This document provides a summary of John C. Rasmus's employment history and qualifications. It outlines his educational background including degrees in mechanical engineering and petroleum engineering. It then details his 40+ year career with Schlumberger in various engineering and advisory roles developing new interpretation models and commercializing technologies. It lists 18 technical papers he has authored for SPE and 11 for SPWLA covering topics like LWD interpretation, reservoir characterization, and anisotropy analysis.

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EMPLOYEE HISTORY AND DEVELOPMENT SUMMARY
1. Name: John C. Rasmus Job Title: Advisor
Registered Professional Engineer - Petroleum Engineering - #82064
Registered Professional Geoscientist - Geophysics - #5390
2. Education.
M.S. Petroleum Engineering University of Houston 2000-2002
8 hours Petroleum Engineering Colorado School of Mines 1982-1984
B.S. Mechanical Engineering Iowa State University 1971-1975
3. Experience.
SCHLUMBERGER OILFIELD SERVICES-
Field Engineer, Utah, Wyoming, North Dakota 1975-1979
Recruiting Engineer, USA West Unit 1979-1981
Applications Development Engineer, Rocky Mountains, Kansas 1981-1984
Product Development Manager, Canada 1984-1986
Development Engineer, Reservoir Interpretation. 1986-1987
SCHLUMBERGER - ANADRILL
Development Engineer, Interpretation Engineering 1987 - 1989
Senior Development Engineer, Interpretation Engineering 1989 - 1991
Engineering Specialist, Answer Products, Drilling Interpretation 1991 - 1997
SCHLUMBERGER - DRILLING AND MEASUREMENTS
Principal Engineer, LWD Engineering, Resistivity At Bit 1997 - 2001
Principal Engineer, LWD Interpretation InTouch Engineer 2001 - 2005
Advisor, LWD Interpretation InTouch Engineer 2005 - 2008
Advisor, Applications Engineer for 3DP Project 2008 - 2009
Advisor, Applications Engineer for WDP Project 2009 - 2011
Advisor, Core-Log Integration for TerraTek/Engineer WDP Project 2011 - 2012
Advisor, Petrophysicist for 3D Petrophysics project 2012 - Present

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4. Research/Development key contributions and significant
accomplishments.
 Developed interpretation models for fractured carbonates utilizing resistivity,
sonic, and neutron-density measurements (1979).
 Developed Interpretation model for Oomoldic carbonates utilizing high
frequency dielectric and low frequency resistivity measurements (1984).
 Developed DPT (25Mhz dielectric) interpretation model (1986).
 Developed math model for saturation and cementation exponents as a
function of pore geometries (1986).
 Developed new shale pore pressure interpretation model for undercompacted
shales utilizing MWD and LWD measurements. Commercialized as PERT
(Pressure Evaluation Real Time) program on Advisor Work Station (1990).
 Advised and assisted in the development of a technique to display and interpret logging-while
drilling data in horizontal wells This display and interpretation insures the well bore is placed in
the optimum location within the reservoir. (1992)
 Developed method for optimizing the performance of downhole positive
displacement motors utilizing the GST measurement of motor RPM.
Commercialized as PDM (PowerDrilling Monitor) program on Ideal V3 surface
system (1994).
 Developed patented method for using high sample frequency surface measurements to
enhance low sample frequency downhole measurements. (1994).
 Developed method to compute the directional tendency of the bottomhole drilling
assembly while drilling for both rotating and sliding modes of operation. (1996)
 Developed interpretation applications for a new laterolog type resistivity measurement (GVR)
as a member of the engineering team assigned to this tool project. This is the highest resolution
laterolog type tool in the borehole geophysical market and requires interpretation of multi-depth
of investigation three dimensional measurements.
 Worldwide Knowledge Champion for LWD Interpretation field operations support. Nuclear,
resistivity, sonic, nuclear magnetic resonance, and pressure measurement interpretation support
is provided. Teach and present LWD interpretation and LWD tool measurement theory at
various in-house and client schools.

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5. Technical Papers Written.
SPE Publications
1. Rasmus, J.C. :”Fluid Evaluation of Fractured Hydrocarbon Intervals in the Twin Creek
Formation of the Yellow Creek Field”. 1981 SPE/DOE Low Permeability Symposium, Denver,
Colo. May 27-29, 1981.
2. Rasmus, J.C., “Determining the Type of Fluid Contained in the Fractures of the Twin Creek
Limestone By Using the Dual Laterolog Tool”. November 1982 JPT.
3. Allen, D. Rasmus, J. C., Sheppard, M., Ahmed, U.,”Real-Time Formation Analysis Can Help
Drilling Decisions”, 1991 IADC Drilling Symposium, Amsterdam.
4. Rasmus, J. C. :”Real Time Pore Pressure Evaluation Utilizing MWD/LWD Measurements and
Drilling Derived Formation Strength”, 1990 SPE Annual Conference, New Orleans, La. Later
published in the December 1991 SPE publication “Drilling Engineer”.
5. Wand, P. A., Rasmus, J. C. :”An Integrated Approach to Minimizing risk While Drilling”, 1994
SPE International conference on Health, Safety, & Environment, Jakarta, Indonesia.
6. Rasmus, J. C., Liu, A., “Techniques for Accurate Geological Correlations in Highly Deviated
and Horizontal Wells When Drilled Through Dipping Beds”, 1996 SPE International
Conference on Horizontal Well Technology, Calgary, Alberta Canada.
7. Farruggio, G., Rasmus, J. C., Low, S., Ingold, C., Jackson, K., Curtis, C., “Innovative Use of
BHAs and LWD Measurements to Optimize Placement of Horizontal Laterals”, 1999
SPE/IADC Drilling Conference, Amsterdam, Holland.
8. Rasmus, J. C., Bornemann, T., Farruggio, G., Low, S., “Optimizing Horizontal Laterals in a
Heavy oil Reservoir Using LWD Azimuthal Measurements”, 1999 SPE Annual Technical
Conference, Houston, Tx.
9. Rohler, H., Bornemann, T., Darquin, A., Rasmus, J. C., “The Use of Real-Time and Time-
Lapse Logging-While-Drilling Images for Geosteering and Formation Evaluation in the
Breitbrunn Field, Bavaria, Germany”, 2001 SPE Annual Technical Conference, New Orleans,
La.
10. Crary, S., Jacobsen, S., Rasmus, J. C., “Effect of Resistive Invasion on Resistivity Logs”, 2001
SPE Annual Technical Conference, New Orleans, La.
11. John C. Rasmus, John P. Horkowitz, Thierry Chabernaud, Peter Graham, Malcolm Summers,
Danny Wise, "A New Formation Evaluation Technique for the Lower Tertiary in South Texas –

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Predicting Production in Low Permeability, Fine-Grained Sandstones" 2004 SPE International
Petroleum Conference, Puebla, Mexico.
12. John C. Rasmus, Cengiz Esmersoy, Jean Seydoux, Andy Hawthorn, Schlumberger, “LWD for
Imaging, Wellbore Placement and Formation Evaluation”, 2005 Offshore Technology
Conference Houston, TX, U.S.A., 2–5 May 2005. OTC-17646-PP
13. Alberto Mendoza, SPE, The University of Texas at Austin, Darwin V. Ellis, Schlumberger
Doll-Research, and John C. Rasmus, SPE, Schlumberger Sugarland Technology Center, “Why
the LWD and Wireline Gamma-ray Measurements May Read Different Values in the Same
Well”, First International Oil Conference and Exhibition in Mexico Cancun, Mexico, 31
August–2 September 2006. SPE 101718-PP
14. Improving LWD Image and Formation Evaluation by Utilizing Dynamically Corrected
Drilling-Derived LWD Depth and Continuous Inclination and Azimuth Measurements”, G.A.
Bordakov, A.V. Kostin, J. Rasmus, D. Heliot, SPE, Schlumberger; H. Laastad, SPE, Statoil;
and E.J. Stockhausen, SPE, Chevron, 2007 SPE Annual Technical Conference and Exhibition,
Anaheim, California, U.S.A., 11–14 November 2007. SPE 109972
15. Estimation of Permeability and Permeability Anisotropy in Horizontal Wells Through
Numerical Simulation of Mud Filtrate Invasion, Nelson Pereira, Petrobras, Raphael Altman,
John Rasmus, Jansen Oliveira, Schlumberger, 2008 Rio Oil & Gas Expo and Conference,
September, 15-18, 2008, IBP2312_08
16. John Rasmus, SPE, Alain Dorel, Tony Azizi, Andre David, Ember Duran, Hector Lopez, Gare
Aguinaga, Juan Carlos Beltran, Antonio Ospino, Schlumberger, Eduardo Ochoa, NOV
IntelliServ, "Utilizing Wired Drill Pipe Technology During Managed Pressure Drilling
Operations to Maintain Direction Control, Constant Bottom-hole Pressures and Well-bore
Integrity in a Deep, Ultra-depleted Reservoir", SPE/IADC Drilling Conference and Exhibition
held in Amsterdam, The Netherlands, 5-7 March 2013
17. Sharon Finlay, Maersk Oil Qatar, Noureddine Bounoua, Qatar Petroleum, Farzad Irani,
Schlumberger John Rasmus, Schlumberger, Chuck Fulton, Schlumberger, Stephanie Chow Yuk
Ha, Schlumberger, Laura Pontarelli, Schlumberger, "Improvements in Reservoir Fracture
Network Characterization Using High Resolution Logging While Drilling Resistivity Images In
Extended Reach Wells Under High Stick Slip Conditions" the International Petroleum
Technology Conference held in Doha, Qatar, 20-22 January 2014
18. Edward Stockhausen, Chevron; John Rasmus, Schlumberger and Sachin Bammi,
Schlumberger, “Computation of Apparent Formation Dip from Single Azimuth Sensor Data
Having Different Depths of Investigation, Society of Petroleum Engineers, SPE Annual
Technical Conference and Exhibition held in Houston, Texas, USA, 28–30 September 2015.

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SPWLA Publications
1. Rasmus, J. C. :”A Variable Cementation Exponent, M, For Fractured Carbonates”,
November-December 1983 The Log Analyst.
2. Rasmus, J. C., Kenyon, W. E. :”An Improved Petrophysical Evaluation of Oomoldic
Lansing-Kansas City Formations Utilizing Conductivity and Dielectric Log
Measurements”, 1985 SPWLA Symposium Dallas, Tx.
3. Rasmus, J. C. :”A Summary of the Effects of Various Pore Geometries and Their
Wettabilities on Measured and in-situ Values of Cementation and Saturation Exponents”,
1986 SPWLA Symposium, Houston, Tx.
4. Rasmus, J. C., Gray ,T. :” A Laboratory Study of Oomoldic Rock Substantiating a
Conductivity-Dielectric Interpretation Technique and the Non-Interdependence of the
Archie Petrophysical Parameters”, 1988 SPWLA Symposium, San Antonio, Tx.
5. Li, Q., Rasmus, J. C., Cannon, D.,” A Novel Inversion Method for Interpretation of a
Focused Multisensor LWD Laterolog Resistivity Tool”, 1999 SPWLA Symposium, Oslo,
Norway.
6. Bratton, T., Bornemann, T., Li, Q., Plumb, D., Rasmus, J. C., krabbe, H.,” Logging-While-
Drilling Images for Geomechanical, Geological, and Petrophysical Interpretations”, 1999
SPWLA Symposium, Oslo, Norway.
7. Li, Q., Bornemann, T., Rasmus, J. C.,Wang, H., Hodenfield, K., Lovell, J.,” Real-Time
Logging-While-Drilling Image: Techniques and Applications”, 2001 SPWLA Symposium.
8. Rasmus, J. C., Tabanou, J., Li, Q., ChengBing L., Pagan, R., Pucavira, N., Higgins, T., ”
Resistivity Dispersion – Fact or Fiction?”, 2003 SPWLA Symposium, Houston, Tx.
9. Najmud Dowla, John C. Rasmus, Shashikant Srivastava, Schlumberger; Darwin Ellis,
Schlumberger-Doll Research; and Chuck Fulton, Schlumberger, “CALIPER AND
BOREHOLE GEOMETRY DETERMINATIONS FROM LOGGING WHILE DRILLING
MEASUREMENTS AND IMAGES”, SPWLA 47th
Annual Logging Symposium,
Veracruz, Mexico, June 4-7, 2006.
10. R. J. Radtke, Mike Evans, and John C. Rasmus, Schlumberger, Darwin V. Ellis, Joseph M.
Chiaramonte, and Charles R. Case, Schlumberger-Doll Research, and Ed Stockhausen,
Chevron, “LWD DENSITY RESPONSE TO BED LAMINATIONS IN HORIZONTAL
AND VERTICAL WELLS”, SPWLA 47th
Annual Logging Symposium, Veracruz, Mexico,
June 4-7, 2006.

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11. Barbara I. Anderson, Thomas D. Barber, Martin G. Lüling, John Rasmus, Pabitra N. Sen,
Jacques R. Tabanou, Schlumberger, Mark Haugland, Shell, « Observations of Large
Dielectric Effects on LWD Propagation-Resistivity Logs”, Society of Petrophysicists and
Well Log Analysts, SPWLA 48th
Annual Logging Symposium, Austin, Texas, United
States, June 3-6, 2007.
12. Jacques R. Tabanou, Jean Michel Denichou, Jack Horkowitz, Dzevat Omeragic, John
Rasmus, Jian Yang, Schlumberger , “Going beyond “Geometrical drilling”: A Review of
the contribution of LWD measurements to the improvement of Well placement”, 1st
SPWLA India Regional Conference on Formation Evaluation in Horizontal Wells, March,
March 19, 20 2007 .
13. E.A. Uzoh, A. Mendoza, C. Torres-Verdín, The University of Texas at Austin, W.E. Preeg,
Consultant, E. Stockhausen, Chevron Energy Technology Company, “QUANTITATIVE
STUDIES OF RELATIVE DIP ANGLE AND BED - THICKNESS EFFECTS ON LWD
DENSITY IMAGES ACQUIRED IN HIGH-ANGLE AND HORIZONTAL WELLS”,
SPWLA 48th
Annual Logging Symposium, Austin, Texas, June 3-6, 2007.
14. Raphael Altman, Barbara Anderson, John Rasmus, Martin G. Lüling (Schlumberger),
“DIELECTRIC EFFECTS AND RESISTIVITY DISPERSION ON INDUCTION AND
PROPAGATION-RESISTIVITY LOGS IN COMPLEX VOLCANIC LITHOLOGIES: A
CASE STUDY”, Society of Petrophysicists and Well Log Analysts, SPWLA 49th
Annual
Logging Symposium, Edinburgh, Scotland, May 25-28, 2008.
15. John C. Rasmus, Raphael Altman, Tom Barber, Mohan Javalagi, Schlumberger, "Workflow
for Determining True Formation Resistivity inHAHZ Wells," SPWLA 50th Annual
Logging Symposium held in The Woodlands, TX, June 21-24, 2009
16. Alberto Mendoza and Carlos Torres-Verdin, The University of Texas at Austin, Bill Preeg,
Consultant; John Rasmus and R. J. Radtke, Schlumberger; Ed Stockhausen, Chevron,
"INVERSION OF SECTOR-BASED LWD DENSITY MEASUREMENTS ACQUIRED
IN LAMINATED SEQUENCES PENETRATED BY HIGH-ANGLE AND
HORIZONTAL WELLS", SPWLA 50th Annual Logging Symposium held in The
Woodlands, Texas, United States, June 21-24, 2009
17. Ann Cook, National Research Council/National Energy Technology Laboratory Methane
Hydrate Postdoctoral Fellow at Lamont-Doherty Earth Observatory USA, John Rasmus,
Qiming Li and Keli Sun Schlumberger USA, Barbara Anderson Consultant USA,
"ANALYZING ELECTRICAL ANISOTROPY IN GAS HYDRATE RESERVOIRS
USING LOGGING-WHILE-DRILLING DIRECTIONAL RESISTIVITY DATA FROM
THE GULF OF MEXICO GAS HYDRATE JOINT INDUSTRY PROJECT", Proceedings
of the 7th International Conference on Gas Hydrates (ICGH 2011), Edinburgh, Scotland,
United Kingdom, July 17-21, 2011.

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18. Ann E. Cook, Barbara I. Anderson, John Rasmus, Keli Sun, Qiming Li, Timothy S. Collett,
and David S. Goldberg, " Electrical anisotropy of gas hydrate-bearing sand reservoirs in the
Gulf of Mexico", JMPG, 2011
19. Keli Sun, Dzevat Omeragic, Chanh Cao Minh, John Rasmus, Jian Yang, Andrei
Davydychev, Tarek Habashy, Roger Griffiths, Graham Reaper, Qiming Li, Schlumberger,
"Evaluation of Resistivity Anisotropy and Formation Dip from Directional Electromagnetic
Tools While Drilling", SPWLA 51st Annual Logging Symposium, Perth, Australia, June
19-23, 2010
20. M.K. Dennis, J. Rasmus, R.J. Radtke, V. Jain - Schlumberger,"THE EFFECTS OF LWD
DENSITY STABILIZER METAL LOSS ON THE COMPENSATED DENSITY
MEASUREMENTS AND A PROPOSED SOLUTION", SPWLA 52nd Annual Logging
Symposium, Colorado Springs, Colorado, USA, May 14-17, 2011
21. Roger Griffiths, Chris Morriss, Koji Ito, John Rasmus, David Maggs, "Formation
Evaluation in High Angle and Horizontal Wells - A New and Practical Workflow SPWLA
53rd Annual Logging Symposium held in Cartagena, Colombia, June 16-20, 2012
22. Jing Li, Tsili Wang, Mark K. Dennis, John Rasmus, and Dave Kennedy, "A DISCOVERY
IN THE LWD RESISTIVITY TOOL RESPONSE IN AHIGH-ANGLE WELL - A CASE
STUDY OF SPIRALED BOREHOLE RESPONSE" SPWLA 53rd Annual Logging
Symposium held in Cartagena, Colombia, June 16- 20, 2012
23. Sushil Shetty, Dzevat Omeragic, Tarek Habashy, Jeffrey Miles, John Rasmus, Roger
Griffiths, Chris Morriss, Schlumberger, and Ed Stockhausen, Chevron, "INVERSION-
BASED WORKFLOWS FOR INTERPRETATION OF NUCLEAR DENSITY IMAGES
IN HIGH-ANGLE AND HORIZONTAL WELLS", SPWLA 53rd Annual Logging
Symposium held in Cartagena, Columbia, Jun 16-20, 2012
24. Olabode Ijasan, Carlos Torres-Verdin, William E. Preeg, John Rasmus, Edward
Stockhausen, "Field examples of the joint petrophysical inversion of resistivity and nuclear
measurements acquired in high-angle and horizontal wells," GEOPHYSICS, VOL. 79, NO.
3 (MAY-JUNE 2014); P. D145-D159
25. Dzevat Omeragic, Lin Sun, Valery Polyakov, Yong-Hua Chen, Xiande Cao, Tarek
Habashy,Torbjoern Vik, John Rasmus, and Jean-Michel Denichou, Schlumberger,
"CHARACTERIZING TEARDROP INVASION IN HORIZONTAL WELLS IN THE
PRESENCE OF BOUNDARIES USING LWD DIRECTIONAL RESISTIVITY
MEASUREMENTS", SPWLA 54th Annual Logging Symposium held in New Orleans, LA,
Jun 22-26, 2013

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26. John Rasmus, Olabode Ijasan, Chris Morriss, Roger Griffiths, Darwin Ellis, Joseph M.
Chiaramonte, Charles R. Case, Carlos Torres-Verdin, "Is Porosity Anisotropy Real and Will
it Affect My Petrophysical Evaluations?" SPWLA 54th Annual Logging Symposium held
in New Orleans, Louisiana, June 22-26, 2013
27. John Rasmus, Tom Barber - Schlumberger, Becky Poon - Shell Nigeria Exploration &
Production Co., "A SYNOPSIS OF OIL-BASED MUD EFFECTS ON WIRELINE AND
LWD RESISTIVITY LOGS", SPWLA 54th Annual Logging Symposium held in New
Orleans, Louisiana, June 22-26, 2013
28. Sushil Shetty, John Rasmus, C. Morriss, K. Ito, S. Asif, V. Picco, R. Griffiths, D. Maggs,
M. Qleibo, Schlumberger; and E. J. Stockhausen, Chevron, "Fast Automatic Method For
Structural Interpretation of LWD Images in Horizontal Wells", Borehole Geology
Workshop - Optimising the Use of Your Borehole Image Data 13-15 October 2014, Dubai,
UAE
29. Hui Xie, Dzevat Omeragic, Sushil Shetty, Tarek Habashy, Jeffrey Miles, John Rasmus,
Roger Griffiths, Chris Morriss, Schlumberger, and Edward J. Stockhausen, Chevron
Services Company, "IMPROVED CONSISTENCY OF INVERSION-BASED
INTERPRETATION OF LWD DENSITY IMAGES IN COMPLEX HORIZONTAL
WELL SCENARIOS", SPWLA 55th Annual Logging Symposium held in Abu Dhabi,
United Arab Emirates, May 18-22, 2014
30. Keli Sun, Chris Morriss, John Rasmus, Koji Ito, Shahzad Asif, Roger Griffiths, David
Maggs, Dzevat Omeragic, Steve Crary, Aria Abubakar, "AUTOMATED RESISTIVITY
INVERSION FOR EFFICIENT FORMATION EVALUATION IN HIGH-ANGLE AND
HORIZONTAL WELLS", SPWLA 55th Annual Logging Symposium held in Abu Dhabi,
United Arab Emirates, May 18-22, 2014
31. Olabode Ijasan, Carlos Torres-Verdin, The University of Texas at Austin; William E. Preeg,
Private Consultant; John Rasmus, Schlumberger; and Edward J. Stockhausen, Chevron
"INVERSION-BASED INTERPRETATION OF LWD RESISTIVITY AND NUCLEAR
MEASUREMENTS: FIELD EXAMPLES OF APPLICATION IN HIGH-ANGLE AND
HORIZONTAL WELLS ", SPWLA 55th Annual Logging Symposium held in Abu Dhabi,
United Arab Emirates, May 18-22, 2014
32. Ed Stockhausen, Chevron; John Rasmus, Hui Xie, Chris Morriss, Koji Ito, Roger Griffiths,
David Maggs, and Aria Abubakar, Schlumberger, “The Case For Making Conventional
Petrophysical Workflows In HAHZ Wells Obsolete”, Society of Petrophysicists and Well
Log Analysts, SPWLA 56th Annual Logging Symposium held in Long Beach, California,
USA, July 18-22, 2015.
33. Mohammad Taghi Salehi, Joan Abadie, Shahzad Asif, Koji Ito, David Maggs, Chris
Morriss, Luca Ortenzi, John Rasmus, Roger Griffiths Schlumberger, “Rapid And Practical

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Characterization Of Near-Wellbore Layer Structure And Properties In High Angle And
Horizontal Wells”, Society of Petrophysicists and Well Log Analysts, SPWLA 56th
Annual Logging Symposium held in Long Beach, California, USA, July 18-22, 2015.
34. Dean Homan, Gerald Minerbo, and John Rasmus, Schlumberger, Siddharth Misra and
Carlos Torres-Verdín, The University of Texas at Austin, “Laboratory Investigation Of
Petrophysical Applications Of Multi-Frequency Inductive-Complex Conductivity Tensor
Measurements”, Society of Petrophysicists and Well Log Analysts, SPWLA 56th Annual
Logging Symposium held in Long Beach, California, USA, July 18-22, 2015.
35. Siddharth Misra and Carlos Torres-Verdín, The University of Texas at Austin; Dean Homan
and John Rasmus*, Schlumberger, “Complex Electrical Conductivity of Shale Reservoir
Rocks – Measurement, Mechanistic Modeling, and Petrophysical Applications”,
Unconventional Resources Technology Conference (URTeC) DOI 10.15530/urtec-2015-
2163422, Unconventional Resources Technology Conference held in San Antonio, Texas,
USA, 20-22 July 2015.
6. Training Courses, conferences attended.
 Attended or taught various wireline and LWD in-house interpretation. schools. Have attended
sales technique schools.
 Presented papers at 1981, 1990, 1999 SPE, and 1985, 1986, 1988, and 2003-2014 SPWLA
conferences.
 1986-1987, 1999-2000, and 2013-2014 SPWLA Distinguished Speaker.
 Schlumberger Educational Services Instructor for Schlumberger Advanced
Petrophysics course 1986 - 1988.
7. Patents.
1. 1989 “Pore Pressure Formation Evaluation While Drilling” (USO4833914).
2. 1990 “Formation Volumetric Evaluation While Drilling” (USO4949575).
3. 1994 “Optimized Drilling With Positive Displacement Drilling Motors” ( USO5368108)
4. 1997 “Method and Apparatus for Improved Measurement of Drilling Conditions”
(USO5654503)

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5. 2005 “Method to Detect and Visualize Changes in Formation Parameters and Borehole
Condition” US06885942, US20040138818-A1
6. 2011 “Method for estimating formation permeability using time lapse measurements” US-
Patent No. 20110184711
7. 2011 “Identification of Casing Collars While Drilling and Post Drilling Using LWD and
Wireline Measurements” US Patent No. 20110290011
8. 2011 “Wall contact caliper instruments for use in a drill string” US Patent No.
20100319991
9. 2012 “Method and Apparatus for Visualizing Changes in Cylindrical Volumes” US Patent
No. 20120188236
10. 2012 “Method and Apparatus for Visualizing Multi-Dimensional Well Logging Data with
Shapelets” US Patent No. 2US20120201425
11. 2013 “Applications based on fluid properties measured downhole” 20130085675 US
Patent No 2012058392
12. 2013 “Log processing in highly deviated wellbores” US Patent No. 8473212
13. 2013 “Method of determining and utilizing high fidelity wellbore trajectory” US Patent
No. US08442769
14. 2014 “Method and apparatus for determining formation and fluid properties” US Patent
No. 08645068
15. 2014 "System And Method For Determining Movement of A Drilling Component In A
Wellbore" US Patent No. 8857510, Oct 2014
16. 2014 “Determining Correct Drill Pipe Length And Formation Depth Using Measurements
From Repeater Subs In A Wired Drill Pipe System” US Patent No. 14284668
17. 2014 “ Inversion Based Workflows for Processing Nuclear Density Images in High Angle
and Horizontal Wellbores” US Patent No. 8899349, Dec 2014
18. 2014 “Methods for determining formation strength of a wellbore” US Patent No. 8899349
Dec 2014
19. 2015 “Applications Based On Fluid Properties Measured Downhole” US NP 8965703.
Feb 2015

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20. 2015 “Multi-Dimensional Interval Well Log Display With Shapelets “ US NP 9047689,
June 2, 2015
21. 2015 “Method For Estimating Formation Permeability Using Time Lapse Measurements “
US NP 9091781, July 28, 2015
Patents Pending
1. Constant Property Intervals From Well Logs Independent Of Wellbore Deviation
2. Wellbore Centric Grid
3. Quantifying Kerogen Volume And Maturity Using Log Based Spectroscopy And Hydrogen
Index Measurements
4. Interpretation Methodologies And Calculations For Wired Drill Pipe Along String
Measurements Of Pressure And Temperature
5. Automatic Drill Pipe Length Corrections using Wired Drill Pipe Measurements
6. Fractured Core Preparation and Procedure for Induction Measurements
7. Automatic Drill Pipe Length Corrections using Certain Measurements Within Repeater
Subs
8. Dielectric and Conductivity Tensor Measurement Tool for Input into CRIM and Archies
Equation
9. Automatic Method for Three-Dimensional Structural Interpretation of Logging-While-
Drilling Images Acquired in High-Angle and Horizontal Wells
10. Remote MWD sensors using short sections of Wired Drill Pipe
11. Petrophysically-consistent calibration of full-tensor electromagnetic core-analysis tool
12. Computation of Apparent Formation Dip From Multiple Sensor Data Having Different
Depths of Investigation
13. OBM fluid induced fracture detection using axial resistivity measurements

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14. Subsurface estimation of level of organic maturity using multi-frequency complex
conductivity measurements in KHz to MHz frequency range
15. Determining Petrophysical Properties of a Earth Volume From Well Logging
Measurements
16. Method improve water saturation estimation by removing dielectric polarization effects due
to inclusions, vugs, veins, fractures, and beds on kHz-MHz electromagnetic
8. Awards.
 1983 “Best Paper Award” for the SPWLA publication, “Log Analyst” for the article “A
Variable Cementation Exponent, M, For Fractured Carbonates”.
 1991 “Best Paper Award” for the SPE publication, “Drilling Engineer” for the article “Real
Time Pore Pressure Evaluation Utilizing MWD/LWD Measurements and Drilling Derived
Formation Strength”.
 1986-87, 1999-2000, and 2013-2014 SPWLA Distinguished Speaker
 2014 "Best Paper Award" for the SPWLA Technical Syposium paper "Inversion-Based
Interpretation of Lwd Resistivity And Nuclear Measurements: Field Examples of Application
In High-Angle And Horizontal Wells ".
9. Memberships
 Professional Engineer, Petroleum, #82064 Texas
 Professional Geoscientist, #5390, Texas
 American Association of Petroleum Geologists
 Society of Petroleum Engineers
 Society of Professional Well Log Analysts

10 Professional Society Activity
 SPWLA Technical Review Committee – 2011-2014
 VP Houston Westside Chapter 2015-2016
10. Expertise.
My expertise is reflected in the subject areas that are repeatedly recognized as “strengths”
on my yearly performance appraisals. These are: knowledge of work, initiative, understanding of
product or service, creativity, oral and written communication, performance against objectives, and

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ability to work with superiors, peers and clients. These areas are strengths in part due to the fact
that I take it upon myself to learn new subject areas extensively and apply this knowledge to the
project I have been assigned. I undertake this learning in a self-motivated style, using the resources
at my disposal. The result is a thorough understanding of the physics of a measurement and the
ability to develop a new and unique way to solve a client problem with these measurements.
My downhole motor analysis project in engineering illustrates this approach. Not having
experience in downhole motor analysis, I researched positive displacement motors as well as
downhole turbines to understand their design and operational behavior. This knowledge in
conjunction with creativity allowed me to overcome two obstacles associated with the analysis of
their downhole operation while drilling - namely how to account for the change in performance for
differing mud flow rates through the motor, and how to quantify the wear in the motor that has
taken place while drilling. The result is a patented commercial product that analyses the
performance and wear of the positive displacement motor while drilling which allows our clients to
maximize their ROP thereby saving them rig costs.
The drilling interpretation experience has been a valuable addition to my extensive
experience with borehole geophysical measurements. I have found that a firm understanding of the
measurement physics is invaluable in order to develop interpretation methodologies. These
interpretations are most useful when both the petrophysical and geological properties of the
formations are considered. Geological properties of age, diagenesis, sequence stratigraphy, and
regional location need to be understood before petrophysical applications can be developed and
applied.
John C. Rasmus