Richard A. Plumb, Ph.D.

Plumb Geomechanics, LLC

14 Gerry Street, Cambridge, MA 02138

713-410-1070 (m)

rplumb@plumbgeomechanics.com www.plumbgeomechanics.com

CAREER SUMMARY

Globally recognized geoscientist with extensive experience in the development of geomechanics technology and expert

in the analysis and modeling of earth stresses and wellbore stability. Successfully built and grew a geomechanics

consulting services business which expanded company offerings and significantly increased company revenues.

Defined the corporate-wide research direction in geomechanics and led global projects from concept to successful

conclusion. Designed systems and processes that integrated geophysical measurements, across the organization, to

solve complex industry problems occurring at great depth in sedimentary basins. Extensive experience creating and

managing multi-disciplinary, cross-functional teams comprised of geoscientists and engineers.

PROFESSIONAL EXPERIENCE

Plumb Geomechanics, LLC, Cambridge, MA 2010-Present

Principal Consultant

Recent activities include:

Conducting research on anisotropic mechanical properties of mudrocks.

Conducting research on the state of stress in mudrocks at great depth

Developed geomechanics models for exploration plays in Kurdistan and Peru.

Collaborating with Akselos, Inc. on development of interactive borehole stress analysis software.

Developed e-learning materials for geomechanics education.

Teaching geomechanics courses to industry professionals.

Department of Civil & Environmental Engineering, Tufts University, Medford, MA 2016- Present

Visiting Scholar

Department of Civil and Environmental Engineering, M.I.T., Cambridge, MA 2010-2015

Research Associate, served on Ph.D. committees for 3 students.

Schlumberger Limited, Houston, TX 1981-2010

Schlumberger-Doll Research, Cambridge MA (2007-2010)

Research and Technology Advisor

Responsible for identifying and promoting geoscience research in 4D earth modeling, which lead to the development of

new technologies.

Served as research advisor to the President of Data Consulting Services and to Schlumberger’s Director of

Research.

Developed new research roadmaps for unconventional gas reservoirs and deepwater reservoirs.

Schlumberger-Oilfield Services, Houston, TX (2007-2010)

Domain Head and Career Leader, Geomechanics

Responsible for establishing geomechanics as technical domain within Schlumberger and defining the technical

competency profiles for its geomechanics engineers.

Improved competency levels of 100+ engineers worldwide who successfully met the growing demands of the

company geomechanics consulting services business.

Selected candidates for promotion to the top 10% of Schlumberger’s technical talent.

Richard A. Plumb, 2016 Page 2

Schlumberger Data Consulting Services (DCS), Houston, TX (2001-2007)

Domain Head, Geomechanics

Responsible for global commercialization of the DCS geomechanics services business.

Achieved annual revenue growth of 30%+ for DCS plus significant pull-through revenue for other business

segments.

Established the technical direction of the geomechanics consulting services, business.

Set requirements and specifications for geomechanics software, defined commercial products, and developed

marketing plans.

Instrumental in acquisition of Terra Tek and V.I.P.S. creating a unique earth modeling capability for

Schlumberger.

Established a hub-and-spoke structure to deliver geomechanics expertise to 26 worldwide geomarkets.

Schlumberger Holditch Reservoir Technologies, Houston, TX (1999-2001)

Manager, Geomechanics Consulting Services

Responsible for establishing a profitable commercial geomechanics services business in Schlumberger.

Established and managed two multi-disciplinary teams located in Houston, TX and Gatwick, England.

Disciplines included: rock mechanics, geophysics, structural geology, petrophysics and drilling engineering.

Established consulting workflows and business models, which achieved a global track record of delivering

high value to our clients.

Schlumberger Integrated Project Management Support Center (IPM), Houston, TX (1997-1999)

Geology and Geophysics Advisor

Responsible for managing the geological and geophysical aspects of IPM field development projects.

Identified and applied technology that minimized project risk and optimized field productivity on IPM drilling

contracts.

Conducted project risk evaluations and integrated geomechanics into well construction and field development

planning. Major projects included the Hibernia Field, offshore Canada, exploration wells in the deepwater Gulf

of Mexico, and exploration wells in Argentina, Colombia, and Venezuela.

Schlumberger Integrated Project Management Engineering (IPM), Houston, TX (1996-1997)

Team Leader, Geomechanics

Responsible for transferring lessons learned from the Cusiana field case study to IPM’s well construction business.

Created the position of Geomechanics Engineer and recruited the first Ph.D. geoscientist for this position. The

geomechanics team provided technical support to IPM drilling engineers worldwide.

Improved drilling performance and increased IPM profitability $7 million in the first year.

Schlumberger Cambridge Research, Cambridge, England (1992-1996)

Senior Scientist, Geomechanics Department

Responsible for field case studies on wellbore stability and sand control.

Conducted case studies in Venezuela, China, Italy and Colombia. Foremost was the Cusiana case study run for

3 years with British Petroleum (BP).

Diagnosed and helped to solve one of the world’s most challenging wellbore stability problems (Cusiana),

saving BP more than $10,000,000 in well construction costs over a 2 year period.

Schlumberger-Doll Research, Ridgefield, CT (1981-1992)

Research Scientist, Interpretation Department

Conducted basic research on earth stress and natural fracture characterization using new borehole

measurement technologies.

Co-inventor of the wireline stress measurement tool (MDT).

Conceived and developed the first interactive software enabling geological mapping with borehole images.

Richard A. Plumb, 2016 Page 3

EDUCATION

1982 Ph.D., Geophysics, Columbia University, New York, NY

1980 M.Phil., Geophysics, Columbia University, New York, NY

1974 M.A., Geology, Dartmouth College, Hanover, NH

1971 A.B., Physics and Geology, Wesleyan University, Middletown, CT

AWARDS

“Performed by Schlumberger” Award for No Drilling Surprises

Data Consulting Services President’s Award for Excellence in Leading the Geomechanics Domain

PROFESSIONAL AFFILIATIONS

American Geophysical Union

American Rock Mechanics Association

Society of Petroleum Engineers

PATENTS

6 U.S. Patents pertaining to measurement of earth stress and natural fracture characterization.

PUBLICATIONS

36 in Academic Journals and Books

39 in Industry Journals

86 Confidential Schlumberger Publications

SELECTED PUBLICATIONS

Miller, D., Plumb, R., and G. Boitnott (2013), Compressive strength and elastic properties of a transversely isotropic

calcareous mudstone, Geophysical Prospecting, 61, 315-328.

Birchwood, R. A., Noeth, S., Tjengdrawira, M.A., Kisra, S.M., Elisabeth, F.L., Sayers, C.M. , Singh, R., Hooyman,

P.J., Plumb, R.A., Jones, E., and Bloys, J.B. (2007), Modeling the mechanical and phase change stability of wellbores

drilled in gas hydrates by the Joint Industry Participation Program (JIP) Gas Hydrates Project, Phase II. SPE Paper No.

110796, Presented at the Society of Petroleum Engineers Annual Technical Conference and Exhibition, Anaheim,

California, November 11-14.

Sodgren, T.L., Suarez-Rivera, R. and R. A. Plumb (2005), Rock Mechanics Database Significantly Improves Pre-Drill

Operational Risk Analyses, Paper ARMA/USRMS 05-825, presented at Alaska Rocks 2005, The 40th U.S. Symposium

on Rock Mechanics (USRMS): rock Mechanics for Energy, Mineral and Infrastructure Development in the Northern

Regions, Anchorage, Alaska, June 25-29.

Plumb, R.A., Hooyman, P., Veeningen, D., Dutta, N., Ritchie, G., and K. Bennaceur, (2004), A New Geomechanics

Process Reduces Operational Risk From Exploration to Production, Paper ARMA/NARMS 04-616, presented at Gulf

Rocks 2004, 6th North America Rock Mechanics Symposium (NARMS): Rock Mechanics Across Borders and

Disciplines, Houston, Texas, USA, June 5–9.

Plumb, R.A., Edwards, S.E., Pidcock, G., and D. Lee (2000), The Mechanical Earth Model and its Application to High-

Risk Well Construction Projects, SPE Paper No. 59128, presented at the 2000 IADC/SPE Drilling Conference, New

Orleans, Louisiana, Feb 23-25.

Richard A. Plumb, 2016 Page 4

Last, N., Plumb, R.A., and R. Harkness (1998), From Theory to Practice: An Evaluation of the Stress Distribution for

Wellbore Stability Analysis in an Overthrust Regime by Computational Modeling and Field Calibration, SPE/ISRM

Paper 47209, Eurock 98, Trondheim, Norway, July 8-10.

Plumb, R.A., Papanastasiou, P., and N. Last (1998), Constraining the State of Stress in Tectonically Active Settings,

SPE/ISRM Paper 47240, Eurock 98, Trondheim, Norway, p. 179-187, July 8-10.

Last, N., Plumb, R.A., Harkness, R., Charlez, P., Alsen, J., and M. Mclean (1995), An Integrated Approach to

Evaluating and Managing Wellbore Instability in the Cusiana Field, Colombia South America, SPE Paper No. 30464,

Annual Fall Technical Conference, Dallas, TX, p. 147-159, 22-25,Oct.

Plumb, R.A., (1994), Influence of composition and texture on the failure properties of clastic rocks, in Rock Mechanics

in Petroleum Engineering, Eurock 94, Proceedings SPE/ISRM International Conference, Delft, Netherlands, August 29-

31.

Plumb, R.A. (1994), Variations of the least horizontal stress magnitude in sedimentary rocks, in Rock Mechanics

Models and Measurements Challenges from Industry, Nelson & Laubach (eds.), Proceedings of the 1st North American

Rock Mechanics Symposium, Univ. of Texas, Austin, June 1-3.

Thiercelin, M.J., Plumb, R.A., Desroches, J., Bixenman, P.W., Jonas, J.K., and W.A.R. Davie (1993), A new wireline

tool for in-situ stress measurements, SPE Paper No. 25906, Proceedings SPE Rocky Mountain /Low Permeability

Reservoirs Symposium, Denver, CO., April 12-14.

Plumb, R. A., Herron, S. L., and M.P. Olsen (1992), Influence of composition and texture on compressive strength

variations in the Travis Peak formation, SPE Paper No. 24758 presented at the 1992, SPE Annual Technical

Conference and Exhibit, Washington, D.C., Oct. 4-7.

Herron, S.L., Herron, M.M. and Plumb, R.A. (1992), Identification of Clay Supported and Framework Supported

Domains from Geochemical and Geophysical Well Log Data, SPE Paper No. 24726 presented at the 1992 SPE Annual

Technical Conference and Exhibition, Washington, DC, Oct. 4-7.

Plumb, R. A. (1992), Stress magnitudes in sedimentary basins: Relationship to lithology, pore pressure and geologic

setting, SDR Research Note, ISD-001, 92/12, February 13.

Thiercelin, M.T., and R.A. Plumb (1991), A core-based prediction of lithologic stress contrasts in East Texas

formations, SPE Rock Mountain Regional/Low Permeability Reservoirs Symposium, Denver, CO, U.S.A., April Oct.

15-17.

Plumb, R. A., Evans, K. F., and T. Engelder (1991), Geophysical log responses and their correlation with bed-to-bed

stress contrasts in paleozoic rocks, Appalachian Plateau, New York, J. Geophys. Res., 96, p. 14,509-14,528.

Plumb, R. A. (1990), Stress magnitudes in the North Sea, SDR Research Note, ISD-002, 90/29, August 28.

Evans, K. F., Engelder, T., and R. A. Plumb (1989), Appalachian stress study, 1, A detailed description of stress

variations in Devonian shales of the Appalachian Plateau, J. Geophys. Res., 94, p. 7129-7154.

Plumb, R. A. and S. M. Luthi (1989), Analysis of Borehole Images and Their Application to Geologic Modeling of an

Eolian Reservoir, Soc. Petr. Eng. Formation Evaluation, 4, 505-514.

Hornby, B.E., Johnson, D., Winkler, K., and R. A. Plumb (1989), Fracture Evaluation From the Borehole Stoneley

Wave, Geophysics, 54, 10, 1274-1288.

Richard A. Plumb, 2016 Page 5

Plumb, R.A. (1989), Fracture Patterns Associated with Incipient Wellbore Breakouts, in Proceedings ISRM-SPE

International Symposium "Rock at Great Depth", edited by V. Maury and D. Fourmaintraux, Balkema, Rotterdam, 2,

761-768.

Hsu, K., Brie, A. and R. A. Plumb (1987), A New Method for Fracture Identification Using Array Sonic Tools, Jour.

Petroleum Tech., 677-684.

Plumb, R. A., and J. Cox (1987), Stress directions in eastern North America determined to 4.5 km from borehole

elongation measurement, J. Geophys. Res., 92, 4805-4816.

Plumb, R. A., and S.H. Hickman (1985), Stress Induced Borehole Elongation: A Comparison Between the Four-Arm

Dipmeter and the Borehole Televiewer in the Auburn Geothermal Well, J. Geophys. Res., 90, 5513-5522.

Engelder, T., and R.A. Plumb (1984), The Relationship Between In-Situ Ultrasonic Properties of Rock and In-Situ

Stress, Int. Jour. Rock Mech., 21, 2, 78-82.

Plumb, R.A., Engelder, T., and M. L. Sbar (1984), The Comparison Between Stress Directions in Outcrops and Those

Inferred From Earthquakes Near Blue Mountain Lake, New York, J. Geophys. Res., 89, 9333-9349.

Plumb, R.A., and J. Singer (1983), Insights Into the Mechanical Properties of Tight Formations: A Study of In-Situ

Stress and Fracture Distribution at Auburn, New York, Final Report to New York State Energy Research and

Development Authority, pp. 26.

Sbar, M.L., Engelder, T., Plumb, R.A., and S. Marshak (1979), Stress Pattern Near the San Andreas Fault, Palmdale,

California, From Near Surface In-Situ Measurements, J. Geophys. Res., 84, 156-164.