Publications/Patents

Mark at beergarten

Publications

Biju-Duval, et al, 1981, Premiers resultants des forages IPOD implantes lors de la croisiere 78 A du Glomar Challenger aunord-est de la ride de la Barbade, Compte Rendu Acad. Sciences Paris, t. 293.

Cheng, C., Toksöz, M.N. and Willis, M.E., 1982, Determination of in situ attenuation from full waveform acoustic logs, J. of Geophy. Res., 87, n B7.

Willis, M.E., 1983, Seismic velocity and attenuation from full waveform acoustic logs: PhD thesis, MIT, Cambridge MA.

Willis, M.E. and Toksöz, M.N., 1983, Automatic P and S velocity determination from full waveform digital acoustic logs, Geophysics 48, 1631-1644, doi:10.1190/1.1441444.

Toksöz, M.N, Cheng, C.H. and Willis, M.E., 1984, Seismic waves in a borehole – a review, in Vertical Seismic Profiling Part B Advanced Concepts Vol 14B, Geophysical Press, London.

Scott, I. Clark, D, and Willis, M.E., 1999, Optimizing demultiple parameter selection, The Leading Edge 18(24).

Dutta, N., Hope, R., Tittle, W., Willis, M., Ireson, D., Leaney, S. and Meyer, J., 1998, Seismic integration to reduce risk: Schlumberger Oil Field Review, Fall Ed.

Willis, M. E., Burns, D. R., Rao, R., Minsley, B., Toksöz, M. N. and Vetri, V., 2006, Spatial orientation and distribution of reservoir fractures from scattered seismic energy, Geophysics 71, O43, doi:10.1190/1.2235977.

Willis, M. E., R. Lu, X. Campman, M. N. Toksöz, Y. Zhang, and M. V. de Hoop, 2006, A novel application of time reverse acoustics: salt dome flank imaging using walk away VSP surveys, Geophysics, 71(2), A7-A11, 2006, doi:10.1190/1.2187711.

Willis, M.E., Lu, R., Burns, D.R., Toksöz, M.N. and House, N. 2007, Fracture quality from integrating time-lapse VSP and microseismic data, The Leading Edge, 26(9), doi:10.1190/1.2780791.

Burns, D.R., Willis, M.E., and Toksöz, M.N. 2007, Fracture properties from seismic scattering, The Leading Edge, 26(9), doi:10.1190/1.2780790.

Lu, R., Willis, M.E., Campman, X., Ajo-Franklin, J. and Toksöz, M.N., 2008, Redatuming through a salt canopy and target oriented salt flank imaging, Geophysics 73, 63-71 doi:10.1190/1.2890704.

Lu, R., Willis. M. E., Campman, X., and Toksöz, M.N., 2009, Evaluation of Elastodynamic interferometric redatuming: a synthetic study on salt dome flank imaging, Geophys. J. Int. 176(3), 889-896, doi: 10.1111/j.1365-246X.2008.04019.x.

Willis, M. E., Lu, R., Campman, X., Toksöz, M. N. , Zhang, Y., and de Hoop, M. V., 2008, In Chapter 6: Imaging: A novel application of time reverse acoustics: salt dome flank imaging using walk away VSP surveys (pp. 605-609), Geophysical Reprint Series No. 26, Seismic Interferometry: History and Present Status, SEG. ISBN: 978-1-56080-150-4

Poliannikov, O. and Willis, M.E., 2011, Interferometric correlogram-space analysis, Geophysics 76, P.SA9-17, doi 10.1190/1.3519875.

Blum, T.E., K. van Wijk, R. Snieder, and M.E. Willis, 2011, Laser excitation of a fracture source for elastic waves, Physical Review Letters 107, 275501, doi: 10.1103/PhysRevLett.107.275501.

Blum, T.E., Sneider, R., van Wijk, K., and Willis, M.E., 2011, Theory and laboratory experiments of elastic waves scattered by dry planar fractures, JGR 116 (B8), DOI: 10.1029/2011JB008295.

Willis, M.E., 2012, Integrating time-lapse VSP, microseismic monitoring enables frac movies, American Oil & Gas Reporter, December. http://www.aogr.com/index.php/magazine/editors-choice/integrating-time-lapse-vsp-microseismic-monitoring-enables-frac-movies

Shemeta, J., B. Goodway, M. Willis, and W. Heigl, 2012, Introduction to this special section: passive seismic and microseismic – part 2, The Leading Edge, 21, no 12, 1428-1435.

Forghani-Arani, F. M. Batzle, J. Behura, M. Willis, S. Haines, and M. Davidson, 2012, Noise suppression in surface microseismic data, The Leading Edge, 31 no 12, 1496-1501.

Stewart, R.R, N. Dyaur, B. Omoboya, J.J.S. de Figueiredo, M.E. Willis and S. Sil, 2013, Physical modeling of anisotropic domains: ultrasonic imaging of laser-etched fractures in glass, Geophysics 78, 1-9, doi: 10.1190/GEO2012-0075.1

Forghani-Arani, F., M.E. Willis, S.S. Haines, M. Batzle and J. Behura, 2013, An effective noise suppression technique for surface microseismic data, Geophysics 78, no 6, KS85-95.

Du, Y., M.E. Willis, and R.R. Stewart, 2015, Vertical seismic profile migration velocity analysis via residual moveout in receiver domain common image gathers, Geophysics 80 (5), 1-16, doi:10.1190/GEO2014-0240.1

Willis, M.E., Erdemir, C., Ellmathauler, A., Barrios-Lopez, O., Barfoot, D., 2016, Comparing DAS and geophone zero offset VSP data sets side by side, CSEG Recorder, June, 22-26.

Willis, M.E., Barfoot, D., Ellmathauler, A., Wu, X., Barrios, O., Erdemir, C., Shaw, S., and Quinn, D., 2016, Quantitative quality of distributed acoustic sensing vertical seismic profile data, The Leading Edge, July, 605-609. Doi:10.1190/tle35070605.1.

Willis, M.E., Ajo-Franklin, J., and Roy, Baishali, 2017, Introduction to this special section: geophysical applications of fiber-optic distributed sensing, The Leading Edge: 36 (12) pp. 973-974.

Wu, X., Willis, M.E., Palacios, W., Ellmauthaler, A., Barrios, O., Shaw, S., and Quinn, D., 2017, Compressional- and shear-wave studies of distributed acoustic sensing acquired vertical seismic profile data, The Leading Edge: 36 (12) pp. 987-993.

Patents

Willis, M.E., 1987, Method for identifying arrival times of waveforms on acoustic borehole well logs: US Patent 4,683,556.

Willis, M.E., 1987, Acoustic logging method for identifying subsurface formation boundaries: US Patent 4,683,557.

Willis, M.E., 1987, Method for identifying arrival times of waveforms on acoustic borehole well logs: Canadian Patent 1,236,207.

Willis, M.E., Ranganayaki, R., Shirley, T. and Lee, S., 1989, Method for seismic trace interpolation using a forward and backward application of wave equation datuming: US Patent 4,887,244.

Willis, M.E., Roy, B., Davidson, M., and Tura, A., 2014, Time-lapse 4D scattering for imaging hydraulically induced fractures, US patent publication US 2014/0343859 A1.

Willis, M.E., 2015, Shear wave source for VSP and surface seismic exploration, US patent publication number US 2015/0012220 A1.

Willis, M.E., Ay, E., Chen, T., and Warpinski, N., 2015, Seismic energy sources and methods of use, US Patent 8,982,671 B2.

Willis, M.E. and Du, Y., 2015, Migration velocity analysis method for VSP data, US patent 9,804,281.

Willis, M.E., and Du, Y., 2015, Geophysical prospecting by processing vertical seismic profiles using downward continuation, US Patent 9,797,243.

Willis, M.E., Padhi, A., and Barfoot, D., 2015, Distributed acoustic sensing gauge length effect mitigation, US Patent 9,702,244.

Cheng, A., Willis, M.E., Gilstrap, T. and Epstein, E., 2016, Determining cement impedance from a formation boundary, US Patent 9,606,254.

Ellmauthaler, A., Willis, M.E., Leung, V., and Wu, X., 2016, Trace downsampling of distributed acoustic sensor data, US patent publication number WO216053582 A1.

Ellmauthaler, A., Willis, M.E.,  Barfoot, D., and Walker, K., 2016, Noise removal for distributed acoustic sensing data, publication number WO 2016/039928 A1.

Willis, M.E., Barrios, O., Leung, V., and Ellmauthaler, A., 2016, Noise removal for distributed acoustic sensing data, publication number WO 2016/011431 A1.

 

 Presentations / Extended Abstracts

Willis, M.E. and Toksöz, M.N., 1979, Velocity and attenuation from digital full wave sonic logs: 49th Annual International SEG Meeting, New Orleans.

Cheng, C. H., Toksöz, M.N., and Willis, M.E., 1981, Velocity and attenuation from full waveform acoustic logs: Expanded Abstracts SPWLA 22nd Ann. Logging Symposium, Mexico City.

Willis, M.E., Toksöz, M.N. and Cheng, 1982, Approximate effects of off-center acoustic sondes and elliptic boreholes upon full waveform logs: SEG Expanded Abstracts 1, 321-322, doi:10.1190/1.1826956.

Willis, M.E., Cheng, C.H., and Toksöz, M.N., 1983, Formalized inversion of full waveform acoustic log traveltimes for velocity: SEG Expanded Abstracts 2, 13-15, doi:10.1190/1.1893782.

Hellman, K.J., Willis, M.E., and Young, T.K, 1986, Evaluation of a reverse-time prestack migration algorithm, SEG Expanded Abstracts 5, 330-332, doi:10.1190/1.1893099.

Willis, M.E. and Stewart, W.E., 1991, Two migration results – a model study: Advances in 2D Prestack Imaging Research Workshop, 61st Annual International Meeting of SEG, Houston, TX.

MacBeth, C., Wilson, M. and Willis, M.E., 1997, A field example of fracture analysis using shear wave conversions from near-offset VSP, 59th EAGE Conf. and Tech. Expo., Expanded Abstracts, Geneva, Switzerland.

Clark, D., Scott, I, and Willis, M.E., 1998, Using borehole data to optimize demultiple parameter selection – a North Sea example: SEG Expanded Abstracts 17, 1343-1346, doi:10.1190/1.1820151.

Willis, M.E., Pearce, F., Burns, D., Byun, J. and Minsley, B, 2004, Reservoir fracture orientation and density from reflected and scattered seismic energy: 66th EAGE Conf. and Tech. Expo., Expanded Abstracts, Paris.

Willis, M. E., Burns, D., Rao, R., Minsley, B., and Zhang, Y., 2004, Characterizing seismic scattering from discrete fracture systems: SEG Summer Research Workshop on Fractured Reservoirs, Vancouver, Canada.

Willis, M. E., Rao, R., Burns, D., Byun, J., and Vetri, L., 2004, Spatial orientation and distribution of reservoir fractures from scattered seismic energy: SEG Expanded Abstracts 23, 1535-1538, Expanded Abstracts 23, 1535, doi:10.1190/1.1851133.

Minsley, B.J., Willis, M.E., Krasovec, M., Burns, D.R. and Toksöz, M.N., 2004, Investigation of a fractured reservoir using P-wave AVOA analysis: a case study of the Emilio Field with support from synthetic examples: SEG Expanded Abstracts 23, 248-251, doi:10.1190/1.1851250.

Cheng, C.H. and Willis, M. E., 2005, Modern acoustic logs: what do they measure and how do they measure them, 73rd Annual International Meeting, SEG, Acoustic Logging Workshop.

Willis, M. E., and Rao, R., 2005, Attenuation losses induced by discrete vertically aligned fractures, 67th EAGE Conf. and Tech. Expo., Expanded Abstracts, Madrid.

Rao, R., Willis, M.E., Burns, D. R., Toksöz, M.N., and Vetri, L., 2005, Fracture spacing and orientation estimation from spectral analyses of azimuth stacks, SEG Expanded Abstracts 24, 1409-1412, doi:10.1190/1.2147952.

Burns, D.R., Willis, M. E., Minsley, B.J., and Toksöz, M.N., 2005, Characterizing subsurface fractures from reflected and scattered seismic energy, 7th Annual SEG Japan International Symposium on Imaging Technology, Expanded Abstracts.

Zhang, Y., Chi, S., Willis, M.E., Burns, D.R., and Toksöz, M.N., 2005, Comparison of discrete fracture and effective media representation of fractures on azimuthal AVO, SEG Expanded Abstracts 24, 305-307, doi:10.1190/1.2144328.

Cheng, C.H. and Willis, M.E., 2006, Depth of investigation of modern acoustic logs, 76th Annual International Meeting of SEG, workshop presentation.

Willis, M.E., Lu, R., Campman, X., Ajo-Franklin, J. and Toksöz, M.N., 2006,  Advances in imaging sediments beneath salt domes – VSP seismic interferometry and reverse-time depth migration, SEG Summer Research Workshop on Subsalt Imaging, Snowbird.

Lu, R., Willis, M.E., Campman, X., Ajo-Franklin, J. and Toksöz, M.N., 2006,  Imaging dipping sediments at a salt dome flank – VSP seismic interferometry and reverse-time migration, SEG Expanded Abstracts 25, 2191-2195, doi:10.1190/1.2369970.

Zhang, Y., Campman, X., Grandi, S., Chi, S., Willis, M.E., Toksöz, M.N. and Burns, D.R., 2006, F-K domain characteristics of the seismic response of a set of parallel discrete fractures,  SEG Expanded Abstracts 25, 1727-1731, doi:10.1190/1.2369857.

Grandi, S., Yuh, S., Willis, M.E., and Toksöz, M.N., 2006, Fracture characterization from scattered seismic energy: a case study, SEG Expanded Abstracts 25, 1732-1736, doi:10.1190/1.2369858.

Lu, R., Willis, M.E., Campman, X., Ajo-Franklin, J. and Toksöz, M.N., 2007, Redatumming through a salt canopy – another salt imaging strategy, SEG Expanded Abstracts 26, 3054-3058, doi:10.1190/1.2793105.

Grandi, S., Willis, M.E., Burns, D.R., and Toksöz, M.N., 2007, Analysis of scattered signal to estimate reservoir fracture parameters, EAGE/SEG Research Workshop, Expanded Abstracts, Perugia, Italy.

Willis, M.E., Burns, D.R., Lu, R., House, N.J., and Toksöz, M.N., 2007, Fracture quality from integrating time-lapse VSP and microseismic data, EAGE/SEG Research Workshop, Expanded Abstracts, Perugia, Italy.

Willis, M.E., Burns, D.R., Willis, K.M., House, N.J., and Shemeta, J., 2008, Hydraulic fracture quality from time lapse VSP and microseismic data SEG Expanded Abstracts 27, 1565-1569, doi:10.1190/1.3059211

Lu, R., Toksöz, M.N., and Willis, M.E., 2008, Locating microseismic events with time reversed acoustics: a synthetic study, SEG Expanded Abstracts 27, 1342-1346. doi:10.1190/1.3059378

Lu, R., Willis, M.E., Campman, X., and Toksöz, M.N., 2008, Salt flank imaging with elastodynamic interferometric redatumming, SEG Expanded Abstracts 27, 1068-1072. doi:10.1190/1.3059374

Willis, M.E., Willis, K.M., Burns, D.R., Shemeta, J., and House, N.J., 2009, Determining hydraulic fracture effectiveness by using time lapse VSP and microseismic data, Permian Basin Geophysical Society, March 11, Midland TX.

Willis, M.E., Willis, K.M., Burns, D.R., Shemeta, J., and House, N.J., 2009, Fracture quality images from 4D VSP and microseismic data at Jonah Field, WY, SEG Expanded Abstracts 28, 4110-4114, doi:10.1190/1.3255729

Lu, R., Willis, M.E., Mateeva, A., Lopez, J. and Toksöz, M.N., 2009, Imaging a salt dome flank by directional redatumming of a field 3-D VSP survey, SEG Expanded Abstracts 28, 4085-4089, doi:10.1190/1.3255724

Poliannikov, O. and Willis, M.E., 2010, Interferometric correlogram-space analysis, SEG Expanded Abstracts 29, 4052, doi:10.1190/1.3513705.

Blum, T.E., Sneider, R., van Wijk, K., and Willis, M.E., 2011, Elastic scattering by planar fractures, SEG Expanded Abstracts.

Forghani-Arani, F., Willis, M.E., Haines, S., Batzle, M., Davidson, M., 2011, Analysis of passive surface-wave noise in surface microseismic data and its implications, SEG Expanded Abstracts.

Sil, S., Davidson, M., Zhou, C., Olson, R., Swan, H., Howell, J., Chiu, S. ,and Willis, M.E., 2011, Effect of near-surface anisotropy on a deep anisotropic target layer, SEG Expanded Abstracts.

R.R. Stewart, Dyaur, N., Omoboya, B., de Figueiredo, J.J.S., Willis, M.E. and Sil, S., 2011, Physical modeling of anisotropic domains: ultrasonic imaging of laser-etched fractures in glass, SEG Expanded Abstracts.

Willis, M.E., Fang, X., Pei, D., Shang, X., and Cheng, A., 2012, Advancing the use of rapid time lapse shear wave VSPs for capturing diffractions from hydraulic fractures to estimate fracture dimensions, 74th EAGE Conf. and Exhib.

Willis, M.E., P. Peterman, D. Pei, R. Zhou, and B. Cornish, 2012, Imaging from nearly horizontal wells under complex overburden, AAPG 2012 Internat. Conf. & Exhib. in Singapore.

Forghani-Arani, F., Willis, M., Haines, S., Batzle, M., Behura, J., and Davidson, M., 2012, Noise suppression in surface microseismic data by τ-p transform, SEG Expanded Abstracts.

Willis, M.E., Pei, D., Cheng, A., Fang, X. and Shang, X., 2012, Watching fractures open and close using VSP P and S wave diffractions, SEG Workshop on diffraction imaging in Las Vegas.

Willis, M.E., 2013, Some practical aspects of using VSP interferometry in horizontal wells for imaging above and below the wellbore, EAGE 3D VSP Workshop, Malta, March.

Forghani-Arani, F., Willis, M., Haines, S.S., Behura, J. and Batzle M., 2013, Signal enhancement in microseismic data: application to a field dataset, SEG International Exposition and Eighty-Third Annual Meeting.

Du, Y., Willis, M.E. and Cheng, C.H., 2013, Analysis of residual moveout after migration of walk-away VSP data, SEG International Exposition and Eighty-Third Annual Meeting.

Willis, M.E., 2013, Scattered energy from hydraulic fractures: field data versus numerical results for P and S waves, SEG Houston Post-convention Workshop – Are we able to detect and characterize fractures?

Willis, M.E., Barfoot, D., Peterman, P and Gibbs, J., 2013, DAS VSP acquired using a conventional fiber optic wire line cable, SEG Houston Post-convention Workshop – DAS Distributed Acoustic Sensing.

Willis, M.E., 2014, Estimating frac fluid pathways from rapid time-lapse VSP and microseismic events, SEG Technical Program Expanded Abstracts 4577-4581.

Du, Y., Willis, M.E., Stewart, R.R., 2014, Simulating surface seismic records for VSP data: a 3D test, SEG Technical Program Expanded Abstracts 5039-5043.

Willis, M.E., Padhi, A., Barfoot, D., 2014, The value of many DAS VSP channels and the effect of gauge length on the signal quality, SEG Distributed Acoustic Sensing Workshop.

Willis, M.E., Foy, R., Padhi, A., and Barrios, O.A., 2015, A quick, flexible, layer-based VSP modeling algorithm, Houston Geophysical Society Technical Lunch.

Willis, M.E., Barfoot, D., Ellmauthaler, A., Wu, X., Quinn, D, and Erdemir, C., 2015, Lab and field based calibration of DAS VSP data, SEG Workshop on Distributed Acoustic Sensing, New Orleans.

Willis, M.E., Ellmauthaler, A., Wu, X., Barfoot, D., Erdemir, C., Barrios-Lopez, O., Quinn, D. and Shaw, S., 2016, Calibration of distributed acoustic (DAS) VSP data, EAGE Conf. and Tech. Expo., Expanded Abstracts, Vienna.

Ellmauthaler, A., Barfoot, D.,  and Willis, M.E., 2016, Depth calibration of distributed acoustic sensing VSP data, SPE Distributed Fiber-Optic Sensing for Well Reservoir and Facilities Management Workshop, Colorado Springs.

Wu, X., Willis, M.E., Ellmauthaler, A., Barfoot, D., and Erdemir, C., 2016, Quality of VSP data acquired by distributed acoustic sensing, SPE Distributed Fiber-Optic Sensing for Well Reservoir and Facilities Management Workshop, Colorado Springs.

Padhi, A., Willis, M.E., and Zhao, X., 2016, An Eikonal-based offset-to-angle transform for VSP walkaway data, SEG Technical Program Expanded Abstracts, Dallas.

Ellmauthaler, A., Barfoot, D., Willis, M.E., Wu, X., Erdemir, C., Barrios, O., Quinn, D., and Shaw, S., 2016, Depth calibration for DAS VSP – lessons learned from two field trials, SEG Technical Program Expanded Abstracts, Dallas.

Ellmauthaler, A., Willis, M.E., Wu, X., and Barfoot, D., 2016, Factors affecting the quality of DAS VSP data, SEG Fiber-Optic Sensing for Exploration and Monitoring: Developments, Applications, and Challenges, Dallas.

Willis, M.E., Wu, X., Palacios, W., Ellmauthaler, A., and Barfoot, D., 2016, Combined use of P and S DAS VSP data, SEG Workshop Fiber-Optic Sensing for Exploration and Monitoring: Developments, Applications, and Challenges, Dallas.

Willis, M.E., Zhao, X., Wu, X., Ellmauthaler, A., Palacios, W., LeBlanc, M., 2017, Effect of production flow and pump jack noise on a distributed acoustic sensing VSP data set, SEG Technical Program Expanded Abstracts: pp. 931-935.

Zhou, R., and Willis, M.E., 2017, Characterization of a fractured reservoir using distributed acoustic sensing VSP: a model-based study, SEG Technical Program Abstracts: pp. 5979-5983.

Willis, M.E., Ajo-Franklin, J., and Roy, Baishali, 2017, Introduction to this special section: geophysical applications of fiber-optic distributed sensing, The Leading Edge: 36 (12) pp. 973-974.

Wu, X., Willis, M.E., Palacios, W., Ellmauthaler, A., Barrios, O., Shaw, S., and Quinn, D., 2017, Compressional- and shear-wave studies of distributed acoustic sensing acquired vertical seismic profile data, The Leading Edge: 36 (12) pp. 987-993.

Zhou, R., Willis, M.E., Cheng, D., and Green, K., 2017, Characterization of a fractured reservoir using DAS VSP – a model-based reflection amplitude study, Fourth EAGE Borehole Geophysics Workshop.

Ellmauthaler, A., Willis, M.E., Wu, X., and LeBlanc, M., 2017, Noise sources in fiber-optic distributed acoustic sensing VSP data, 79th EAGE Conference and Exhibition.

Padhi, A. and Willis, M.E., 2017, Travel time computation using a high-order fast-sweeping-based eikonal solver for 3D tilted TI media, 79th EAGE Conference and Exhibition.

Willis, M.E., Wu, X., Padhi, A., Ellmauthaler, A., and LeBlanc, M., 2018, Effect of the angular response of a fiber-optic cable on DAS VSP recordings in lateral wells, 80th EAGE Conference and Exhibition.

LeBlanc, M., Ellmauthaler, A., Willis, M.E., and Wu, X., 2018, Use of long gauge length distributed acoustic sensing for improved spatial resolution of first break detection, 80th EAGE Conference and Exhibition.