Establishing Pattern Correlation Between Time Lapse Seismic and Saturation
Abstract/Contents
- Abstract
- The extensive spatial coverage of seismic data provides a unique source of information widely used for surface and facies modeling, faults detection, more generally static heterogeneities modeling. The advent of 4D time-lapse seismic surveys opens a new dimension: the possibility of monitoring fluid flow hence production. Discounting the favorable cases in which fluid displacement can be seen directly from time lapse seismic data, the preliminary challenge is to establish a correlation between saturation changes and seismic data changes.In this research, I address first the procedures for flow simulation and forward seismic simulation, then I focus on the challenge to quantitatively detect the correlation between seismic and water saturation variables. The exhaustively known Stanford V reservoir, over which both flow simulation results and repeated seismic surveys were obtained, is used as the study reservoir. Because of the low resolution of seismic data, one should not expect any useful point-to-point correlation; instead, in the general case one might expect correlations between spatial patterns of seismic time differences and corresponding spatial patterns of saturation changes.This preliminary study aims at developing a general methodology to establish such pattern correlations, hence preparing the way for a systematic utilization of time lapse seismic surveys beyond trivial visual observation. Principal component analysis (PCA) and canonical analysis (CA) were applied to both seismic and water saturation time lapse data. It was found that the pattern correlation of the two first PC's (one for seismic one for saturation) is high around 0.70, which is reflective of the excellent visual pattern correspondence. Canonical analysis increases the correlation value up to almost 0.8. With the help of geostatistical tools, such correlation could be used to estimate or simulate time lapse saturation values using observed PC's or CC's values of seismic time lapse data.
Description
| Type of resource | text |
|---|---|
| Date created | May 2003 |
Creators/Contributors
| Author | Wu, Jianbing |
|---|---|
| Primary advisor | Journel, Andre G. |
| Degree granting institution | Stanford University, Department of Petroleum Engineering |
Subjects
| Subject | School of Earth Energy & Environmental Sciences |
|---|---|
| Genre | Thesis |
Bibliographic information
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Preferred citation
- Preferred Citation
- Wu, Jianbing. (2003). Establishing Pattern Correlation Between Time Lapse Seismic and Saturation. Stanford Digital Repository. Available at: https://purl.stanford.edu/tp905vg2436
Collection
Master's Theses, Doerr School of Sustainability
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