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Contenido archivado el 2022-12-27

DELFT SEISMIC INVERSION PACKAGE

Objetivo

The aim of the DelsiPlus project is to implement and demonstrate three of the key elements of the DELPHI (Delft Philosophy on Inversion) research project in the field of stepwise seismic inversion using existing seismic processing software package ProMAX (Landmark Graphics Company). These three selected key elements are Radon transform based filtering and optimized versions of Multiple Elimination and Common Focus Point Imaging. Application of this developed software will give the seismic data interpreter more accurate and more detailed insight in the subsurface, thus reducing overall drilling activities and increasing rates of oil and gas discoveries. The demonstration will use datasets coming from several oil and gas companies and is focused on proving the application of the DELPHI software in an operational environment.
Common Focus Point Imaging, Radon Near Trace Interpolation and Multiple Elimination are successfully implemented in the seismic processing package. For Near Trace Interpolation and Multiple Elimination the software was tested using real data sets. The results were good for near offset gap interpolated traces and also the unwanted seismic multiple reflections were better removed with the pre-stack and post-stack routines compared to other more standard pre-stack or post-stack methods, available on the market. This was expected based on the innovative approach of the DELPHI software. Although, the result is improved, more computer time is consumed compared to more conventional methods in case of pre-stack or post-stack multiple elimination.
Conventional seismic methods consist of three parts : preconditioning, common midpoint stacking and post stack time migration to render a preview of the subsurface from seismic shot records. The stepwise seismic inversion (the DELPHI scheme) may be considered as a very promising alternative to the conventional seismic processing, also making use of shot record input data, yet yielding a wealth of information after each inversion step. The proposed seismic software will consist of three layers resulting in accurate, target oriented stratigraphic and lithologic parameters, i.e. velocity and density maps and above all, rock and pore parameters. Each layer forms an innovative part for which appropriate software needs to be implemented. The elements which are to be implemented in ProMAX and demonstrated in this DelsiPlus project complement the DELPHI software modules to produce a processing inversion scheme, all based on the DELPHI innovative research. In more detail the elements in this project are : 1. Radon Decomposition. The decomposition method will be based on a robust and efficient implementation of the parabolic Radon transform. Its application for P and S wave decomposition is new.
2. Multiple Elimination. This method removes unwanted surface related multiples in the frequency domain.
3. Common Focus Point Imaging. The proposed method to describe the reflectivity of the subsurface and to verify and help update macro-models is unique.

Convocatoria de propuestas

Data not available

Régimen de financiación

DEM - Demonstration contracts

Coordinador

TNO Institute of Applied Geoscience
Aportación de la UE
Sin datos
Dirección
Schoemakerstraat 97
2600 JA Delft
Países Bajos

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Coste total
Sin datos