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Seismic lithostratigraphy of deep subsalt Permo-Carboniferous gas reservoirs, Northwest German Basin

M. E. Mathisen and Manfred Budny
Seismic lithostratigraphy of deep subsalt Permo-Carboniferous gas reservoirs, Northwest German Basin
Geophysics (October 1990) 55 (10): 1357-1365

Abstract

Recent improvements in land seismic data quality have made it possible to initiate lithostratigraphic interpretations of deep (4000-5000 m; 2.2-2.8 s) subsalt Permo-Carboniferous gas reservoirs in the Northwest German Basin. The first modeling and interpretation results indicate that the reflection character of Permian reservoir dolomites and sandstones can be interpreted to predict lithology and porosity variations using reflection character analysis. These formations are commonly thick enough to be resolved (>20 m) and typically have velocities 1000 to 2000 m/s slower than overlying and underlying nonreservoir rocks.Deeper Upper Carboniferous reservoir sandstones occur within a discontinuous low-amplitude seismic facies which can be clearly differentiated from a continuous high-amplitude facies formed by the less prospective Upper Carboniferous coal measures.The accuracy of Permian reflection character interpretations is dependent on the availability of high-frequency, zero-phase, relative amplitude seismic data. New 3-D data are appropriate but of limited availability. To provide suitable 2-D data, wavelet processing of selected variable vintage lines was completed. More routine use of wavelet processing and lithostratigraphic interpretation methods should help to better define reservoir facies and stratigraphic traps, lower prospect risk, and increase success ratios.


ISSN: 0016-8033
EISSN: 1942-2156
Coden: GPYSA7
Serial Title: Geophysics
Serial Volume: 55
Serial Issue: 10
Title: Seismic lithostratigraphy of deep subsalt Permo-Carboniferous gas reservoirs, Northwest German Basin
Affiliation: Mobil Erdgas-Erdoel, Celle, Federal Republic of Germany
Pages: 1357-1365
Published: 199010
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 12
Accession Number: 1990-053139
Categories: StratigraphyApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., geol. sketch map
N52°04'60" - N52°07'00", E05°34'60" - E07°07'00"
N51°15'00" - N53°49'60", E07°00'00" - E11°30'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 1990
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