David Paul Craig, PhD, PE 14459 Williams St. Thornton, CO 80602 (303) 725-3722

Education

Texas A&M University, College Station, Texas Petroleum Engineering, Ph.D., May 2006 Overall GPR = 3.837/4.0, GPR (Major) = 4.0/4.0 May 2000 − May 2006

Colorado School of Mines, Golden, Colorado Petroleum Engineering, Ph.D. − Part-time Student Overall GPA = 4.000/4.0, GPA (Major) = 4.0/4.0 January 1998 − May 1999 Texas A&M University, College Station, Texas Petroleum Engineering, Master of Science, December 1991 Overall GPR = 3.895/4.0, GPR (Major) = 4.0/4.0 January 1990 – May 1992 Texas Tech University, Lubbock, Texas Petroleum Engineering, Bachelor of Science, December 1989 Overall GPA = 3.715/4.0, GPA (Major) = 4.0/4.0 Magna Cum Laude; September 1985 – December 1989

Experience Anadarko Petroleum Corporation, Denver, Colorado, November 2012 – February 2016

Full-Time In-House Consultant providing reservoir engineering support to all Anadarko Petroleum Corporation unconventional assets, which included Wattenberg, Eagle Ford, Delaware Basin, and the Powder River Basin. Technical support included well test planning and analysis, well completion and fracture-treatment optimization, rate-transient analysis, reservoir simulation, and integrated studies to establish optimal horizontal well spacing.

Reservoir Development Consulting/DFITpro.com, Denver, Colorado, September 2007 – Present

Owner, Denver, Colorado, September 2007 – Present Reservoir Development Consulting, RDC, was created to provide expert diagnostic fracture-injection/falloff test (DFIT) analysis and commercialize a new process for identifying, evaluating, and stimulating bypassed zones in horizontal wells or ineffectively-stimulated layers in wells producing from multiple layers. Reservoir Development Consulting also developed a method for identifying the number of producing fractures in a multifractured horizontal well based on observed intrawell interference effects. DFITpro.com was created to allow state-of-the-art DFIT analysis using the Cloud SaaS model (Software as a Service). The software engine resides on a server (Azure Platform) and a user interacts with the software via a web browser. The DFITpro.com software engine is unique in that it is written to take advantage of massively-parallel computations provided by NVIDIA GPUs used for general-purpose computing. Additional modules include Multifrac ProD, which provides both traditional rate-transient analysis capabilities along with the new intrawell interference diagnostics for determining the number of producing fractures in a multifractured horizontal well.

Halliburton Energy Services, Denver, Colorado, March 1996 – August 2007 & September 2008 − November 2012

Chief Engineer−Unconventional Reservoir Technology, Denver, Colorado, September 2008 – November 2012 Developed a new mathematical model for complex-fracture propagation.

Sr. Technical Advisor, Denver, Colorado, January 2004 – August 2007 Develop new products and services, research, and internal and external technology transfer. Sr. Technical Specialist, College Station, Texas, May 2000 – December 2003 Complete field studies, provide engineering support, develop new engineering products, and develop prototype software. Technical Specialist, Denver, Colorado, March 1998 – May 2000 Complete field studies, provide engineering support, and implement state-of-the-art completion techniques for United States Western Region. Prepare and present proposals for in-house account teams. Technical Advisor II, Denver, Colorado, March 1996 – March 1998 In-house engineer for Barrett Resources Corporation responsible for all Rocky Mountain Region stimulation treatment designs, fracture treatment analyses, well completion recommendations, completion optimization studies, preparing customer presentations, taught customer fracture modeling schools, and maintaining on-site quality control program.

The Western Company/BJ Services, February 1994 – March 1996

Technical Representative, Denver, Colorado, July 1995 – March 1996 In-house engineer for Barrett Resources Corporation. Designed all Rocky Mountain Region stimulation treatments, analyzed fracture treatment data, provided well completion recommendations, and implemented on-site quality control program.

Group Leader – Fracturing, Houston, Texas, February 1994 – July 1995 Directed hydraulic fracturing research, supervised Fracturing Group personnel, provided engineering support for stimulation treatment design and post-treatment analysis, provided field support for chemical products, prepared and presented customer seminars on hydraulic fracturing treatment design and optimization, taught in-house stimulation schools, prepared budgets, and wrote ISO 9001 documentation.

Honors Texas A&M University 2006 Award of Excellence for Outstanding Research at the Doctoral Degree Level Awarded Amoco/Chevron Fellowship for 1990. Elected Well Stimulation Representative to the Petroleum Engineering Graduate Student Organization. Society of Petroleum Engineers, Denver Section 2000 Henry Mattson Technical Service Award Texas Tech University Graduated Magna Cum Laude. Elected Gaston Hall Wing Representative. President’s List: Fall 1987, Fall 1988, and Spring 1989. Dean’s List: Fall 1985, 1987, and 1988; Spring 1988 and 1989.

Professional Certifications Colorado Registered Professional Engineer License Number 35143 ISO 9001 Certified Lead Auditor Certificate No. 736 – Irish Quality Association

Patent or Patent Applications Craig, D.P.:"Methods and Apparatus for Estimating Physical Parameters of Reservoirs Using Pressure Transient Fracture-Injection/Falloff Test Analysis," United States Patent, US 7,054,751, 30 May 2006. Craig, D.P.:"Methods and an Apparatus for Detecting Fracture With Significant Residual Width From Previous Treatments," United States Patent 7,774,140 B2, 10 August 2010. Craig, D.P.:"Methods and Systems for Determining Reservoir Properties of Subterranean Formations," United States Patent 7,272,973 B2, 25 September 2007. Craig, D.P.:"Methods and Systems for Determining Reservoir Properties of Subterranean Formations With Pre-Existing Fractures," United States Patent, 7,389,185, 17 June 2008. Craig, D.P.:"Refracture-Candidate Evaluation and Stimulation Methods," United States Patent, US 8,794,316, 05 August 2014. Craig, D.P.:"Simulating Subterranean Fracture Propagation," United States Patent, 8,898,044, 25 Nov 2014. Craig, D.P.:"Refining Information on Subterranean Fractures," United States Patent Application, US 2011/0120706 A1, 26 May 2011. Craig, D.P.:"Generating Probabilistic Information on Subterranean Fractures," United States Patent, 8,437962, 07 May 2013. Craig, D.P.:"Probabilistic Earth Model for Subterranean Fracture Simulation," United States Patent, 8,392,165, 05 March 2013. Craig, D.P.:"Probabilistic Simulation of Subterranean Fracture Propagation," United States Patent, 8,386,226, 26 February 2013.

Peer-Reviewed Publications Barree, R.D., Barree, V.L., and Craig, D.P.:"Holistic Fracture Diagnostics: Consistent Interpretation of Prefrac Injection Tests Using Multiple Analysis Methods," SPE Prod & Opers Journal (August 2009). Craig, D.P., Eberhard, M.J., Ramurthy, M., Odegard, C.E., and Mullen, R.:"Permeability, Pore Pressure, and Leakoff-Type Distributions in Rocky Mountain Basins," SPEPF (February 2005) 48. Technical Papers Craig, D.P. and Jackson, R.A.: "Depth-of-Investigation and Volume-of-Investigation Calculated from Fracture-Injection/Falloff Test (DFIT) Data," paper SPE 185029 to be presented at the 2017 Canada Unconventional Resources Conference, Calgary, Alberta, Canada, 15-16 February 2017. Craig, D.P. and Jackson, R.A.: "Calculating the Volume of Reservoir Investigated During a Fracture-Injection/Falloff Test (DFIT)," paper SPE 184820 to be presented at the 2017 Hydraulic Fracturing Technology Conference, The Woodlands, Texas, 24-26 January 2017. Tompkins, D., Persac, S., Craig, D.P., and Birdwell, J.J.: “Nitrogen Fracture-Injection/Falloff Testing and Analysis in Underpressured Reservoirs,” paper URTeC 2461218 presented at the 2016 Unconventional Resources Technology Conference (URTeC), DOI10.15530-urtec-2016-2461218. Craig, D.P.:"New Type Curve Analysis Removes Limitations of Conventional After-Closure Analysis of DFIT Data," paper SPE 168988 presented at the 2014 SPE Unconventional Resources Conference – USA, The Woodlands, Texas, 01-03 April 2014.

Craig, D.P. and Burkhart, R.:"Using Maps of Microseismic Events to Define Reservoir Discontinuities," paper SPE 135290 presented at the 2010 SPE Annual Technical Conference and Exhibition, Florence, Italy, 19-22 September. Barree, R.D., Barree, V.L., and Craig, D.P.:Synopsis of "Holostic Fracture Diagnostics,"JPT (March 2008) 67-68. Craig, D.P. and Odegard, C.E.:"Identifying Bypassed and Ineffectively Stimulated Layers In A Well With Commingled Production From Multiple Layers: Mesaverde Case History," paper SPE 114777 presented at the 2008 SPE Unconventional Reservoirs Conference, Keystone, Colorado, 10-12 February 2008. Barree, R.D., Barree, V.L., and Craig, D.P.:"Holostic Fracture Diagnostics," paper SPE 107877 presented at the 2007 SPE Rocky Mountain Oil & Gas Technology Symposium, Denver, Colorado, 16-18 April 2007. Craig, D.P. and Blasingame, T.A.:"Constant-Rate Drawdown Solutions Derived for Multiple Arbitrarily-Oriented Uniform-Flux, Infinite-Conductivity, or Finite-Conductivity Fractures in an Infinite-Slab Reservoir," paper SPE 100586 presented at the 2006 SPE Gas Technology Symposium, Calgary, Alberta, Canada, 15-17 May 2006. Craig, D.P. and Blasingame, T.A.:"Application of a New Fracture-Injection/Falloff Model Accounting for Propagating, Dilated, and Closing Hydraulic Fractures," paper SPE 100578 presented at the 2006 SPE Gas Technology Symposium, Calgary, Alberta, Canada, 15-17 May 2006. Craig, D.P. and Blasingame, T.A.:"A New Refracture-Candidate Diagnostic Test Determines Reservoir Properties and Identifies Existing Conductive or Damaged Fractures," paper SPE 96785 prepared as an alternate for the 2005 SPE Annual Technical Conference and Exhibition, Dallas, Texas, 09-12 October 2005. Soliman, M.Y., Craig, D., Bartko, K., Rahim, Z., and Adams, D.:"After-Closure Analysis to Determine Formation Permeability, Reservoir Pressure, and Residual Fracture Properties," paper SPE 93419 presented at the 2005 SPE Middle East Oil & Gas Show and Conference, Bahrain, 12-15 March 2005. Craig, D.P., Eberhard, M.J., Ramurthy, M., Odegard, C.E., and Mullen, R.:"Permeability, Pore Pressure, and Leakoff-Type Distributions in Rocky Mountain Basins," paper SPE 75717 presented at the 2002 Gas Technology Symposium, Calgary, Alberta, Canada, 30 April – 02 May 2002. Craig, D.P., Odegard, C.E., Pearson, W.C., Jr., Schroeder, J.E.: “Case History: Observations From Diagnostic Fracture Injection Tests in Multiple Pay Sands of the Mamm Creek Field, Piceance Basin, Colorado,” paper SPE 60321 presented at the 2000 SPE Rocky Mountain Regional/Low Permeability Reservoirs Symposium, Denver, Colorado, 12-15 March 2000. Craig, D.P., Eberhard, M.J., Barree, R.D.: “Adapting High Permeability Leakoff Analysis to Low Permeability Sands for Estimating Reservoir Engineering Parameters,” paper SPE 60291 presented at the 2000 SPE Rocky Mountain Regional/Low Permeability Reservoirs Symposium, Denver, Colorado, 12-15 March 2000. Craig, D.P. and Brown, T.D.: Synopsis of “Estimating Pore Pressure and Permeability in Massively Stacked Lenticular Reservoirs Using Diagnostic Fracture Injection Tests,” JPT (November 1999) 52-53. Craig, D.P. and Brown, T.D.: “Estimating Pore Pressure and Permeability in Massively Stacked Lenticular Reservoirs Using Diagnostic Fracture Injection Tests,” paper SPE 56600 presented at the 1999 SPE Annual Technical Conference and Exhibition, Houston, Texas, 3-6 October 1999.

Craig, D.P., Brown, T.D., and Ely, J.W.: “Field Investigation of Heat Transfer in Hydraulic Fractures and the Effect of Heat Transfer on Fracturing Fluid Design,” paper SPE 36494 presented at the 1996 SPE Annual Technical Conference and Exhibition held in Denver, Colorado, U.S.A., October 1996. Craig, D.P., Fan, Y., and Holditch, S.A.: “Viscous Property Measurement of Delayed Titanate Crosslinked Gels Containing Oxidative Breakers,” paper SPE 24340 presented at the 1992 SPE Rocky Mountain Regional Meeting, Casper, Wyoming, May 18-21, 1992. Craig, D.P., Holditch, S.A., and Howard, B.: “The Degradation of Hydroxypropyl Guar Fracturing Fluids by Enzyme, Oxidative, and Catalyzed Oxidative Breakers,” presented at the 39th Southwestern Petroleum Short Course, Lubbock, Texas, April 22-23, 1992. Craig, D.P.: “The Degradation of Hydroxypropyl Guar Fracturing Fluids by Enzyme, Oxidative, and Catalyzed Oxidative Breakers,” Master of Science Thesis, Texas A&M University, December 1991. Blauer, R.E., Phillips, A.M., and Craig, D.P.: “Rheological and Physical Differences Between Foam and Emulsion Fracturing Fluids,” paper SPE 18214 presented at the 1988 SPE Annual Technical Conference and Exhibition, Houston, Texas, October 2-5, 1988