RESEARCH INTERESTS

Dr. Ehlig-Economides is internationally recognized for expertise in reservoir engineering, pressure transient analysis, integrated reservoir characterization, complex well design, and production enhancement. She is currently working to introduce degree programs and research in Energy Engineering at Texas A&M University. She has recently become director of the Center for Energy, Environment, and Transportation Innovation (CEETI) in the Crisman Institute. The center website is www.ceeti.org.

EDUCATION

• Ph.D., Petroleum Engineering, Stanford University, 1979
• M.S., Chemical Engineering, University of Kansas, 1976
• M.A.T., Mathematics Education, University of Kansas, 1974
• B.A., Math-Science, Rice University, 1971

HONORS AND AWARDS

• Phi Kappa Phi ( University of Kansas)
• Standard Oil of California Fellowship ( Stanford University)
• Sigma Xi (National Honor Research Society)
• Outstanding Faculty Award ( University of Alaska, Fairbanks; School of Mineral Industry)
• SPE Distinguished Achievement Award for Petroleum Engineering Faculty, 1982
• Alaska SPE Engineer of the Year, 1982
• SPE Formation Evaluation Award, 1995
• SPE Distinguished Member in 1996
• Lester C. Uren Award in 1997
• SPE Distinguished Lecturer, 1997-98
• National Academy of Engineering, 2003

PROFESSIONAL SOCIETIES AND ACTIVITIES

• Member of Society of Petroleum Engineers of AIME
• Workshop Presenter for Expanding Your Horizons, 2001 and 2002
• Member of SPE Ferguson Award Committee, 1999-2001
• Member of SPE Forum Coordination Committee, 1999-2000
• Member of SPE Forum Series Coordinating Committee, 1999
• Forum liaison for South American Forum, 1999, 2000
• SPE Distinguished Lecturer, 1997-98
• Chairperson of SPE Cultural Diversity Committee, 1994-95
• Member of SPE Ad Hoc Task Force on Diversity/Governance, 1995
• Executive Editor for SPE Formation Evaluation, 1995-96
• Cochairperson of Steering Committee for SPE Rocky Mountain Forum on Horizontal Well Evaluation and Performance Assessment, 1995
• Member of Steering Committee for SPE European Forum on Evaluation, Development and Management of Layered Reservoirs, 1995
• Member of Steering Committee for Colloquium for Petroleum Engineering Education, 1995
• Member of Steering Committee for SPE European Forum on Well Testing, 1992
• SPE Editorial Review Committee Chairman, 1991-93
• SPE Technical Editor, 1982-86
• Member of Technical Program Committee for 1983 SPE Western Region Conference
• Member of Technical Program Committee for 1987 SPE Low Permeability Symposium
• Member Visiting Committee for the University of Texas Petroleum Engineering Department
• President Spring Branch Memorial Business and Professional Women’s Club, 1994-95

PUBLICATIONS

Textbook: Economides, M.J., Hill, A. Daniel, and Ehlig-Economides, C.A.: Petroleum Production Systems, PTR Prentice Hall, Englewood Cliffs, NJ, 1994.

Reservoir Engineering and Horizontal and Multibranch Wells

1. Ehlig-Economides, C.A., and Spath, J.: “Waterflood Infill Well Pattern Strategies for Horizontal and Multibranch Wells,” SPE 35209 presented at the Permian Basin Oil Recovery Conference held in Midland, TX, 27-29 March, 1996.
2. Ehlig-Economides, C.A., Mowat, G.R., and Corbett, C.: “Techniques for Multibranch Well Trajectory Design in the context of a Three-Dimensional Reservoir Model,” SPE 35505 presented at the European 3-D Reservoir Modelling Conference in Stavanger, Norway, 16-17 April 1996.
3. Ehlig-Economides, C.A., Chan, K.S., and Spath, J.: “Production Enhancement Strategies in Strong Bottom Water Drive Reservoirs,” SPE 36613 presented at the 1996 SPE Annual Conference and Exhibition, Denver, Colorado, Oct. 6-9.
4. Fernandez, Belkis, Ehlig-Economides, C.A., and Economides, M. J.: “Multibranch Injector/Producer Wells in Thick Heavy Crude Reservoirs,” SPE 53950, presented at the 1999 SPE Latin American and Caribbean Petroleum Engineering Conference held in Caracas, Venezuela, April 1999.
5. Ehlig-Economides, C.A., Fernandez, B.G., Gongora, C.A.: “Global Experiences and Practice for Cold Production of Moderate and Heavy Oil,” SPE 58773, presented at the SPE international Symposium on Formation Damage Control, Lafayette, LA, February 2000.
6. Ehlig-Economides, C.A., Taha, M., Marin, H.D., Novoa, E. and Sanchez, O.: “Drilling and completion Strategies in Naturally Fractured Reservoirs,” SPE 59057 presented at the SPE International Petroleum Conference and Exhibition in Mexico, Villahermosa, Feb. 2000.
7. Ehlig-Economides, C.A., and Economides, M.J.: “Single Well Reservoir Management – the Ultimate Multibranch Well Challenge,” SPE 59447 alternate paper for the SPE Asia Pacific Conference on Integrated Modeling for Asset Management, Yokohama, April 2000.
8. Ehlig-Economides, C.A., Fernandez, B., and Economides, M.J.: “Multibranch Injector/Producer Wells in Thick Heavy Crude Reservoirs,” SPEREE, June 2001
9. Ehlig-Economides, C. A., and Economides, M. J.: “Accelerating Oil Recovery with p-Mode Production,” World Oil, November 2000.
10. Guerithault, Raphael, and Ehlig-Economides, C.A.: “Single-Well Waterflood Strategy for Accelerating Oil Recovery,” SPE 71608 presented at the Annual Technical Conference and Exhibition, October, 2001
11. Terez, Ivan E., and Ehlig-Economides, C.A.: “Horizontal Wells in Thermal Applications for Displacement and Gravity Drainage,” SPE/CIM 78974, presented at the International Thermal Operations and Heavy Oil Symposium and International Horizontal Well Technology Conference held in Calgary, Alberta, Canada, November 2002.

Layered Reservoir Testing 

1. Ehlig-Economides, C.A., and Ayoub, J.A.: "Vertical Interference Testing Across a Low Permeability Zone, SPEJ, Oct., 1986.
2. Ehlig-Economides, C.A., and Joseph, J.A.: "A New Test for Determination of Individual Layer Properties in a Multilayered Reservoir," SPEFE, Sept., 1987.
3. Ehlig-Economides, C.A.: "Well Testing in Layered Reservoirs, "Trans., International Seminar on North Sea Oil and Gas Reservoirs, Trondheim, Norway, Dec., 1986.
4. Ehlig-Economides, C.A., Joseph, J.A., Erba, M., and Vik, S.A.: "Evaluation of Single-Layer Transients in Multilayered System, SPE Paper No. 15860, Oct., 1986.
5. Ehlig-Economides, C.A.: "Testing and Interpretation in Layered Reservoirs," JPT, Sep., 1987.
6. Ayestaran, L., Ehlig-Economides, C.A., Shah, P.C., Kuchuk, F.J., Nicolson, B., and Wittmann, M.: "Layered Reservoir Testing," The Technical Review, V. 35, no. 4 (October 1987) 4-11.
7. Ehlig-Economides, C.A.: "Model Diagnosis for Layered Reservoirs," SPEFE, Sept. 1993.

Pressure Transient Testing

1. Ehlig-Economides, C.A., and Ramey, H.J., Jr.: "Transient Rate Decline Analysis for Wells Produced at Constant Pressure," SPEJ, Feb., 1981.
2. Ehlig-Economides, C.A., and Ramey, H.J., Jr.: "Pressure Buildup for Wells Produced at a Constant Pressure," SPEJ, Feb., 1981.
3. Ehlig-Economides, C.A., and Ansari, J.A.: "Interference Effects Among Wells Produced at Constant Pressure," SPE Paper No. 11715, March, 1983.
4. Ehlig-Economides, C.A., and Economides, M.J.: "Pressure Transient Analysis in an Elongated Linear Flow System," SPEJ, Dec., 1985.
5. Wagner, P.B., Economides, M.J., and Ehlig-Economides, C.A.: "Custom Type-Curve Generation for Pressure Transient Analysis of Elongated Linear Flow Systems," Rev., Inst. Fr. du Pet., 39, No. 6, Nov.-Dec., 1984.
6. Joseph, J.A., Ehlig-Economides, C.A., and Kuchuk, F.J.: "The Role of Downhole Flowrate and Pressure Measurements in Reservoir Testing," SPE Paper No. 18379, Oct., 1988.
7. Ehlig-Economides, C.A.: "Use of the Pressure Derivative for Diagnosing Pressure-Transient Behavior," JPT, Oct., 1988.  
8. Ehlig-Economides, C.A., Joseph, J.A., Ambrose, R.W., and Norwood, C: "A Modern Approach to Reservoir Test Interpretation," JPT, Dec., 1990.
9. Ehlig-Economides, C.A., Ambrose, R.W., and Joseph, J.A.: "Pressure Desuperposition Technique for Improved Late-Time Transient Diagnosis," SPE Paper No. 20550, Sept., 1990.
10. Veneruso, A., Ehlig-Economides, C.A., and Petitjean, L.: "Pressure Gauge Specification Considerations in Practical Well Testing," Paper No. SPE 22752, presented at the 1991 SPE Annual Conference and Exhibition, Dallas, Texas, Oct. 6-9.
11. Ehlig-Economides, C.A.: "Integrating Transient Well Test Data with Field Wide Simulation of Fluid Flow in Heterogeneous Reservoirs," Paper No. SPE 22371, presented at the SPE International Meeting on Petroleum Engineering, Beijing, China, March 24-27, 1992.
12. Deruyck, B., Ehlig-Economides, C.A., and Joseph, J.A.: "Testing Design and Analysis," The Oilfield Review, V. 4, no. 2 (April 1992) 28-45.
13. Veneruso, A.F., Ehlig-Economides, C.A., and Akmansoy, A.-M.: "Computer Based Downhole Data Acquisition and Transmission in Well Testing," presented at the SPE Annual Technical Conference and Exhibition, Washington, D.C., 1992.
14. Brown, P.A. and Ehlig-Economides, C.A.: "Use of Downhole Flowmetering Technique for Improved Drillstem Test Interpretation," presented at the SPE Annual Technical Conference and Exhibition, Washington, D.C., 1992.
15. Ehlig-Economides, C.A.: "Computation of Test Area of Investigation in Nonradial Geometries," H.J. Ramey, Jr., Memorial Volume, SPE Advanced Technology Series, 1995.
16. Ehlig-Economides, C.A., Hegeman, Peter, and Vik, Sven: “Guidelines Simplify Well Test Interpretation,” OGJ, July 18, 1994.
17. Ehlig-Economides, C.A., Hegeman, Peter, and Clark, Gavin: “Three Key Elements Necessary for Successful Testing,” OGJ, July 25, 1994.
18. Ehlig-Economides, C.A., Hegeman, Peter, and Clark, Gavin: “Modern Testing Meets Wide Range of Objectives,” OGJ, Aug. 1, 1994.
19. Mayerhofer, M.J., Ehlig-Economides, C.A., and Economides, M.J.: “Pressure-Transient Analysis of Fracture-Calibration Tests,” JPT, March, 1995.
20. Ehlig-Economides, C.A., Fan, Yong, and Economides, M.J.: “Interpretation of Fracture Calibration Tests in Naturally Fractured Reservoirs,” SPE Paper No. 28690, presented at the SPE International Petroleum Conference & Exhibition of Mexico, Veracruz, Mexico, 1994.
21. Ehlig-Economides, C.A., and Spivey, John: “Intuition and Well Test Interpretation,” Harts E&P, October 2000.

Reservoir Engineering

1. Ehlig-Economides, C.A., and Economides, M.J.: "Pressure and Temperature Dependent Properties of the Rock-Fluid Systems in Petroleum and Geothermal Formations," SPE Paper No. 9919, March, 1981.
2. Ostermann, R.D., Ehlig-Economides, C.A., and Owolabi, O.O.: "Correlations of the reservoir Fluid Properties of Alaska Crudes," SPE Paper No. 11703, March, 1983.
3. Ehlig-Economides, C.A., Ebbs, Don and Meehan, D. Nathan: "Factoring Anisotropy into Well Design," The Oilfield Review, V. 2, no. 4 (October 1990) 24-33.
4. Ehlig-Economides, C.A.: “Applications for Multiphase Compartmentalized Material Balance,” Paper No. SPE 27999, presented at the University of Tulsa Centennial Petroleum Engineering Symposium held in Tulsa, Oklahoma, August 1994.
5. Ehlig-Economides, C.A.: “Engineering Applications for Integrated Reservoir Characterization,” Paper No. SPE 29994, prepared for presentation at the SPE International Meeting on Petroleum Engineering, Beijing, China, Nov., 1995.
6. Mathur, A.K., Ning, X., Ehlig-Economides, C.A., Economides, M.J.: “Hydraulic Fracture Stimulation of Highly Permeable Formations: The Effect of Critical Fracture Parameters on Oilwell Production and Pressure,” Paper No. SPE 30652, presented at the SPE Annual Technical Conference & Exhibition held in Dallas, TX, October, 1995.
7. Ehlig-Economides, C.A., and Economides, M.J.: “Recipe for Success in Ultradeep Water,” Paper No. SPE 77625, presented at the SPE Annual Technical Conference & Exhibition held in San Antonio, TX, October, 2002.
8. Briceño, M.C., Peralta, J.A., Silva, R.J., Rismyhr, O., Zerpa, L.B., and Ehlig-Economides, C. A.: “Horizontal and Deviated Wells Water Disposal Injection Experiences in a Venezuelan Heavy Oil Reservoir in the Orinoco Belt and Future Injection Practices,” SPE Paper No. 84377, prepared for SPE Annual Technical Conference & Exhibition held in Denver, CO, October, 2003.

Geothermal Reservoir Engineering

1. Daneshi, A., Ehlig-Economides, and Ramey, H.J., Jr.: "The Effect of Temperature Level on Absolute Permeability of Unconsolidated Silica and Stainless Steel," Geoth. Res. Council Trans., 2, 1978.
2. Ehlig-Economides, C.A., Economides, M.J., and Miller, F.G.: "Interference Between Wells in a Fractured Formation," Geoth. Res. Council Trans., 4, 1980.
3. Ehlig-Economides, C.A., and Economides, M.J: "Analysis of a Geothermal Well Test in a Predominantly Linear Flow System," Proc., Int. Conf. on Geoth. Energy, May, 1982.
4. Economides, M.J., Ehlig-Economides, C.A., Dunze, J.F., and Lofgren, B.: "A Fieldwide Reservoir Engineering Analysis of the Pilgrim Springs, Alaska, Geothermal Reservoir," Proc., Eighth Stanford Workshop on Geoth. Res. Eng., Dec., 1982.

Natural Gas Hydrates

1. Ehlig-Economides, C.A., and Combellick, P.: "Natural Gas Hydrates - A Frozen Treasure," The Northern Engineer, 13, No. 1, Spring, 1981.
2. Collett, T.S., and Ehlig-Economides, C.A.: "Detection and Evaluation of the In-Situ Natural Gas Hydrates in the North Slope Region, Alaska," SPE Paper No. 11673, March, 1983.
3. Godbole, S.P., Kamath, V.A., and Ehlig-Economides, C.A.: "In-Situ Natural Gas Hydrates in Alaska," SPERE, Feb., 1988.

Groundwater Modeling

1. Ehlig, C.A.: "Comparison of Numerical Method for Solution of the Diffusion-convection Equation in One and Two Dimensions," Finite Elements in Water Resources,  W.G. Gray, G.F. Pinder, and C.A. Brebbia, editors, Pentech Press, London, p. 1.91-1.102.
2. Ehlig, C.A., and Halepaska, J.C.: "A Numerical Study of Confined-Unconfined Aquifers Including Effects of Delayed Yield and Leakage," Water Resources Research, 12, Dec., 1976.

Patents

1. Ehlig-Economides, C.A.: "Property Determination for Multilayer Formation," US Patent # 4,803,873, 1989.
2. Ehlig-Economides , C.A. : "Characterizing the Layers of a Hydrocarbon Reservoir," US Patent # 5,247,829, Sept. 5, 1993.

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