Seismic
Characterization of Mound Reservoirs Using
Iterative Modeling Procedure
B. J. Rafison, Charles J. Stuart
A seismic
stratigraphic analysis based on
seismic
attribute
and stratigraphic
modeling techniques was done on Paleocene submarine fan mounds in two North Sea
blocks. The principal objective of these studies was to develop new
interpretation concepts for resolving and mapping sandstone buildups and channel
fills. Improved resolution and interpretation of these features should
contribute to development of Paleocene exploration plays and reservoir
characterization in these blocks.
The study was carried out in two phases. (1) In the first phase, we examined
variations in seismic
response (attributes) of
seismic
data from five lines in
the area. Each
attribute
contributed in some way to resolution of Paleocene
units and provided more robust interpretation of the data. During this process,
we used manipulated and enhanced
seismic
data to extract more information from a
given data set. (2) In the second phase, synthetic seismograms were generated
from stratigraphic models (using an iterative process) based on well control in
the North Sea blocks. The iterative modeling evolved as a result of detailed
integration of geologic and
seismic
data, in which geological concepts were
tested one at a time by comparing synthetic seismograms with field traces.
Models were cons ructed to analyze internal and external reflection
characteristics, continuity of reflections, and geometry of fan mounds in those
blocks.
The results of this modeling revealed new relationships about Paleocene deep water deposits in the North Sea.
AAPG Search and Discovery Article #91024©1989 AAPG Pacific Section, May 10-12, 1989, Palm Springs, California.