Estimating Reservoir Potential of Wadis by Waveform Inversion and Land Streamers
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Transcript of Estimating Reservoir Potential of Wadis by Waveform Inversion and Land Streamers
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Estimating Reservoir Potential of Wadis by Waveform Inversion and
Land Streamers
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Motivation
To characterize the shallow subsurface at Wadi Qudaid for its water storage and reuse potential.
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Area of Interest
KAUST
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Collected Geophysical Data (Seismic Data)
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Seismic DataCSG Samples
0.0
0.30.0 232
X (m)
Tim
e (s
)
0.0
0.30.0 232
X (m)
Tim
e (s
)
0.0
0.30.0 232
X (m)
Tim
e (s
)
0.0
0.30.0 232
X (m)
Tim
e (s
)
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Data Processing
• Apply a bandpass filter of 15 ~ 70 Hz.
• Correct for the geometric spreading: 3D → 2D.
• Correct for attenuation by an estimated Q.
• Mute the near-offset traces within 14 m.
• Extract a natural source wavelet by averaging the near-offset
first arrivals.
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Seismic Result
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Collected Geophysical Data (Resistivity Data)
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P1
P2
Resistivity Result
P1
P2
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Land Streamer Test
Test # 1Saudi Arabia
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Land Streamer
Geophysical Field Laboratory at KAUST has- 5 land streamers- P-wave geophones- 24-channel at each streamer- Up to 2 m geophone interval
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Test # 1
- Data are collected at Saudi Arabia- Two parallel lines are collected- The first is a conventional seismic profile, where geophones
are planted in the ground- The second is a land streamer survey
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1.5 m
Land Streamer
Shot Location
Conventional Seismic
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Trace Comparison
a) CSG # 74, Convention Seismic Data0
0.2
Tim
e (s)
93 153X (m)
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Trace Comparison
b) CSG # 74, Land Streamer Seismic Data0
0.2
Tim
e (s)
93 153X (m)
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Land Streamer Test
Test # 2Robotec Survey
Utah, USA
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Test # 2Robotic Land Streamer
- Data are collected at Utah, USA- One profile is collected with 10 CSGs- In each shot gather the land streamer moved 10 times to
give a total number of traces/shot gather of 231
Position 1 Position 2 Position 3 Position 10…………
Shot Loc.
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Test # 2CSG Sample
0.0
5500.0 17.56
X (m)
Sam
ple
Sample interval = 2 ms