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Castagna-John

Dr. John Castagna, Professor

Department of Earth and Atmospheric Sciences, College of Natural Sciences and Mathematics

FACULTY WEBSITE


  • Areas of expertise

    • Exploration geophysics
    • Seismic attributes
    • Reservoir characterization
    • Spectral decomposition
  • Awards

    • Society of Explorational Geophysicists Outstanding Reviewer Award, 2010
    • The Leading Edge Best Paper Award, 2010
    • Geophysical Society of Houston Honorary Life Membership
  • Publications

    • Puryear, C., Portniaguine, O., Cobos, C., and Castagna, J. P., 2012, Constrained least squares spectral analysis: Geophysics, November
    • Zhang, R., and Castagna, J. P., 2011, Thin-layer reflectivity inversion using basis pursuit decomposition, Geophysics, December
    • Nguyen, T., and Castagna, J. P., 2010, High resolution reflectivity inversion: Journal of Seismic Exploration, V. 19, No. 4, October
    • Fa, L., Castagna, J.P., Zeng, Z., Brown, R.L., and Zhao, M. 2010. Effects of anisotropy on time depth relation in transversely isotropic medium with a vertical axis of symmetry: Chinese Science Bulletin, Vol. 55, No. 21:2243-2251.
    • Liao, Q., Kouri, D., Nanda, D., and Castagna, J. P., 2011, Automatic first break detection by spectral decomposition using minimum uncertainty wavelets, SEG, Expanded Abstracts, 1637- 1631
    • Zhang, R., and Castagna, J. P., 2011, Sparse layer inversion with basis pursuit decomposition, SEG, Expanded Abstracts, 2571-2585
    • Benabentos, M., and Castagna, J. P., 2011, Density estimate from well log data using a diagenetic rock model, SEG, Expanded Abstracts, 2094-2098
    • Chopra, S., and Castagna, J. P., 2013, Amplitude Variation With Offset, Developments in Geophysics Series, Society of Exploration Geophysicists (accepted, copy editing complete)
    • Lee, G, and Castagna, J. P., 2007, Untested carbonate buildups in the Bermejo Field, Eduador: A potential new play type in the Oriente Basin: AAPG Bulletin, 95(2), pp. 135-149
    • Chopra, S., Castagna, J. P., Xu, Y., and Tonn, R., 2007, Thin bed reflectivity inversion and seismic interpretation: SEG Expanded Abstracts
  • Patents

    • Method and apparatus for measuring formation compression and shear wave velocity, 10/20/1987
    • Instantaneous spectral analysis, 01/10/2006
    • Determination of fluid properties of earth formations using stochastic inversion, 07/09/2003
  • Funded Research

     

    Not available

  • Curriculum Vitae

     

    JOHN PATRICK CASTAGNA

    Residence: 706 Hawthorne Unit C, Houston, TX 77006

    EDUCATION

    1983 Ph.D., University of Texas at Austin, Exploration Geophysics

    1981 M.A., Brooklyn College, Geochemistry

    1976 B.S., Brooklyn College, major in Geology, minor in Chemistry

    PERSONAL INFORMATION

    Two children. 56 years old.

    EXPERIENCE

    2004-present Professor and Sheriff Chair, University of Houston, Director, Center for Applied

    Geophysics (CAGE)

    2000-2004 President, Fusion Geophysical

    1996-2004 Professor and McCollough Chair in Geology and Geophysics; Director, Institute for

    Exploration and Development Geosciences, University of Oklahoma;

    1995-1996 Dual appointment as Senior Principal Research Geophysicist for ARCO

     Exploration and Production Technology, and Visiting Research Scientist at the

     Geotechnology Research Institute of the Houston Advanced Research Center.

    1994-1995 Principal Geophysicist, ARCO International Oil and Gas Co.

    1990-1994 Principal Geophysicist, Vastar Resources (a subsidiary of ARCO)

    1989-1990 Manager, Seismic Analysis Research, ARCO Oil and Gas Co.

    1988-1989 Director, Geoseismic Interpretation Research, ARCO Oil and Gas Co.

    1987-1988 Technical Coordinator, Rock Physics Research, ARCO Oil and Gas Co.

    1986 Log Analyst, Reservoir Engineering Services, ARCO Oil and Gas Co.

    Responsible for formation evaluation and reservoir characterization.

    1982-1985 Technical Coordinator, Sonic Logging Research, ARCO Oil and Gas Co.

    1980-1981 Sr. Res. Geophysicist, Well Logging Research, ARCO Oil and Gas Co.

    MISCELLANEOUS

    1999 First Vice-President of the Society of Exploration Geophysicists

    1998-1997 Chairman, The Leading Edge Editorial Board

    1996-1995 SEG Distinguished Lecturer

    Received Best Paper Award 2001 The Leading Edge

    Technical Program Chairman 2003 SEG Meeting, Dallas,

    Technical Program Chairman 2009 SEG Meeting, Houston

    Received SEG Reginald Fessenden Award

    Received GSH Honorary Life Membership

    Received SEG 2010 Outstanding Reviewer Award

    RECENT PUBLICATIONS

    Puryear, C., Portniaguine, O., Cobos, C., and Castagna, J. P., 2012, Constrained least squares spectral

    analysis: Geophysics, November

    Zhang, R., and Castagna, J. P., 2011, Thin-layer reflectivity inversion using basis pursuit decomposition,

    Geophysics, December

    Nguyen, T., and Castagna, J. P., 2010, High resolution reflectivity inversion: Journal of Seismic

    Exploration, V. 19, No. 4, October

    Fa, L., Castagna, J.P., Zeng, Z., Brown, R.L., and Zhao, M. 2010. Effects of anisotropy on time depth

    relation in transversely isotropic medium with a vertical axis of symmetry: Chinese Science

    Bulletin, Vol. 55, No. 21:2243-2251.

    Liao, Q., Kouri, D., Nanda, D., and Castagna, J. P., 2011, Automatic first break detection by

    spectral decomposition using minimum uncertainty wavelets, SEG, Expanded Abstracts, 1637-

    1631

    Zhang, R., and Castagna, J. P., 2011, Sparse layer inversion with basis pursuit decomposition,

    SEG, Expanded Abstracts, 2571-2585

    Benabentos, M., and Castagna, J. P., 2011, Density estimate from well log data using a

    diagenetic rock model, SEG, Expanded Abstracts, 2094-2098

    Chopra, S., and Castagna, J. P., 2013, Amplitude Variation With Offset, Developments in

    Geophysics Series, Society of Exploration Geophysicists (accepted, copy editing complete)

    OLDER PUBLICATIONS

    Lee, G, and Castagna, J. P., 2007, Untested carbonate buildups in the Bermejo Field, Eduador: A potential

    new play type in the Oriente Basin: AAPG Bulletin, 95(2), pp. 135-149

    Castagna, J. P., 2007, On the use of seismic data in reservoir characterization: in D. J. O’Meara, ed.,

    Reservoir Characterization, PennWell

    Chopra, S., Castagna, J. P., Xu, Y., and Tonn, R., 2007, Thin bed reflectivity inversion and seismic

    interpretation: SEG Expanded Abstracts

    Dwan, F., Portniaguine, O., Sparkman, G., Burnett, M., and Castagna, J. P., 2007, High-Resolution

    Geological Visualization Using Spectral Inversion: Offshore Technology Conference OTC-18951-PP

    Chopra. S, and Castagna, J. P., 2007, Thin Bed Reflectivity Inversion and Seismic Interpretation: CSEG

    Expanded Abstracts, 524-527 and SEG Expanded Abstracts, n. 1, 1923-1927

    Calderon, J., and Castagna, J. P., 2007, Porosity and lithologic estimation using rock physics and multiattribute

    transforms in Balcon Field, Colombia: The Leading Edge, 26, 142

    Lin, F, and Castagna, J., 2008, An accurate and fast algorithm of calculating R/T coefficients; China

    Science Magazine (indexed by SCI ).

    Puryear, C., and Castagna, J. P., 2008, Layer thickness determination and stratigraphic interpretation using

    spectral inversion: Theory and application: Geophysics, 73, R37

    Puryear, C., Tai, S., Castagna, J., Masters, R., and Dwan, F., 2008, Comparison of frequency attributes from

    CWT and MPD spectral decompositions of a complex turbidite sand model: SEG Expanded Abstracts

    Zhang, R., and Castagna, J. P., 2008, Checkshot-sonic microscale tomography: SEG Expanded Abstracts

    Rojas, M., Castagna, J. P., Krishnamurti, R., Han, D., and Tutuncu, A., 2008, Shear-thinning behavior of

    heavy oil samples: SEG Expanded Abstracts

    Chopra, S, and Castagna, J., 2008, Thin-bed reflectivity – an aid to seismic interpretation: CSEG, Expanded

    Abstracts

    Chopra. S, and Castagna, J. P., 2009, Thin Bed Reflectivity Inversion: First Break

    Chopra, S., Castagna, J.P., and Xu., Y., 2009, Relative acoustic impedance application for thin-bed

    reflectivity inversion: SEG Expanded Abstracts

    Gassiyev, A., and Castagna, J. P., 2009, Mixing models and frame moduli bounds in complex lithologies:

    SEG Expanded Abstracts

    Tai, S., Puryear, C., and Castagna, J. P., 2009, Local frequency as a direct hydrocarbon indicator: SEG

    Expanded Abstracts

    Cuesta, J., Perez, R., Hernandez, F., Carrasquel, W., Cabrera, R., Moreno, C., and Castagna, J. P., 2009,

    The use of seismic attributes and spectral decomposition to support the drilling plan of the UrucoaBombal

    fields: SEG Expanded Abstracts

    Berryman. J., Ecker, C., and Castagna, J. P., 2006, Elasticity of porous media, translation of classic paper

    by F. Gassmann, in M. A. Pelissier, ed., Classics in Elastic Wave Theory, Society of Exploration

    Geophysicists

    Fa, L., Brown, R.L., and Castagna, J. P., 2006, Anomalous postcritical refraction behavior for certain

    transversely isotropic media: J. Acoust. Soc. Am. 120 (6), pp.3479-3492

    Sinha, S., Routh, P. S., Anno, P. D., and Castagna, J. P., 2005, Spectral decomposition of seismic data with

    continuous-wavelet transform: Geophysics 70, P19 - P25

    Chen, H., Brown, R. L., and Castagna, J. P., 2005, AVO for one- and two-fracture set models: Geophysics

    70, C1- C5

    Li, J., and Castagna, J., 2004, Support Vector Machine (SVM) pattern recognition for AVO classification,

    Geophysical Research Letters, Vol., 31

    Saleh, A. A., and Castagna, J. P., 2004, Revisiting the Wyllie time-average equation in the case of nearspherical

    pores, Geophysics, v. 69, no. 1

    Lin, F., Castagna, J. P., Suarez-Rivera, R., and Sun. P., 2003, An acoustic-logging transmission-network

    model (continued): Addition and multiplication ALTNs: J. Acoust, Soc. Am., 113 (5), May 2003

    Mahob, P.N. and Castagna, J. P., 2003, AVO polarization and hodograms: AVO strength and polarization

    product: Geophysics, 68, 849-862.

    Doherty, P. D., Soreghan, G. S, and Castagna, J. P., 2002, Outcrop-based reservoir characterization: A

    composite phylloid-algal mound, western Orogrande basin (New Mexico), AAPG Bulletin, v. 86, pp.

    779-795

    Lin, F., Castagna, J. P., Hovem, J. M., and Dong, D., 2002, An acoustic-logging transmission network

    model: J. Acoust. Soc. Am., v. 111, no. 5, pp. 2158 – 2165

    White, L, and Castagna, J. P., 2002, Stochastic fluid modulus inversion: Geophysics, 67, No. 12

    Castagna, J. P., 2001, Recent advances in seismic lithologic analysis, Geophysics, 66, 42

    Chen, H., Castagna, J. P., Brown, R. L., and Ramos, A. C. B., 2001, Three-parameter AVO crossplotting in

    anisotropic media, Geophysics 66, 1359

    Ramos, A.C.B., and Castagna, J. P., 2001, Useful approximations for converted-wave AVO, Geophysics

    66, 1721

    Sarkar, D., Castagna, J. P., and Lamb, W. J., 2001, AVO and velocity analysis, Geophysics, 66, 1284

    Castagna, J. P., and Hooper, J., 2000, A Simple Model for Saturation Curve Fitting: SEG Annual

    Convention, Calgary

    Chen, H. and Castagna, J. P., 2000, Anisotropic effects on full and partial stacks: Geophysics, V. 65, No.

    4, p. 1028

    Fa, L., Castagna, J. P., and Dong, D., 2000, Directivity and reciprocity analysis of array sonic logging

    transmission network: Online Symposium for Electronics Engineers, Proceedings, V. 1

     

    Gallice, F., Castagna, J. P., Doherty, P., Soreghan, L., Sondergeld, C., and Rai, C., 2000, Ultrasonic

    Velocity Measurements in Carbonate Algal Mound Samples, Orogrande Basin, New Mexico: SEG

    Annual Convention, Calgary

    Huffman, A., and Castagna, J. P., 2000, Rock physics and mechanics considerations for shallow water flow

    characterization: OTC-11974, Offshore Technology Conference, May 2, Houston

    Liu, Z., and Castagna, J., 2000, Wavelet Extraction and Seismic Modeling Using Neural Networks: SEG

    Annual Convention, Calgary

    Mahob, P., and Castagna, J. P., 2000, Fluid Substitution and Shear-Wave Velocity Prediction Including

    Dispersion Effects: A Case Study, NW Shelf, Australia: SEG Annual Convention, Calgary

    Nguyen, T., and Castagna, J., 2000, Matching Pursuit of Two-Dimensional Seismic Data and Its Filtering

    Application: SEG Annual Convention, Calgary

    Poth, L., and Castagna, J. P., 2000, Using AVO Inversion Techniques to Model an Amplitude Anomaly

    Prior to Drilling: SEG Annual Convention, Calgary

    Samake, D., Castagna, J. P., and Mahob, P., 2000, Stochastic Fluid Substitution and Seismic Modeling:

    SEG Annual Convention, Calgary

    Sun, Q., Castagna, J. P., and Liu, Z., 2000, AVO Inversion by Artificial Neural Networks: SEG Annual

    Convention, Calgary

    Sun, S., and Castagna, J. P., 2000, Attenuation Estimation From Vertical Seismic Profile Data: SEG Annual

    Convention, Calgary

    Batzle, M. L., Han, D. H., and Castagna, J. P., Fluids and Frequency Dependent Seismic Velocity of

    Rocks: 1999 Annual SEG Convention, Houston, Texas, pp. 5-8

    Castagna, J. P., 1999, Recent Advances in Exploration Geophysics, Geotimes, January (invited paper)

    Castagna, J. P., 1999, Velocity Dispersion – How Significant Is It?: presented at Houston Advanced

    Research Center Geotechnology Research Institute Symposium (May) and at the OU Geophysical

    Reservoir Characterization Consortium Annual Meeting (September)

    Castagna, J. P., O’Meara, D., Ucan. S., Cranganu, C., and Batzle, M. M., 1999, Rock Physics Basis for

    Seismic Time-Lapse Monitoring, invited keynote presentation, 1999 SEG Development and Production

    Forum, Kananaskis, Canada. Selected by the organizers as one of the best papers and presented again at

    1999 SEG Annual Convention Workshop review of D&P forum.

    Chen, H., Castagna, J. P., Brown, R. L., and Ramos, A. C. B., 1999, Three-Parameter AVO Crossplotting

    in Anisotropic Media: 1999 Annual SEG Convention, Houston, Texas, pp. 73-76

    Chen, H., and Castagna, J. P., 1999, Study of Anisotropic Effects on Full and Partial Stacks: 1999

    Annual SEG Convention, Houston, Texas. Pp. 1892-1895

    Huffman, A., and Castagna, J. P., 1999, Rock Physics and Mechanics Considerations for Shallow Water

    Flow Characterization, 1999 Int. Forum on Shallow Water Flows, Oct., League City, TX

    Sarkar, D., Castagna, J. P., and Lamb, W. J., 1999, AVO and Velocity Analysis: 1999 Annual SEG

    Convention, Houston, Texas, pp. 840-842

    Lin, F., Castagna, J. P., and Hovem, J. M., 1999, Derivation and Simulation of Source Function

     Acoustic Logging: 1999 IEEE International Ultrasonics Symposium, Lake Tahoe, Nevada

    Liu, Z., and Castagna, J. P., 1999, The Impulse Response of BP Neural Networks and Seismic Wavelet

    Extraction: International Neural Network Society, IJCNN’99, July, Washington D. C.

    Liu, Z., and Castagna, J. P., 1999, Avoiding Overfitting Caused by Noise with Uniform Training Mode:

    International Neural Network Society, IJCNN’99, July, Washington D. C.

    Mahob, P., Castagna, J. P., Young, R, 1999, AVO Inversion of a Gulf of Mexico Bright Spot – A Case

    Study: Geophysics, v. 64, No. 5, 1480-1491

    O’Meara, D. J., Jalfin, G., and Castagna, J. P., 1999, Feedback from 3D Geomodeling and Log- Derived

    Capillary Pressure Functions Leads to Improved Well Log Interpretation, In Situ Permeability

    Estimates, and More Accurate Volumetrics: 1999 Landmark World-Wide Forum, Houston, Texas

    Castagna, J. P., Swan, H. W., and Foster, D., 1998, Framework for Interpretation of AVO gradient and

    intercept: Geophysics, May

    Bork, J., Yin, C., Castagna, J., Karazincir, H., and Wood, L., 1997, An investigation into unusual AVO

    signatures in the Gulf of Mexico and Trinidad: presented at 67th Annual International Meeting, Society of

    Exploration Geophysicists

    Castagna, J. P., 1997, Permeability determination using acoustic logs: presented at Advances in Seismic

    Technologies, Consortium for Emerging Gas Resources in the Greater Green River Basin, Denver,

    11/11/97

    Castagna, J. P., and O’Meara, D., 1997, On the feasibility of seismic waterflood monitoring: Statoil

    Research Symposium, 9/12/97

    Castagna, J. P., and O’Meara, D., 1997, Reservoir Characterization: white paper for Energy

    Research Clearinghouse and Reservoir Recovery Forum, 85 pp.

    Castagna, J. P. and Swan, H. W., 1997, Principles of AVO crossplotting: The Leading Edge, Reprinted in

    Applications of Emerging Technologies, Unconventional Methods in Exploration for Petroleum and

    Natural Gas V, Proceedings, Institute for the Study of Earth and Man, SMU University. Also presented at

    Society of Professional Well Log Analysts Multidiscipline Low Contrast Pay Symposium, 5/15/97, New

    Orleans, and AAPG 1997 Mid-Continent Section Meeting, Oklahoma City

    Mahob, P. N., Young, R., and Castagna, J. P., 1997, The effect of Radon filtering on a Central Gulf of

    Mexico AVO Anomaly: presented at 67th Annual International Meeting, Society of Exploration

    Geophysicists

    Sparkman, G., and Castagna, J. P., 1997, Time-lapse reservoir monitoring and characterization: presented at

    AAPG Annual Convention, 4/9/97

    Castagna, J. P., 1996, Seismic reservoir monitoring economics: presented at 66th Annual International

    Meeting, Research Workshop, Society of Exploration Geophysicists

    Castagna, J. P., Sparkman, G., and Gobran, B., 1996, Seismic time-lapse monitoring: white paper for

    Energy Research Clearinghouse, 85 pp.

    Batzle, M. L., Han, D. H., and Castagna, J. P., 1995, Fluid effects on bright spot and

     AVO analysis: presented at 65th Annual SEG Meeting, 1119-1121. Also presented at

     SEG Summer Research Workshop, Vail, Co.

    Castagna, J. P., 1995, Applied AVO analysis: use and abuse of amplitude variation with

     offset. Fall 1995 SEG Distinguished Lecture.

    Castagna, J. P., Batzle, M. L., and Han, D. H., 1995, Issues in rock physics and

     implications for DHI interpretation: presented at 1st Conference of the Union of Latin

     American Geophysicists, 575-577, invited paper. Also published in The Leading Edge,

     14, 883-885

    Castagna, J. P., Swan, H. S., Foster, D. L., and Peddy, C. A., 1995, Framework for

     interpretation of AVO intercept and gradient: submitted to Geophysics

    Castagna, J. P., 1994, Communication, integration, and the next geophysical frontier: The

     Leading Edge, 13, 32-36

    Castagna, J. P., and Foster, D. L., 1994, Critical aspects of AVO analysis: presented at 7th

     Annual Venezuelan Geophysical Congress, invited session keynote address

    Castagna, J. P., and Smith, S. W., 1994, Comparison of AVO indicators: a modeling

     study: Geophysics, 59, 1849-1855. Presented at 63rd Annual SEG Meeting,

     Received honorable mention for best presentation. Invited paper at 10th Annual Gulf

     Coast SEG Meeting

    Pan, G. S., Young, C. Y., and Castagna, J. P., 1994, An integrated target-oriented

    prestack elastic waveform inversion: sensitivity, calibration, and application:

     Geophysics, 59, 1392-1404. Also presented at 63rd Annual SEG Meeting

    Castagna, J. P., 1993, Petrophysical imaging using AVO: The Leading Edge, 12, 172-178,

     invited paper

    Castagna, J. P., 1993, Amplitude-versus-offset analysis; tutorial and review: in J. P.

     Castagna and M. M. Backus, Eds., Offset-Dependent Reflectivity - Theory and Practice

     of AVO Analysis, Society of Exploration Geophysicists

    Castagna, J. P., and Backus, M. M., Eds., 1993, Offset-Dependent Reflectivity - Theory

     and Practice of AVO Analysis: Society of Exploration Geophysicists

    Castagna, J. P., Batzle, M. L., Gaiser, J. E., Tubman, K. M., and Burnett, M. L., 1993,

     Shear-wave velocity control: in J. P. Castagna and M. M. Backus, Eds., Offset-

     Dependent Reflectivity - Theory and Practice of AVO Analysis, Society of Exploration

     Geophysicists

    Castagna, J. P., Batzle, M. L., and Kan, T. K., 1993, Rock physics; the link between rock

     properties and AVO response: in J. P. Castagna and M. M. Backus, Eds., Offset-

     Dependent Reflectivity - Theory and Practice of AVO Analysis, Society of Exploration

     Geophysicists

    Hong, M. R., Castagna, J. P., and Sicking, C. J., 1993, A model-based analysis of

     amplitude-versus-offset variation of land seismic data: in J. P. Castagna and M. M.

     Backus, Eds., Offset-Dependent Reflectivity - Theory and Practice of AVO Analysis,

     Society of Exploration Geophysicists

    Castagna, J. P., 1992, Petrophysical basis for AVO analysis: presented at the Joint

     SEG/EAEG Summer Research Workshop. How Useful is AVO Analysis?, 371-372,

     invited paper

    Castagna, J. P., 1992, Velocity equations for AVO analysis: presented at the Joint

     SEG/EAEG Summer Research Workshop. How Useful is AVO Analysis?, 377-384.

     Selected as one of 10 best summer workshop papers and invited for presentation as a

     poster paper at the 62nd Annual SEG Meeting

    Greenberg, M. L., and Castagna, J. P., 1992, Shear-wave velocity estimation in porous

     rocks; theoretical formulation, preliminary verification and applications: Geophysical

     Prospecting, 40, 195-209

    Lamb, W. J., Zhu, X., McMechan, G. A., Greenberg, M. L., and Castagna, J. P., 1992,

     Elastic wave propagation in composite media: Geophysics, 57, 1155-1165

    Castagna, J. P., 1991, Seismic lithology overview: presented at 61st Annual SEG Meeting,

     paper SL 2.1, 1051-1053, invited paper

    Pan, G. S., Young, C. Y., and Castagna, J. P., 1991, Sensitivity and resolution of an

     integrated target-oriented prestack elastic inversion: presented at 60th Annual SEG

     Meeting, paper SI 3.2, 1173-1176

    Greenberg, M. L., Lamb, W. J., and Castagna, J. P., 1990, Porosity and lithology

     estimation from elastic rock parameters: presented at EAEG/SEG Research Workshop,

     Cambridge, England, paper 6.06, 360-363

    Greenberg, M. L., Popa, M. L., Phillips, R. L., and Castagna, J. P., 1990, Estimation of

     shear-wave velocity logs from conventional well logs: presented at EAEG/SEG

     Research Workshop, Cambridge, England, paper 4.10, 283-286

    Song, Y. Y., Castagna, J. P., Black, R. A., and Knapp, R. W., 1989, Sensitivity of near-

     surface shear-wave velocity determination from Rayleigh and Love waves: presented at

     59th Annual SEG Meeting, paper POS 5.10, 509-512

    Castagna, J. P., 1987, Method and apparatus for measuring formation compressional and

     shear-wave velocity, U. S. Patent No. 4,701,891, October 20, 1987

    Castagna, J. P., Zucker, S. M., and Shoberg, T. G., 1987, Permeability indication with

     conventional sonic waveforms: presented at SPWLA 28th Annual Logging Symposium,

     paper MM

    Eastwood, R.L., and Castagna, J. P., 1987, Interpretation of Vp

    /Vs

    ratios from sonic logs in Shear-wave

    Exploration, S. H. Danbom and S. N. Domenico, Eds., 139-153

    Castagna, J. P., 1985, Accuracy and limitation of sonic log and VSP measurements for

     seismic exploration: presented at 55th Annual SEG Meeting, paper RS3, 281-283,

     invited paper

    Castagna, J. P., 1985, Shear-wave time-average equation for sandstones: presented at

     55th Annual SEG Meeting, paper S10.2, 447-449

    Castagna, J. P., Batzle, M. L., and Eastwood, R. L., 1985, Relationships between

     compressional-wave and shear-wave velocities in clastic silicate rocks: Geophysics, 50,

     571-581. Reprinted in Geophysics II, Tools for Seismic Interpretation, Treatise of

     Petroleum Geology, American Association of Petroleum Geologists. Also reprinted in

    1. M. Nur, and Z. Wang, editors, Seismic and Acoustic Velocities in Reservoir Rocks,

     Volume I, Society of Exploration Geophysicists. Also presented at 53rd Annual

     SEG Meeting, paper S13.1, 582-584, and invited paper at the 1st Gulf Coast SEG

     Meeting

    Castagna, J. P., 1984, Digital processing improves sonic log reliability: World Oil, April,

     71-74, invited paper

    Goldberg, D. S., Gant, W. T., Siegfried, R. W., and Castagna, J. P., 1984, Processing and

     interpretation of sonic log waveforms - a case study: presented at 54th Annual SEG

     Meeting, paper BHG 2.4, 28-29

    Goldberg, D. S., Kan, T. K., and Castagna, J. P., 1984, Attenuation measurements from

     sonic log waveforms: presented at SPWLA 25th Annual Logging Symposium, paper NN

    Anderson, R. G., and Castagna, J. P., 1984, Analysis of sonic log compressional-wave

    amplitudes using borehole compensation techniques: SPWLA 25th Annual Logging

    Symposium, paper K

    Castagna, J. P., 1983, Prediction of Fe-Mg site occupancies in pigeonite: Geophysical

     Research Letters, 10, 137-139

    Castagna, J. P., 1983, Full-waveform sonic log processing: presented at 53rd Annual SEG

     Meeting, Sonic Logging Workshop, invited paper

    Castagna, J. P., and Gaiser, J. E., 1983, Quality sonic logs for seismic applications:

     presented at 53rd Annual SEG Meeting, paper BHG2, 2-5

    Castagna, J. P., and Gaiser, J. E., 1983, Improved seismic ground truth from sonic logs:

     presented at SPWLA 24th Annual Logging Symposium, paper NN

    Eastwood, R. L., and Castagna, J. P., 1983, Basis for interpretation of Vp

    /Vs

    ratios in

     complex lithologies: presented at SPWLA 24th Annual Logging Symposium, paper G.

     Reprinted in Geophysics II, Tools for Seismic Interpretation, Treatise of Petroleum

     Geology, American Association of Petroleum Geologists

    Castagna, J. P., and Sicking C. J., 1982, Sonic log error recognition and correction by

     Wiener interpolation: presented at 52nd Annual SEG Meeting, paper L1.8, 325-327

    Siegfried, R. W., and Castagna, J. P., 1982, Methods for the analysis of sonic log

     waveforms: presented at SPWLA 23rd Annual Logging Symposium

    Castagna, J. P., 1981, Energetics of garnet-clinopyroxene equilibrium reactions: Master's

     Thesis, Brooklyn College of C.U.N.Y.

    Castagna, J. P., Anderson, R. A., and Brock, D., 1981, Shear waves on sonic log

     waveforms: presented at 51st Annual SEG Meeting, paper S11.6, 69-70

    Castagna, J. P., Anderson, R. A., and Simmons, J., 1981, Compressional-wave amplitude

     logging: presented at 51st Annual SEG Meeting, paper S11.5, 69

    Backus, M. M., Castagna, J. P., and Gregory, A. R., 1979, Sonic log waveforms from

     geothermal well, Brazoria Co., Texas: presented at 49th Annual SEG Meeting

    Castagna, J. P., 1979, Application of the simple mixture model to garnet and

    clinopyroxene solutions: EOS, Transactions, American Geophysical Union, 60, 404

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