REGIONAL EXPLORATION: Multi-attribute visualization reveals Lower Cretaceous gas reservoir
Subtle seismic anomaly in Viosca Knoll
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After 400 wells, subsalt drilling is shifting to turnkey status
Planning, synthetics, minimal casing
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Capital cost, use value, and payback for geoscience visualization systems
Immersive technologies the norm in five years
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Understanding seismic reflectors within shallow tabular salt
Distribution, origin in the Gulf of Mexico
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Intraslope basins reveal US Gulf of Mexico secrets
Deepwater depositional processes, lithology, seismic facies, stratigraphy
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GEOSCIENCES
The world is being tied more tightly together than ever before and data is moving closer to the interpreter's fingertips.
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Multi-client team sharpens imaging for Gulf Of Mexico subsalt play
PSDM data and 3D visualization
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Gulf of Mexico earth sciences applied to Nigerian deltas
Integration of geology, geophysics, paleontology
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Seismic interpretation, identification of shallow water flow potential
Using high-resolution 3D and 2D
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Parallel seismic processing work flows allow fast-track interpretation
Steep dips, subsalt complicate project
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Seismic volume interpretation provides answers before mapping process
Transitioning away from mapping
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Evolution of the geological model for the Lobster Field
Expansion through re-evaluation
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Geosciences
PGS completed two surveys in the North Sea for BP Amoco.
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Large patterns become predictive tools to define trends, reduce exploration risk
US Gulf syndepositional structures, tectonic provinces
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Gulf of Mexico basin depositional synthesis
Reservoir fairway prediction and exploration
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GEOSCIENCES
New input devices for virtual reality allow flexibility in image control (Images courtesy of GMD/IMK, Fakespace, Inc.). Figure 2 [7,747 bytes]. Fugro-Geoteam completed processing of the Manet Ridge 2D survey in the Norwegian North Sea [7,732 bytes].
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Marine geophones: noise suppression and seafloor coupling
Scanning electron micrograph of seabottom sediments at Teal South. Note dominance of platy minerals (clay-minerals, or muds) over sands. This is consistent with the soft water-bottom conditions at Teal South. Sandbag wrapped around receiver cable. Texaco engineer Robert Cross is verifying the geophone signal polarity prior to deployment [13,614 bytes]. Receiver gathers: hydrophone, east-west horizontal geophone, vertical geophone, north-south horizontal geophone [19,711 bytes].
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Forty-six wells designated subsalt in the Gulf of Mexico
Gulf of Mexico subsalt timeline [4,361 bytes] The 46 announced subsalt wells in the Gulf of Mexico. The shaded area represents the subsalt trend. [154,636 bytes] Subsalt celebrating crystal anniversary In 1983, Placid Oil drilled the first of what was to eventuate into one of the most profitable trends in the Gulf of Mexico with it's #2 well in Ship Shoal 266. This well was the first in what was to become known as the Gulf of Mexico subsalt trend.
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US Gulf subsalt anomalies result from focusing technique
Southwest to northeast cross-section from 3D prestack depth migration seismic data. Note the high amplitude reflectors below the salt peak (circled). 3D visualization of the model with top of salt (red to yellow horizon) and subsalt reflector (green to blue horizon) shown. White lines are raypaths to one reflection point on the subsalt reflector. [30,970 bytes] Raytrace modeling differentiates false indicators
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Anadarko uses subsalt know-how to beat the odds
The Rowan jackup rigs Odessa and Gilbert Rowe worked side by side during the testing of the Tanzanite subsalt well in the US Gulf of Mexico. The Tanzanite field, shown here, is Anadarko's latest subsalt success story in the Gulf of Mexico. [20,548 bytes]
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GEOSCIENCES
The M/V Polar Queen and M/V Geco Angler (shown) re-shot the original 1995 source pattern over Foinaven Field to produce its first 4D survey. Schlumberger Geco-Prakla's M/V Akademik Nemchinov is collecting a 1,850 km 2D survey for Vanco Energy offshore Morocco. [11,039 bytes] Anadarko Petroleum grabbed the spotlight with two recent subsalt discoveries: Tanzanite and Hickory in the Gulf of Mexico. Widely separated areally, both subsalt discoveries are on the shelf in just over 300 ft water
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Intense speculative 3D seismic spurred on by deepwater plans
Gulf of Mexico speculative 3D seismic programs available to industry. Due to overlapping surveys, some colors may not exactly match the contractor key (Map courtesy of Energy Graphics, Inc.). [164,577 bytes] Vicious market! Competitive, competitive! Very competitive! It is tough! Not for the faint of heart! These are just a few of the phrases used to describe competition between seismic contractors in the Gulf of Mexico, the most active market for speculative seismic in the world.
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Optimizing seismic operations on the Atlantic Margin
Areas in the Main Porcupine Basin have been extensively surveyed. [19,936 bytes] Pre-stack migration on Atlantic Margin. [97,678 bytes] Pre-stack migration on Atlantic Margin. [98,323 bytes] An 800-meter wide seismic survey swath allows high productivity. [22,581 bytes]
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Geoscience
With SeisWorks, a user can associate multiple reservoir properties with seismic attributes to uncover subtle reservoir information and probable hydrocarbons. [Courtesy Landmark Graphics] Western's Fractogram clearly illustrates fracture azimuth derived from the periodic amplitude variation of real P-wave data. [Courtesy Western Geophysical] 3D permeability realization of a North Sea field. [Courtesy British Gas]
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Geophysical imaging of subsalt geology
Davis W. Ratcliff, David J. Weber Diamond Geophysical Corp. A cross-section through the 3D velocity model after seven iterations An east-west 3D PreSDM profile with pore pressure superimposed on the seismic.
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1455 W. Loop South, STE. 400
