Understanding through seeing - the role of seismic in an integrated study of a mature Nigerian field

Conference · Mon Jan 01 00:00:00 EST 1996 · AAPG Bulletin

OSTI ID:6573036

Hartung, M

The impact of integration of both data and disciplines is presented in the case of an Nigerian field, with particular emphasis on the central role of seismic data: A pre-requisite for any seismic interpretation is a reliable well-to-seismic tie. Due to log data availability and quality, this match was only achieved by generating synthetic seismograms based on acoustic impedance models. The seismic time interpretation was guided by the geological framework following sequence stratigraphical principles. Depth conversion and evaluation of volumetric uncertainties were based on all data. The resulting STOIIP estimates have been compared to the volumes derived independently from production data. It then became possible to explain apparent mismatches seen in some reservoirs by modifying the best-estimate volumes within the uncertainties and by comparison with analogue reservoirs Channel-like amplitude features encountered in shallow reservoirs helped to explain variable production performance and consequently to identify appraisal and development opportunities. Some of the deeper, shoreface sands seem to behave in a more tank-like manner. This is not only confirmed by recent RST-logs, but also by seismic flatspots. The flatspots are conformable to structure and reflect the remaining oil distribution. These results highlight the value of continuous integration of data and disciplines to the petroleum engineering study.

• OSTI ID: 6573036
• Report Number(s): CONF-960527-; CODEN: AABUD2
• Journal Information: AAPG Bulletin, Vol. 5; Conference: Annual convention of the American Association of Petroleum Geologists, Inc. and the Society for Sedimentary Geology: global exploration and geotechnology, San Diego, CA (United States), 19-22 May 1996; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
NIGERIA
OIL FIELDS
SEISMIC SURVEYS
RESERVOIR ENGINEERING
PETROLEUM
EXPLORATION
AFRICA
DEVELOPING COUNTRIES
ENERGY SOURCES
ENGINEERING
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
GEOPHYSICAL SURVEYS
MINERAL RESOURCES
PETROLEUM DEPOSITS
RESOURCES
020200* - Petroleum- Reserves
Geology
& Exploration
020300 - Petroleum- Drilling & Production