Development and application of iterative facies-constrained seismic inversion

To improve the accuracy of inversion results, geological facies distributions are considered as additional constraints in the inversion process. However, the geological facies itself also has its own uncertainty. In this paper, the initial sedimentary facies maps are obtained by integrated geologica...

Full description

Saved in:
Bibliographic Details
Published in:Applied geophysics 2020-12, Vol.17 (4), p.522-532
Main Authors: Xu-Ri, Huang, Li, Li, Fa-Lv, Li, Xi-Sheng, Li, Qi, Chen, Yue, Dai
Format: Article
Language:English
Subjects:
Accuracy
Cluster analysis
Constraints
Earth and Environmental Science
Earth Sciences
Geological mapping
Geology
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Sedimentary facies
Seismic activity
Seismic Inversion and Interpretation
Seismic surveys
Well data
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:To improve the accuracy of inversion results, geological facies distributions are considered as additional constraints in the inversion process. However, the geological facies itself also has its own uncertainty. In this paper, the initial sedimentary facies maps are obtained by integrated geological analysis from well data, seismic attributes, and deterministic inversion results. Then the first iteration of facies-constrained seismic inversion is performed. According to that result and other data such as geological information, the facies distribution can be updated using cluster analysis. The next round of facies-constrained inversion can then be performed. This process will be repeated until the facies inconsistency or error before and after the inversion is minimized. It forms a new iterative facies-constrained seismic inversion technique. Compared with conventional facies-constrained seismic inversion, the proposed method not only can reduces the non-uniqueness of seismic inversion results but also can improves its resolution. As a consequence, the sedimentary facies will be more consistent with the geology. A practical application demonstrated that the superposition relationship of sand bodies could be better delineated based on this new seismic inversion technique. The result highly increases the understanding of reservoir connectivity and its accuracy, which can be used to guide further development.
ISSN:1672-7975
1993-0658
DOI:10.1007/s11770-020-0837-3