Reservoir delineation by geophysical methods in the Suizhong 36-1 oil field, Bohai Gulf, China
- Gustavson, Associates, Inc., Boulder, CO (USA)
The Suizhong 36-1 oil field is located in Liaodong Bay, People's Republic of China. Oligocene fluviodeltaic and lacustrine sandstones contain over 1 billion bbl of oil in place in a combination structural-stratigraphic trap. An international effort to delineate the reservoirs by geophysical methods was completed in June 1989. Three hundred and fifty kilometers of seismic data were reprocessed and interpreted. An attempt was made to reprocess vertical seismic profile data to better relate seismic data to subsurface reservoir parameters. Unfortunately, incomplete field data and/or documentation made such an effort infeasible. Synthetic seismograms were used for correlation and for wavelet processing of the seismic data. Seismic-petrophysical analyses were done to relate the measurable seismic parameters to the subsurface rock and fluid parameters. Seismic data processing comprised conventional reprocessing, special processing primarily for hydrocarbon indicators, and three-dimensional velocity analysis. The reprocessing of the seismic data improved data quality over that of the original processing. Amplitude vs. offset processing revealed no obvious hydrocarbon indicators in the main reservoir zones. Velocity analysis produced a three-dimensional velocity field that was the key to the interpretation and engineering work that followed. Stratigraphic and structural interpretation was done on a GeoQuest workstation and iterated several times to obtain a consistent match with the wells. Seismic attribute generation and analysis were used primarily to reveal patterns associated with the depositional environments. Two kinds of seismic trace inversion processes were used to obtain quantitative estimates of the subsurface acoustic impedance distribution. One, the approximate or pseudoinversion method developed by Lindseth was applied to 300 km of seismic data and was the basis for all the reservoir parameter estimates.
- OSTI ID:
- 7091256
- Report Number(s):
- CONF-900605-; CODEN: AABUD
- Journal Information:
- AAPG Bulletin (American Association of Petroleum Geologists); (USA), Vol. 74:5; Conference: Annual convention and exposition of the American Association of Petroleum Geologists, San Francisco, CA (USA), 3-6 Jun 1990; ISSN 0149-1423
- Country of Publication:
- United States
- Language:
- English
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Reservoir delineation by geophysical methods in the Suizhong 36-1 oil field, Bohai Gulf, China
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Related Subjects
58 GEOSCIENCES
CHINA
OIL FIELDS
RESERVOIR ROCK
DATA ANALYSIS
GEOLOGIC TRAPS
SANDSTONES
SEISMIC SURVEYS
STRATIGRAPHY
TERTIARY PERIOD
THREE-DIMENSIONAL CALCULATIONS
ASIA
CENOZOIC ERA
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGY
GEOPHYSICAL SURVEYS
MINERAL RESOURCES
PETROLEUM DEPOSITS
RESOURCES
ROCKS
SEDIMENTARY ROCKS
SURVEYS
020200* - Petroleum- Reserves
Geology
& Exploration
580000 - Geosciences