APPLICATIONS OF TECHNOLOGY:
- Search for and contouring of gas and oil deposits
- Underground water reservoir imaging
- Estimation of the size and shape of contamination zones
- Monitoring of underground liquid and gas storage
- CO2 sequestration problem
- Allows characterization of subsurface fluid reservoirs in situations where other approaches fail
- Improves imaging of thin, porous saturated layers
- Substantially improves the accuracy of imaging of any porous rocks using surface and/or borehole seismic measurements
- Enables differentiation between oil and water
- 80% success rate with a variety of data sets
Thin porous layers are effectively invisible to current seismic methods used for reservoir imaging. Since gas and oil deposits are usually attributed to fluid-saturated porous layers, Gennady Goloshubin and Valeri Korneev have developed an imaging method that provides a more accurate determination of saturation character for subsurface reservoirs. Berkeley Lab’s new technique that takes into account a low frequency seismic response will allow improved imaging of thin porous liquid saturated layers (containing gas, water, oil, etc.), and substantially improve the accuracy of imaging of any porous rocks using surface and/or borehole seismic measurements.
Use of seismic low frequencies has strong potential for prognoses of fluid content and mapping of productive highly permeable zones of reservoirs. The low-frequency effects are especially important when no noticeable fluid signature is found in the high-frequency domain of seismic reflections from the oil-saturated reservoirs. Frequency-dependent seismic imaging allows the characterization of the subsurface fluid reservoirs in situations where other approaches fail.
To date, the low frequency imaging approach has been applied to a variety of data sets. It worked well in about 80% of the cases, while in other cases the interpretation outcome was uncertain. The limits and conditions of the method need to be further investigated so that the imaging procedure can be adapted to each case depending on the geology, data quality, frequency content, etc.
This technique will find applications in the search for and contouring of gas and oil deposits, as well as in underground water reservoir imaging, estimation of the size and shape of contamination zones, monitoring of underground liquid and gas storage, and, generally, in the global CO2 sequestration problem.
- Available for licensing;
- U.S. Patent #6,941,227 and Published Patent Application
To learn more about licensing a technology from LBNL see here.
FOR MORE INFORMATION:
Korneev, V.A., Goloshubin, G.M., Daley, T.M., Silin, D.B., “Seismic Low-Frequency Effects in Monitoring Fluid-Saturated Reservoirs,” Geophysics, Vol 69, No. 2, March-April 2004, pg 522-532
Korneev, V., “Slow Waves in Fractures Filled with Viscous Fluid,” Geophysics, Vol. 73, No. 1, 2008, N1-N7
Goloshubin, G., VanSchuyver, C., Korneev, V., Silin, D., Vangalov, V., “Reservoir Imaging Using Low Frequences of Seismic Reflections,”The Leading Edge, 2006, 527-531
Castagna, J.P., Sun, S., Siegfried, R.W., “Instantaneous Spectral Analysis: Detection of Low-Frequency Shadoes Associated With Hydrocarbons,” The Leading Edge, February, 2003, 120-127
Odebeatu, E., Zhang, J., Chapman, M., Liu, E., Li, X., “Application of Spectral Decomposition to Detection of Dispersion Anomalies Associated with Gas Saturation,”The Leading Edge, 2006, 206-210
Silin, D.B., Korneev, V.A., Goloshubin, G.M., Patzek, T.W., “Seismic Reflection From a Fluid-Saturated Medium,” 2004, 1-27
Goloshubin, G.M., Silin D.B., “Dual Porosity Bio-Barenblatt Model,” EAGE 68th Conference & Exhibition, Vienna, Austria, 2006
Goloshubin, G.M., Silin, D., “Frequency-Dependent Seismic Reflection From a Permeable Boundary in a Francture Reservoir, ” SEG/New Orleans Annual Meeting, 2006
Goloshum, G., Silin, D., “Using Frequency-Dependent Seismic Attributes in Imaging of a Fractured Reservoir Zone,” SEG 2005
Korneev, V.A., Silin, D., Goloshubin, G.M., Vingalov, V., “Seismic Imaginig of Oil Production Rate,” SEG Int’l Expostion and 74th Annual Meeting, Denver, Colorado, 2004
“Offshore Petroleum Exploration Opportunities On Offer in Australia,” PESA NEWS, Australia in Focus, October/November 2006, 1-5
REFERENCE NUMBER: IB-1663
SEE THESE OTHER BERKELEY LAB TECHNOLOGIES IN THIS FIELD:
Gas Exploration Software for Reducing Uncertainty in Gas Concentration Estimates, CR-2342