Geoscience Reference
In-Depth Information
SSTVD
MD
CAL 240.00 DT
40.00
150.00
2.95
150.00
0.20
0.20
RMED
RDEP
SSTVD
MD
CAL
DT
GR
DEN
NEU
RMED
RDEP
AI
SS
TWT
TVD Subsea
Measured Depth
Caliper
P-Sonic
Gamma Ray
Density
Neutron Density
Medium Resistivity
Deep Resistivity
Acoustic Impedance
Synthetic Seismogram
Tw o Way Time
0.00
GR
45.00
NEU
200.00
1975
2025
2000
2050
2075
2025
Base upper sandstone
2100
Approximate depth of
RGB blend slice
2050
2125
2150
2075
(B)
ms
20Hz Ricker
GR
1950
BALDER_FM
BALDER_FM
1975
SELE_FM
S
ELE_FM
2000
HERMOD_FM
HERMOD_FM
2025
2050
LISTA_FM
LISTA_FM
(C)
Hermod
Fig. 9.
(a) Petrophysical logs with calculated acoustic impedance and synthetic seismogram for well 25/6-3. The base of
the youngest 30 m thick sandstone corresponds to an increase in acoustic impedance which sets up a red peak in the syn-
thetic seismogram; (B) two identical seismic well sections through well 25/6-3, one with synthetic seismogram and one
with gamma ray curve. The position of the core is shown on both sections. The core photos to the right document (left) a
3 cm to 5 cm thick injectite near the top of the Sele Formation and (right) the sharp transition from massive sandstone to
dark grey claystone on top of the youngest of two 30 m thick sandstone intervals in well 25/6-3; (C) a sinuous channel
(channel C3 previously discussed, Fig. 5) displayed by draping a time-slice through the RGB blend at the approximate level
of the top of the oldest 30 m thick sandstone in well 25/6-3, on the near Top Hermod Formation seismic interpretation. Sub
Sea True Vertical depth (SSTVd) and Md are in metres. dT = delta - T (interval transit time).
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