStack Pro Getting started course and Prestack seismic data analysis course.

General knowledge of geophysics, seismic interpretation and rock physics is recommended.

Hardware requirements

In the course you will be connecting to the Sharp Reflections cloud. You will need:

Up-to-date browser (e.g. Chrome, Safari, Firefox)
Stable internet connection (>15MB/s)
Microsoft Teams videoconference

Upcoming courses – 2023

Dates and times to be posted May 2023.

Course fee: EUR 1600 / USD1760

If you are interested in this course please use contact us to enquire about this class.