P. P. Valkó, Professor

Harold Vance Department of Petroleum Engineering, Texas A&M University

TAMU 3116, College Station, TX 77843-3116

phone: (1) - (979) - 862-2757

web page: http://www.pe.tamu.edu/valko

Academic Degrees

Degree	Field	Institution	Date
Ph.D. equiv.¹	Chemical Engineering	Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences (then USSR), Novosibirsk	1981
M.S. equiv.²	Systems Engineering/ Applied Mathematics	Veszprém University, Hungary	1975
B.S. equiv.³	Chemical Engineering	Veszprém University, Hungary	1973
¹Degree of "Candidate of Sciences in Technical Chemistry", Russia ²Degree of “Doctor Technicus in Applied Mathematics”, Hungary ³Degree of “Diplom Engineer in Chemical Engineering”, Hungary

Professional experience

2006 -	Full Professor (TAMU)
2001- 2006	Associate Professor (TAMU)
1993- 2000	Visiting Associate Professor and Visiting Research Scientist Texas A&M University (TAMU) College Station, Texas
1991-93	Assistant Professor Institute of Drilling and Production, Mining University Leoben, Austria
1989-91	Senior Research Scientist Hungarian Hydrocarbon Institute, (MOL Plc) Budapest, Hungary
1987-88	Associate Professor ELTE
1981-86	Assistant Professor (Adjunct) ELTE
1977-80	Thesis Scholar Institute of Catalysis of the (then) Soviet Academy of Sciences, Novosibirsk, Russia
1975-76	Teaching Assistant Chemical Cybernetics Department, Eötvös Loránd University, (ELTE) Budapest, Hungary

Research Interests

Design and evaluation of hydraulic fracture stimulation treatments;
Rheology of fracturing fluids;
Performance of advanced and stimulated wells;
Modeling, identification and optimization including the underlying numerical techniques;
Numerical Laplace transform inversion;

Honors

ConocoPhillips fellow, 2006, Texas A&M Engineering Program

Courses Taught

A. Graduate

PETE 629 Advanced Hydraulic Fracturing
PETE 602 Well Stimulation
PETE 689 Flow in Porous Media with Mathematica
PETE 689 Conservation and Transport in Petroleum Engineering
PETE 685 continuously

B. Undergraduate

(ENGR109 phased out)
(PETE 414 phased out)
ENGR 212 Conservation Principles in Thermal-Fluid Sciences
PETE 211 Petrophysics
PETE 301 Numerical Methods in PETE
PETE 314 Transport Processes in Petroleum Production
PETE 324 Well Performance
PETE 410 Well Completion and Stimulation

Student Research Advising

A1. Masters (Chair, co-chair)

Vijay Moras, 2000 (currently Schlumberger)
Javier Franquet, 2001 (Baker-Hughes)
Romero, Diego, 2001 (El Paso P.C., Marathon, )
Picon, Oscar (MENG, in Venezuela with PDVSA)
Miranda, Ivan (MENG, in Peru with a small company)
Mursal, Mursal (in Malaysia with Chevron)
Khirinditi, Prasaad (US)
Jacob, Suresh (US)
Canon, Javier (Scanpower, US)
Awoyomi, Kunle (MENG)
Sarfare, Manoj Dnyandeo (with Shell)
Hongqiao, Jia
Atse, Jean-Philipe (MENG, France)
Lopez , Henry (PhD program Colorado School of Mines)
Ilk, Dilhan (now in PhD program)
Alghamdi, Abdulwahab (now in PhD program)
Wang, Wenxin

current:

Kanneganti, Kousic
Kumar, Amrendra
Alotaibi, Mohammed

A2. Masters (Committee member)

Akbarnejad Nesheli, Babak
Patel, Chiraq
Ovalle, Adriana

B1. Doctorate (Chair, Co-chair)

Winkler, Wolfgang (A&M plus Leoben, Austria)
Escobar, Elena M. (currently with PEDEVESA)
Zambrano , Orlando (with Dr Russell, he is currently with Univ. of Zulia, Venezuela)
Li , Xiangjie (with Dr Russel, currerntly Geomechanics-Internationa)

current:

Daal, Johan (with C. Economides)
Kaul, Sandeep
Shahram, Amini (with T. Blasingame)
Ilk, Dilhan (with T. Blasingame)

B2. Doctorate (Committee member)

Diyashev, Ildar (2005)
Craig, David (2006)
Kenawy, Walid (2005)
Kulchanyavivat, Sawin (2005)
Viloria, Marilyn (2006)
Urthaler Lapeira, Yetzirah Yksya

Funded Research Projects

A. TEES current

		Main PI?			Start	Status
34360	PE	No	JIP - Stimulation in Middle-East Carbonates	Schlumberger, Inc.	01-SEP-05	Active
35340	PE	No	Joint Industry Research Program for Stimulation of Middle-East Carbonates Reservoir	Qatar Petroleum	01-SEP-05	Active
34380	PE	No	JIP - Stimulation in Middle-East Carbonates	Exxon Mobil Exploration Company	01-SEP-05	Active
35040	PE	No	Joint Industry Project Agreement - Stimulation in Middle-East Carbonates	ConocoPhillips Company	01-SEP-05	Active
34860	PE	No	Joint Industry Project - Stimulation in Middle-East Carbonates	B.J. Services	01-SEP-05	Active
34850	PE	No	Joint Industry Project - Stimulation in Middle-East Carbonates	Occidental Petroleum of Qatar Ltd.	01-SEP-05	Active
36070	PE	Yes	Post-evaluation Method for Hydraulic Fracturing	Korea National Oil Corporation	01-JUL-06	Active

B. TEES previous

		Main PI?			Start	Status
31010	PE	Yes	Resortia: University - Industry Cooperative Research Program for Frac and Pack Technology	Halliburton Services	01-MAY-95	Closed
31030	PE	Yes	Resortia: University - Industry Cooperative Research Program for Frac and Pack Technology	BP Exploration, Inc.	01-MAY-95	Closed
31050	PE	Yes	Resortia: University - Industry Cooperative Research Program for Frac and Pack Technology	Chevron Oil Company	01-MAY-95	Closed
62110	PE	No	Evaluation of Hydraulic Fracture Effectiveness in Tight Gas Reservoirs	El Paso Production Company	01-AUG-00	Closed
58820	PE	Yes	Development of a Novel Methodology for Stress and Stability Related Measurements in Boreholes	University of Houston	01-MAY-99	Closed
53930	PE	Yes	Hydraulic Fracturing - Designing for Maximum Performance Incorporating Technical Constraints	El Paso Production Company	01-AUG-03	Closed
49720	PE	Yes	Development of New Diagnostics for Closure Pressure Selection	Halliburton Services	01-AUG-96	Closed
31060	PE	Yes	Resortia: University - Industry Cooperative Research Program for Frac and Pack Technology	Shell Development Company	01-MAY-95	Closed
31070	PE	Yes	Resortia: University - Industry Cooperative Research Program for Frac and Pack Technology	B.J. Services	01-MAY-95	Closed
31080	PE	Yes	Resortia: University-Industry Cooperative Research Program for Frac & Pack Technology	Pennzoil Exploration & Production Co	01-MAY-95	Closed
31090	PE	Yes	Resortia: University-Industry Cooperative Research Program for Frac & Pack Technology	Conoco, Inc.	01-MAY-95	Closed
31120	PE	Yes	University-Industry Cooperative Research Program for Frac & Pack Technology	Gas Research Institute	01-NOV-99	Closed
5888K	PE	No	Development of a Blowout Intervention Method and Dynamic Kill Simulated for Blowouts Occurring in Ultra-Deepwater - Task 18132	US DOI - Minerals Management Service	15-MAY-01	Closed
25090	PE	Yes	Design and Evaluation of Hydraulic Fracturing Treatments for Unconventional Oil and Gas	Korea National Oil Corporation	20-APR-05	Closed
66880	PE	Yes	Reservoir Applications of New Multilateral Field Drainage Architectures and Related Technologies	Providence Technologies, Inc.	01-JAN-02	Closed

C. A&M Fundation current

Donation to A&M Fundation: Sponsor: RockWell 2005 Fall $ 50,000 No. of grad students supported: 1

Service

I have been taking care of the Resource Center of the Department. The Resource Center project is an ongoing effort to make electronic and hard copy resources available for research and study. Also, I am a liaison of the Department for the Evans Library.

Departmental Commitees:

(Computer Committee, phased out)
Undergraduate Curriculum Committee
Faculty Search Committee

Other professional activities

· Member SPE (Society of Petroleum Engineers)

· Previous Member of the Editorial Board of the most scholarly and most thoroughly refereed Journal of the Society of Petroleum Engineers: SPE Journal

From time to time I am requested to do a review for the

Journal of Petroleum Science and Engineering
International Journal of Numerical & Analytical Methods in Geomechanics
Journal of Rheology
Colloids and Surfaces A
Computers and Chemical Engineering
AIChE J
Transactions of ACM
Journal of Computational and Applied Mathematics
International Journal of Thermal Sciences (THESCI)

Industry course teaching:

Hydraulic Fracturing (Lima, Peru, 2006)
TAMU Frac School (College Station, Denver, Banff, etc. 3-4/year )
Hydraulic Fracturing Design and Quality Control, NEXT course (2001 and 2002)
Hydraulic Fracturing Design, Houston, Corpus Christi ,El Paso (2001)
Stavanger, Norway for Phillips (2001)
Lake Maracaibo, Venezuela for INTEVEP (2001)

Publications

Refereed Journal Papers

1. Spivey, J. P., Valkó, P. P. and William. D. McCain, Jr.:, Applications of the Coefficient of Isothermal Compressibility to Various Reservoir Situations With New Correlations for Each Situation, SPE Reservoir Evaluation & Engineering, accepted for publication 2007. [pdf]

2. Ilk, D., Valkó, P.P. and Blasingame, T.A.: Deconvolution of Variable-Rate Reservoir-Performance Data Using B-Splines, SPE Reservoir Evaluation & Engineering, vol 9, 2006, pp 582-595. [pdf]

3. Ibragimov, A., Khalmanova, D., Valkó, P.P., Walton, J.R.: On a mathematical model of the productivity index of a well from reservoir engineering, SIAM J. Appl. Math, Vol 65 (Iss 6) 2005 pp 1952-1980. [pdf]

4. Yi, X., Valkó, P.P., Russell, J.: Effect of Rock Strength Criterion on the Predicted Onset of Sand Production, Int. J. Geomechanics, Vol 5 (Iss 1) 2005 pp 66-73. [pdf]

5. Valkó, P.P.Solution of the Graetz–Brinkman problem with the Laplace transform Galerkin method, Int. J. Heat Mass Transfer, Vol. 48 (Iss. 9) 2005 pp. 1874-1882. [pdf]

6. Valkó, P.P. and Abate, J. Numerical inversion of 2-D Laplace transforms applied to fractional diffusion equations, Applied Numerical Mathematics, Vol. 53 (Iss. 1) 2005 pp. 73-88. [pdf]

7. Jourine, S., Valkó, P.P. and Kronenberg, A.K.: Modelling poroelastic hollow cylinder experiments with realistic boundary conditions. International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 28 (Iss 12) 2004, pp 1189–1205. [pdf]

8. Valkó, P.P. and Abate, J. : Comparison of Sequence Accelerators for the Gaver Method of Numerical Laplace Transform Inversion, Computers and Mathematics with Application, Vol. 48 (Iss.3-40) 2004 pp. 629-636. [pdf]

9. Abate, J. and Valkó, P.P.: Multi-precision Laplace transform inversion, International Journal for Numerical Methods in Engineering, Vol. 60 (Iss. 5-7) 2004, pp 979–993. [pdf]

10. Valkó, P.P. and Abate, J.: Numerical Laplace inversion in rheological characterization, Journal of Non-Newtonian Fluid Mechanics, Vol. 116 (Iss. 2-3) 2004, pp 395–406. [pdf]

11. Valkó, P.P. and McCain, W.D. Jr.: Reservoir oil bubblepoint pressures revisited; solution gas–oil ratios and surface gas specific gravities, Journal of Petroleum Science and Engineering, vol. 37 (2003) pp. 153 – 169. [pdf]

12. Romero, D.J. Valkó, P.P and Economides, M J.: The optimization of the productivity index and the fracture geometry of a stimulated well with fracture face and choke skins, SPE Production and Facilities, (February) 2003, pp 57-63. [pdf]

13. Zambrano-Mendoza, O. , Valkó, P. P. and Russell, J. E.: Error-in-variables for rock failure envelope, International Journal of Rock Mechanics and Mining Sciences, Volume 40, (Issue 1, January) 2003, pp. 137 - 143. [pdf]

14. Valkó, P.P. and Vajda S.: Inversion of Noise-Free Laplace Transforms: Towards a Standardized Set of Test problems, Inverse Problems in Engineering, (Taylor & Francis) Volume 10 (Number 5) 2002, pp. 467 – 483. [pdf]

15. Economides, M.J., Valkó, P.P., and Wang, X.: Recent Advances in Production Engineering, Journal of Canadian Petroleum Engineering, Vol. 40 (10) pp. 35-44, 2001.

16. Wu, C.H., Soto, R.D. , Valkó P.P. and Bubela, A.M.: Non-parametric regression and neural-network infill drilling recovery models for carbonate reservoirs, Computers & Geosciences 26 (2000) pp 975-987 [pdf]

17. Valkó, P. P. , Doublet L. E. and Blasingame, T. A.: Development and Application of the Multi-well Productivity Index (MPI): SPE Journal, vol 5 (1) 21-31, 2000. [pdf]

18. Valkó, P. and M. J. Economides: Fluid Leakoff Delineation in High-Permeability Fracturing, SPE Production and Facilities, 14 (2) 117-130, 1999.

19. Xue, G., Datta-Gupta, A., Valkó, P. and Blasingame, T.A.: Optimal Transformations for Multiple Regression: Application to Permeability Estimation from Well Logs, SPE Formation Evaluation, (June) p85-93, 1997.

20. Valkó, P. and Economides, M.J.: Foam-Proppant Transport, SPE Production Facilities, (Nov) p 44-249, 1997.

21. Valkó, P. and Economides, M.J.: Transient Behavior of Finite Conductivity Horizontal Fractures, SPE Journal, Vol. 2, (June) 1997.

22. Valkó, P. and Economides, M.J.: Performance of a Longitudinally Fractured Horizontal Well SPE Journal, Vol. 1, (March) pp.11-19, 1996. [pdf]

23. Enzendorfer, C., Harris, R.A., Valkó, P., Economides, M.J., Fokker, P.A. and Davies, D.D.: Pipe viscometry of foams, Journal of Rheology, Vol. 39 (2) pp. 345-358, 1995. [pdf]

24. Farkas, E. and Valkó, P.: A Direct IMPES-type Volume Balance Technique for Adaptive Steam Models, SPE Advanced Technology Series, Vol. 2, No. 2, pp. 88-94, (April).

25. Valkó, P. and Economides, M.J.: Propagation of Hydraulically Induced Fractures - a Continuum Damage Mechanics Approach, International Journal of Rock Mechanics, Mineral Science Geomechanics, Vol. 31, (3) pp. 221-229, 1994.

26. Economides, M.J. and Valkó, P.: Interpretation and Modeling of hydraulic fracturing phenomena with continuum damage mechanics - An application to engineering design, in: Computer Methods and Advances in Geomechanics (Siriwardane, H.J. and Zaman, M.M., ed.), Vol. II, pp. 1579-1584, A.A. Balkema, Rotterdam, 1994.

27. Prohaska, M., Frick, T.P., Valkó, P., Mayerhofer, M. and Economides, M.J.: Forschung am Institute für Tiefbohrtechnik und Erdölgewinnung und der MUL, Erdöl Erdgas Kohle, Vol. 110 (4) pp. 146-149, 1994.

28. Winkler W., Valkó, P. and Economides, M.J.: Ein neues rheologisches Modell zur Beschreibung von Polymer-Schaumen, Erdöl Erdgas Kohle, Vol. 110 (4) pp. 158-162, 1994.

29. Winkler W., Valkó, P. and Economides, M.J.: Laminar and Drag Reduced Polymeric Foam Flow, Journal of Rheology, Vol. 38 (1) pp. 111-127, 1994.

30. Valkó, P. and Economides, M.J.: A Continuum Damage Mechanics Model of Hydraulic Fracturing, Journal of Petroleum Technology, pp. 198-205 (March 1993).

31. Valkó, P. and Economides, M.J.: Volume Equalized Equations for Foamed Polymer Solutions, Journal of Rheology, 36, pp. 1033-1055, 1992. [pdf]

32. Bánvölgyi, G., Valkó, P., Vajda, S. and Fulop, N.: Estimation of influential parameters in a steady-state evaporator model: The principal component approach , Computers and Chemical Engineering, 12 (2/3) pp. 117-122, 1988.

33. Bertalan, G., Nagy, T.T., Valkó, P., Horváth, G., Boros-Ivicz, A. and Anna, P.: Mechanism and kinetics of hydrochloric acid initiated e-caprolactam polymerization 2. Polymer Bulletin, 19, pp. 547-554, 1988.

34. Vajda, S., Godfrey, K.R. and Valkó, P.: Numerical Deconvolution via Identification, Journal of Pharmacokinetics and Biopharmaceutics, 16 (1) pp. 85-107, 1987.

35. Vajda, S., Valkó, P. and Godfrey, K.R.: Direct and Indirect Least Squares Methods in Continuous-Time Parameter Estimation, Automatica, the Journal of IFAC, 23 (6) pp. 707-718, 1987. [pdf]

36. Valkó, P. and Vajda, S.: An Extended Marquardt-type Procedure for Fitting Error-in-variables Models. Computers and Chemical Engineering, 11 (1) pp. 37-43, 1987. [pdf]

37. Vajda, S., Valkó, P. and Yermakova, A.: A direct-indirect procedure for estimating kinetic parameters, Computers and Chemical Engineering, 10, pp. 49-54, 1986. [pdf]

38. Vajda, S., Valkó, P. and Turányi, T.: Principal component analysis of kinetic models, International Journal of Chemical Kinetics, 17, pp. 55-81, 1985.

39. Yermakova, A., Bibin, V.N., Brin, E.F., Valkó, P. and Vajda, S.: Comparison of the Direct Integral Method to one of the Gradient Methods of Solving Nonlinear Parameter Estimation Problems. Kinetika i Kataliz, 27, pp. 711-718, 1985. (in Russian)

40. Valkó, P. and Vajda, S.: An extended ODE Solver for Sensitivity Calculations, Computers and Chemistry, 8, pp. 255-271, 1984. [pdf]

41. Valkó, P., Kósza, G., Morgenstern, T. and Richter, F.: Doping Process Control in Silicon Epytaxy I-II, Crystal Research and Technology, 18, pp. 1533-1540, 1983.

42. Kósza, G., Valkó, P., Morgenstern, T. and Richter, F.: Doping Process Control in Silicon Epytaxy I-II, Crystal Research and Technology, 18, pp. 1541-1545, 1983.

43. Valkó, P. and Almásy, G.A.: Periodic Optimization of Hammerstein Type Systems, Automatica, 18, pp. 245-248, 1982. [pdf]

44. Yermakova, A., Vajda, S. and Valkó, P.: Direct Integral Method via Spline-Approximation for Estimating Rate Constants, Applied Catalysis, 2, pp. 139-154, 1982.

45. Valkó, P. and Matros, Y.S.: Optimal Control of a Fixed Bed Adiabatic Reactor Working in Forced Oscillatory Regime, Theoreticheskije Osnovi Himicheskoj Technologii, 16, pp. 33-43, 1982 (in Russian)

46. Oruzheinikov, A.I., Valkó, P., Chumachenko, V.A. and Matros, Y.S.: Selectivity of Catalytic Processes Under Forced Cyclic Operation, Reaction Kinetics and Catalysis Letters, 10, pp. 341-345, 1979.

47. Valkó, P. and Matros, Yu. Sh.: Effectivity of Heterogeneous Catalytic Processes Under Cyclic Control of Feed Temperature, Dokladi Akademii Nauk USSR, 248, pp. 912-915, 1979. (in Russian)

48. Valkó, P.: Existence of Control for a Stirred Tank, A Counte rexample. Chemical Engineering Science, 30, pp. 440-442, 1975. [pdf]

Books (Full)

1. Economides, M.J., Oligney, R. and Valkó, P.: Unified Fracture Design. ORSA Press, Alvin, TX, 2002

2. Valkó, P. and Economides, M.J.: Hydraulic Fracture Mechanics. Wiley, Chichester, 1995

3. Valkó, P. and Vajda, S.: Advanced Scientific Computing in BASIC with Applications in Chemistry, Biology and Pharmacology. Elsevier, Amsterdam, 1989. (Also available in Hungarian, Müszaki Könyvkiadó, Budapest, 1987)

Books (Chapters in)

1. Valkó, P., Daneshy A., Norman, L., Oligney, R. Economides, M, S. Vitthal:: Chapters 17 and 19 in "Well Stimulation", in Petroleum Well Construction. M.J. Economides, S. Dunn-Norman and L. Watters (eds.), Wiley, Chichester, 1998.

2. Vajda, S. and Valkó, P.: "Modeling and Regression", Studies in Computer-Aided Modeling, Design and Operation, Part B, Systems I. Pallai and G.E. Veress, (eds.), Elsevier, Amsterdam, 1992.

Conference Proceedings

1. Valkó P.P. and Amini, S: The Method of Distributed Volumetric Sources for Calculating the Transient and Pseudosteady-State Productivity of Complex Well-Fracture Configurations, SPE paper 106279, presented at the Hydraulic Fracturing Technology Conference, 29-31 January, 2007, College Station, Texas USA

2. Cinar, M., Ilk, D., Onur, M., Valkó, P.P and Blasingame T.A.: A Comparative Study of Recent Robust Deconvolution Algorithms for Well-Test and Production-Data Analysis, SPE 102575, presented on the SPE Annual Technical Conference and Exhibition, 24-27 September, 2006, San Antonio, Texas, USA

3. Ilk, D., Anderson, D. M., Valkó, P. P.: Analysis of Gas Well Reservoir Performance Data Using B-Spline Deconvolution, SPE 100573 presentation at the 2006 SPE Gas Technology Symposium held in Calgary, Alberta, Canada, 15–17 May 2006.

4. Spivey, J. P., Valkó, P. P. and William. D. McCain, Jr.:, Applications of the Coefficient of Isothermal Compressibility to Various Reservoir Situations With New Correlations for Each Situation, SPE 95571 presented at the SPE ATCE, 9-12 Oct 2005, Dallas, TX, USA

5. Ilk, D., P.P. Valkó and T.A. Blasingame, "Deconvolution of variable rate reservoir performance data using B-splines," SPE 95571 presented at the SPE ATCE, 9-12 Oct 2005, Dallas, TX, USA

6. Ibragimov, A. ; D. Khalmanova, P.P. Valkó and J. Walton, "Analytical Method of Evaluating Productivity Index for Constant Production Rate or Constant Wellbore Pressure," SPE 89935 presented at the SPE ATCE, 28 - 30 Sept 2004, Houston, TX, USA

7. Lopez-Hernandez,Henry D.; Peter. P. Valkó, Tai T. Pham, "Optimum FractureTreatment Design Minimizes the Impact of Non-Darcy Flow Effects," SPE 90195 presented at the SPE ATCE, 28 - 30 Sept 2004, Houston, TX, USA

8. X. Ji, P.P. Valkó, J.E. Russell: “Predicting Critical Drawdown for the Onset of Sand Production” SPE paper 86555 to be presented at the International Symposium and Exhibition on Formation Damage Control, 18 - 20 Feb 2004, Lafayette, Louisiana USA

9. Javier M. Canon , Diego J. Romero, Tai T. Pham, P. P. Valkó and Fnu Mursal: Avoiding Proppant Flowback in Tight-Gas Completions with Improved Fracture Design” SPE paper 84310 presented at the SPE Annual Technical Conference and Exhibition held in Denver, Colorado, U.S.A., 5-8 October 2003.

10. P. P. Valkó and Fnu Mursal: “New Approach for Interpreting Pressure Transient Test After Massive Acidizing Treatment” Paper SPE 77623 presented at the SPE Annual Technical Conference and Exhibition held in San Antonio, Texas, 29 September–2 October 2002.

11. Diego J. Romero, SPE, Texas A&M University (currently with El Paso Production), P. P. Valkó, SPE, Texas A&M University, Michael J. Economides, SPE, University of Houston: The optimization of the productivity index and the fracture geometry of a stimulated well with fracture face and choke skins, Prepared for presentation at the SPE International Symposium and Exhibition on Formation Damage Control held in Lafayette, Louisiana, 20–21 February 2002.

12. Valkó P. P. and Vajda, S.: Towards a Standardized Test Set of Numerical Inversion of Laplace Transforms for a Frequently Occurring Class of Problems in Science and Engineering, Inverse Problems in Engineering Symposium, June 14-16, 2001, Texas A&M University

13. E. Escobar, SPE, PDVSA INTEVEP, P. Valkó, SPE, Texas A&M, W.J. Lee, SPE, Texas A&M, M.G. Rodríguez, SPE, PDVSA E&P. SPE/Petroleum Society of CIM 65525: “Optimization Methodology for Cyclic Steam Injection With Horizontal Wells”, (This paper was prepared for presentation at the 2000 SPE/Petroleum Society of CIM International Conference on Horizontal Well Technology held in Calgary, Alberta, Canada, 6-8 November 2000.)

14. X. Wang, SPE, BP Amoco, S. Indriati, University of Houston, P.P. Valkó, SPE, Texas A&M University, and M.J. Economides, SPE, University of Houston. SPE 64749: “Production Impairment and Purpose-Built Design of Hydraulic Fractures in Gas-Condensate Reservoirs”, (This paper was prepared for presentation at the SPE nternational Oil and Gas Conference and Exhibition in China held in Beijing, China, 7–10 November 2000.)

15. Fan, Y.; Markitell, B.N.;Marple, B.D.; Valkó, P.P.; Evaluation of frac-and-pack completions in the Eugene Island, Proceedings - SPE Annual Technical Conference and Exhibition, DELTA, 2000, Proceedings 20000 SPE Annual Technical Conference and Exhibition - Drilling and Completion, Oct 1-Oct 4 2000, Dallas, TX, USA, p 359-372 Publisher: Soc Pet Eng (SPE), Richardson, TX, USA

16. McCain, W.D. Jr.;Soto, R.B.;Valkó, P.P.;Blasingame, T.A.; Correlation of bubblepoint pressures for reservoir oils - a comparative study, Proceedings - SPE Annual Western Regional Meeting, 1998, Proceedings of the 1998 SPE Eastern Regional Meeting, Nov 9-11 1998, Pittsburgh, PA, USA, SPE 51086, p 267-275 Publisher: Soc Pet Eng (SPE), Richardson, TX, USA

17. Ispas, I.N., Britt, L.K., Tiab, D., Valkó, P. and Economides, M.J.: "Methodology of Fluid Leakoff Analysis in High-Permeability Fracturing" SPE paper 39476, SPE Intl Symp on Formation damage, Lafayette, LA, February 18-19, 1998.

18. Valkó, P. and Economides, M.J.: "Fluid Leakoff Delineation in High-Permeability Fracturing" SPE paper 37403, SPE Production Operations Symposium, Oklahoma City, OK, February 11-13, 1997.

19. Villegas, M.E., Wattenbarger, R.A., Valkó, P., and Economides, M.J.: "Performance of Longitudinally Fractured Horizontal Wells in High-Permeability Anisotropic Formations" SPE paper 36453, SPE Annual Technical Conference and Exhibition, Denver, CO, October 6-9, 1996.

20. Valkó, P., Oligney, R.E., Schraufnagel, R.A.: "Slopes Analysis of Frac Pack Bottomhole Pressures" SPE paper 31105, SPE International Symposium on Formation Damage Control, Lafayette, LA, February 14-15, 1996.

21. Valkó, P. and Economides, M.J.: "Performance of Fractured Horizontal Wells in High-Permeability Reservoirs" SPE paper 31149, Formation Damage and Control Symposium, Lafayette, LA, February 14-15, 1996.

22. Xue, G., Datta-Gupta, A., Valkó, P. and Blasingame, T.A.: "Optimal Transformations for Multiple Regression: Application to Permeability Estimation from Well Logs", SPE paper 35412 presented at the Improved Oil Recovery Symposium, Tulsa, OK, April 21, 1996.

23. Valkó, P. and Pertik, B.: P3D modeling of vertical fracture growth. Proceedings of the 2nd European Conference on the Mathematics of Oil Recovery: Guerrilot, D., Guillon, O. (editors), Arles, 1990, September 11-14, Editions Technip, Paris, 1990.

Other Publications, Magazines etc.

Valkó, P. and Pertik, B.: P3D modeling of vertical fracture growth. Proceedings of the 2nd European Conference on the Mathematics of Oil Recovery: Guerrilot, D., Guillon, O. (editors), Arles, 1990, September 11-14, Editions Technip, Paris, 1990.
Canon, Javier M., Valkó, P.P. and Tai T. Pham: Improved fracture design avoids proppant flowback in tight gas completions, World Oil, July, 2004, pp 67-71.
Economides, M.J., R.E. Oligney and P. Valkó: Applying unified fracture design to natural gas wells, World Oil, October, 2002, pp 50-62.
Ibragimov, A. and P. Valkó: On Productivity Index in Pseudo-steady and Boundary-dominated flow regimes, ISC-00-05-MATH, Technical Report Series, Institute for Scientific Computation, The Texas A&M University System, 2000.
Valkó, P. , R.E. Oligney and Economides, M.J.: High Permeability Fracturing of Gas Wells Gas Tips (GRI), pp 31-40, (“Fall”) 1997.
Fraser, L., Stanger, B., Griffin, T., Jabri, M., Sones, G., Steelman, M., and Valkó, P.: Seamless Fluids Programs: A Key to Better Well Construction, Oilfield Review, Vol. 8 No(2) pp.42-56, 1996.
Peter Valkó and D. Larry Murphy: PE305 Petroleum Engineering: Fracturing, IHRDC Video Library for Exploration and Production Specialists