Szczegóły publikacji
Opis bibliograficzny
Identification of seismic anomalies caused by gas saturation on the basis of theoretical P and PS wavefield in the Carpathian Foredeep, SE Poland / Kaja PIETSCH, Paweł MARZEC, Marcin KOBYLARSKI, Tomasz DANEK, Andrzej LEŚNIAK, Artur TATARATA, Edward Gruszczyk // Acta Geophysica ; ISSN 1895-6572. — Tytuł poprz.: Acta Geophysica Polonica. — 2007 — vol. 55 no. 2, s. 191–208. — Bibliogr. s. 206–208, Abstr. — Publikacja dostępna online od: 2007-03-03
Autorzy (7)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 36820 |
|---|---|
| Data dodania do BaDAP | 2008-01-29 |
| Tekst źródłowy | URL |
| DOI | 10.2478/s11600-007-0002-x |
| Rok publikacji | 2007 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Acta Geophysica |
Abstract
The thin-layer build of the Carpathian Foredeep Miocene formations and large petrophysical parameter variation cause seismic images of gas-saturated zones to be ambiguous, and the location of prospection wells on the basis of anomalous seismic record is risky. A method that assists reservoir interpretation of standard recorded seismic profiles (P waves) can be a converted wave recording (PS waves). This paper presents the results of application of a multicomponent seismic survey for the reservoir interpretation over the Chalupki Debnianskie gas deposit, carried out for the first time in Poland by Geofizyka Krakow Ltd. for the Polish Oil and Gas Company. Seismic modeling was applied as the basic research tool, using the SeisMod program based on the finite-difference solution of the acoustic wave equation and equations of motion. Seismogeological models for P waves were developed using Acoustic Logs; S-wave model (records only from part of the well) was developed on the basis of theoretical curves calculated by means of the Estymacja program calibrated with average S-velocities, calculated by correlation of recorded P and PS wavefields with 1D modeling. The conformity between theoretical and recorded wavefields makes it possible to apply the criteria established on the basis of modeling for reservoir interpretation. Direct hydrocarbon indicators (bright spots, phase change, time sag) unambiguously identify gas-prone layers within the ChD-2 prospect. A partial range of the indicators observed in the SW part of the studied profile (bright spot that covers a single, anticlinally bent seismic horizon) points to saturation of the horizon. The proposed location is confirmed by criteria determined for converted waves (continuous seismic horizons with constant, high amplitude) despite poorer agreement between theoretical and recorded wavefields.
