Dr. Erdal Ozkan PhD Petroleum Engineering

PUBLICATIONS AND PRESENTATIONS

Thesis and Dissertation:

Ozkan, E.: Chemical Flooding, M.Sc Thesis, Istanbul Technical University, Istanbul, Turkey (1982).

Ozkan, E.: Performance of Horizontal Wells, Ph.D. dissertation, the University of Tulsa, Tulsa, Oklahoma (1988).

Book:

Raghavan, R. and Ozkan, E.: A Method for Computing Unsteady Flows in Porous Media, Pitman Research Notes in Mathematics Series, Longman Scientific & Technical, Essex (1994).

Book Contributions:

Petroleum Engineering Handbook, Vol. 1, General Engineering, Chapter 3, Mathematics of Transient Analysis, Society of Petroleum Engineers, Richardson, Texas (2006).

Transient Well Testing, SPE Monograph 23, Chapter 13, Slanted Wells, Society of Petroleum Engineers, Richardson, Texas (2009).

Transient Well Testing, SPE Monograph 23, Chapter 14, Horizontal Wells, Society of Petroleum Engineers, Richardson, Texas (2009).

Refereed Journal Publications:

Ozkan, E., Ohaeri, U., and Raghavan, R.: "Unsteady Flow to a Well Produced at a Constant Pressure in a Fractured Reservoir," SPE Formation Evaluation, June 1987, 186-200.

Ozkan, E., Raghavan, R., and Joshi, S.D.: "Horizontal Well Pressure Analysis," SPE Formation Evaluation, Dec. 1989, 567-575.

Ozkan, E., Raghavan, R.: "Performance of Horizontal Wells Subject to Bottomwater Drive," SPE Reservoir Engineering, Aug. 1990, 375-382.

Ozkan, E. and Raghavan, R.: "New Solutions for Well-Test-Analysis Problems: Part 1 - Analytical Considerations," SPE Formation Evaluation, Sept. 1991, 359-368.

Ozkan, E. and Raghavan, R.: "New Solutions for Well-Test-Analysis Problems: Part 2 - Computational Considerations and Applications," SPE Formation Evaluation, Sept. 1991, 369-378.

Spath, J.B., Ozkan, E., and Raghavan, R.: "An Efficient Algorithm for Computation of Well Responses in Commingled Reservoirs," SPE Formation Evaluation, June, 1994, 115-121.

Ozkan, E., Sarica, C., Haciislamoglu, M., and Raghavan, R.: "Effect of Conductivity on Horizontal Well Pressure Behavior," SPE Advanced Technology Series, Vol. 3, No: 1, March 1995, 85-94.

Ozkan, E., and Raghavan, R.: "Some Strategies to Apply the Stehfest Algorithm for a Tabulated Set of Numbers," SPE Journal (Sept. 1997) 363.

Ozkan, E., Yildiz, T., and Kuchuk, F. J.: "Transient Pressure Behavior of Duallateral Wells," SPE Journal (June 1998) 181.

Yildiz, T. and Ozkan, E.: "Pressure-Transient Analysis for Perforated Wells," SPE Journal (June 1999) 167.

Ozkan, E., Sarica, C., and Haciislamoglu, M.: "Influence of Pressure Drop Along the Wellbore on Horizontal Well Productivity," SPE Journal (September 1999) 180.

Umnuayponwiwat, S. and Ozkan, E.: "Evaluation of Inflow Performance of Multiple Horizontal Wells in Closed Systems," Journal of Energy Resources Technology (March 2000) 8.

Yalniz, U. and Ozkan, E.: "A Generalized Friction-Factor Correlation To Compute Pressure Drop in Horizontal Wells," SPE Production and Facilities (Nov. 2001) 232.

Ozkan, E.: "Analysis of Horizontal-Well Responses: Contemporary vs. Conventional," SPE Reservoir Evaluation and Engineering (Aug. 2001) 260.

Ozkan, E., Sarica, C., and Haci, M.: "Interpretation of Horizontal-Well Production Logs: Influence of Logging Tool," SPE Production and Facilities (May. 2002) 260.

Ozkan, E. and Raghavan, R.: "A Computationally Efficient, Transient-Pressure Solution for Inclined Wells," SPE Reservoir Evaluation and Engineering (Oct. 2000) 1.

Gil, J. Ozkan, E., and Raghavan, R.: "Fractured-Well-Test Design and Analysis in the Presence of Non-Darcy Flow," SPE Reservoir Evaluation and Engineering (June. 2003).

Al-Khamis, M., Ozkan, E., and Raghavan, R.: "Analysis of Interference Tests With Horizontal Wells," SPE Reservoir Evaluation & Engineering, (Aug., 2005) 337.

Tang, Y., Yildiz, T., Ozkan, E., and Kelkar, M.: "Effects of Formation Damage and High- Velocity Flow on the Productivity of Perforated Horizontal Wells," SPE Reservoir Evaluation & Engineering, (Aug. 2005) 315-324.

Al-Kobaisi, M., Ozkan, E., and , H.: "A Hybrid Numerical-Analytical Model of Finite-Conductivity Vertical Fractures Intercepted by a Horizontal Well," SPE Reservoir Evaluation & Engineering (Aug. 2006) 345

Tavares, C., Kazemi, H., and Ozkan, E.: "Combined Effect of Non-Darcy Flow and Formation Damage on Gas Well Performance of Dual-Porosity and Dual-Permeability Reservoirs," SPE Reservoir Evaluation & Engineering (Oct. 2006) 543

Al-Mohannadi, N., Ozkan, E., and Kazemi, H.: "Grid System Requirements in Numerical Modeling of Pressure-Transient Tests in Horizontal Wells," SPE Reservoir Evaluation & Engineering (Feb. 2007)

Al-Mohannadi, N., Ozkan, E., and Kazemi, H.: "Pressure-Transient Responses of Horizontal and Curved Wells in Anticlines and Domes," SPE Reservoir Evaluation & Engineering (April. 2007).

Al-Ajmi N. M., Kazemi, H. and Ozkan, E.: "Estimation of Storativity Ratio in a Layered Reservoir with Crossflow," SPE Reservoir Evaluation & Engineering (April 2008) 267-279

Medeiros, F., Ozkan, E., and Kazemi, H.: "Productivity and Drainage Area of Fractured Horizontal Wells in Tight Gas Reservoirs," SPE Reservoir Evaluation & Engineering (Oct. 2008) 902-911

Ramirez, B., Kazemi, H., Al-Kobaisi, M., Ozkan, E., and Atan, S.: "A Critical Review for Proper Use of Water-Oil-Gas Transfer Functions in Dual-Porosity Naturally Fractured Reservoirs - Part I," SPE Reservoir Evaluation & Engineering (April 2009) 200-210.

Balogun, A., Kazemi, H., Ozkan, E., Al-Kobaisi, M., and Ramirez, B.: "Verification and Proper Use of Water-Oil Transfer Function for Dual-Porosity and Dual-Permeability Reservoirs," SPE Reservoir Evaluation & Engineering (April 2009) 189-199.

Al-Kobaisi, M., Kazemi, H., Ramirez, B., Ozkan, E., and Atan, S.: "A Critical Review for Proper Use of Water/Oil/Gas Transfer Functions in Dual-Porosity Naturally Fractured Reservoirs: Part II," SPE Reservoir Evaluation & Engineering (April 2009) 211-217.

Medeiros, F., Ozkan, E., and Kazemi, H.: "A Semi-Analytical Approach to Model Pressure-Transients in Heterogeneous Reservoirs," SPE Reservoir Evaluation & Engineering (April 2010) 341-358.

Medeiros, F., Kurtoglu, B., Ozkan, E., and Kazemi, H.: "Analysis of Production Data From Hydraulically Fractured Horizontal Wells in Shale Reservoirs," SPE Reservoir Evaluation & Engineering (June 2010) 559-568.

Ozkan, E., Brown, M., Raghavan, R., and Kazemi, H.: "Comparison of Fractured Horizontal-Well Performance in Conventional and Unconventional Reservoirs," SPE Reservoir Evaluation & Engineering (April 2011) 248-259.

Raghavan, R., and Ozkan, E.: "Flow in Composite Slabs," SPE Journal (June 2011) 374-387.

Apaydin, O. G., Ozkan, E., and Raghavan, R.: "Effect of Discontinuous Microfractures on Ultratight Matrix Permeability of a Dual-Porosity Medium," SPE Reservoir Evaluation & Engineering (August 2012) 473-485.

Ozkan, S. Kurtoglu, B., and Ozkan, E.: "Long-Term Economic Viability of Production from Unconventional Liquids-Rich Reservoirs: The Case of Bakken Field," SPE Economics and Management (October 2012) 215-222.

Supplements to Journal Publications:

Ozkan, E., Raghavan, R., and Joshi, S.D.: "Supplement to SPE 16378, Horizontal Well Pressure Analysis," SPE 20271, Society of Petroleum Engineers, Book Order Department, Richardson, Texas (1989).

Ozkan, E., Raghavan, R.: "Supplement to SPE 18559, Performance of Horizontal Wells Subject to Bottomwater Drive," SPE 21464, Society of Petroleum Engineers, Book Order Department, Richardson, Texas (1990).

Ozkan, E. and Raghavan, R.: "Supplement to SPE 18615, New Solutions for Well-Test-Analysis Problems: Part 1 - Analytical Considerations," SPE 23593, Society of Petroleum Engineers, Book Order Department, Richardson, Texas (1991).

Spath, J.B., Ozkan, E., and Raghavan, R.: "Supplement to SPE 21550, An Efficient Algorithm for Computation of Well Responses in Commingled Reservoirs," SPE 29156, Society of Petroleum Engineers, Book Order Department, Richardson, Texas (1994).

Ozkan, E., Sarica, C., Haciislamoglu, M., and Raghavan, R.: "Supplement to SPE 24683, Effect of Conductivity on Horizontal Well Pressure Behaviour," SPE 30230, Society of Petroleum Engineers, Book Order Department, Richardson, Texas (1995).

Conference Presentations:

Ozkan, E. and Raghavan, R.: "A Breakthrough Time Correlation for Coning Toward Horizontal Wells," Paper SPE 20964, Presented at Europec 90, The Hague, Oct. 22-24, 1990.

Ozkan, E., Vo, D.T., and Raghavan, R.: "Some Applications of Pressure Derivative Analysis Procedure," Paper SPE 16811, Presented at the 62nd Annual Meeting of SPE, Dallas, TX., Sept. 27-30, 1987.

Ozkan, E., and Menekse, K.: "Productivity of Horizontal Wells," (in Turkish) Paper, Presented at the 8th Turkish Petroleum Congress, Ankara, April 16-20, 1990.

Ozkan, E., and Raghavan, R.: "Performance of Wells in the Presence of Bottom Water," Paper, Presented at the 8th Turkish Petroleum Congress, Ankara, April 16-20, 1990.

Chen, C.C., Ozkan, E., and Raghavan, R.: "A Study of Fractured Wells in Bounded Reservoirs," Paper SPE 22717, Presented at the 66th Annual Meeting of SPE, Dallas, TX., Oct. 6-9, 1991

Sarica, C., Ozkan, E., Haciislamoglu, M., Raghavan, R., and Brill, J.: "Influence of Wellbore Hydraulics on Pressure Behavior and Productivity of Horizontal Gas Wells," Paper SPE 28486, Presented at the 69th Annual Meeting of SPE, New Orleans, LA, Sept. 25-28, 1994.

Ozkan, E., and Raghavan, R.: "New Solutions for Well-Test-Analysis Problems: Part 3 - Additional Algorithms," Paper SPE 28424, Presented at the 69th Annual Meeting of SPE, New Orleans, LA, Sept. 25-28, 1994.

Yildiz, T. and Ozkan, E.: "Transient Pressure Behavior of Selectively Completed Horizontal Wells," Paper SPE 28388, Presented at the 69th Annual Meeting of SPE, New Orleans, LA, Sept. 25-28, 1994.

Serpen, U., Ozkan, E., and Alpkaya, E.: "Coalbed Methane Potential of Zonguldak Basin," (in Turkish) Paper, Presented at the 9th Turkish Petroleum Congress, Ankara, April 15-17, 1996.

Ozkan, E. and Raghavan, R.: "Estimation of Formation Damage in Horizontal Wells," Paper SPE 37511, presented at the 1997 SPE Production Operations Symposium, Oklahoma City, OK, March 10-11, 1997.

Yildiz, T. and Ozkan, E.: "Influence of Areal Anisotropy on Horizontal Well Performance," Paper SPE 38671, Presented at the 72nd Annual Meeting of SPE, San Antonio, TX, Oct. 5-8, 1997.

Serpen, U., Alpkaya, E. N., and Ozkan, E.: "Preliminary Investigation of Coalbed Methane Potential of the Zonguldak Basin in Turkey," paper SPE 39985, presented at the SPE Gas Technology Symposium, Calgary, Alberta, Canada, March 15-18, 1998.

Ozkan, E. and Raghavan, R.: "A Computationally Efficient, Transient-Pressure Solution for Inclined Wells," paper SPE 49085, presented at the SPE Annual Technical Conference and Exhibition, New Orleans, LA, Sept. 27-30, 1998.

Yildiz, T. and Ozkan, E.: "A Simple Correlation to Predict Wellbore Pressure Drop Effects on Horizontal Well Productivity," paper SPE 49938, presented at the SPE Annual Technical Conference and Exhibition, New Orleans, LA, Sept. 27-30, 1998.

Yalniz, U. and Ozkan, E.: "A Generalized Friction Factor Correlation to Compute Pressure Drop in Horizontal Wells," paper SPE 48863, presented at the SPE International Conference and Exhibition in China, Beijing, China, Nov. 2-6, 1998.

Ozkan, E., Sarica, C., and Haci, M.: "Interpretation of Horizontal-Well Production Logs: Influence of Logging Tool," paper SPE 50395 presented at the SPE International Conference of Horizontal Well Technology, Calgary, Alberta, Canada, Nov. 1-4, 1998.

Ozkan, E.: "Analysis of Horizontal-Well Responses: Contemporary vs. Conventional," paper SPE 52199 presented at the SPE Mid-Continent Operations Symposium, Oklahoma City, Oklahoma, March 28-31, 1999.

Ozkan, E., Yildiz, T., and Raghavan, R.: "Pressure-Transient Analysis of Perforated Horizontal Wells," paper SPE 56421 presented at the 1999 SPE Annual Technical Conference and Exhibition, Houston, TX. Oct. 3-6, 1999.

Umnuayponwiwat, S. and Ozkan, E.: "Evaluation of Inflow Performance of Multiple Horizontal Wells in Closed Systems," paper PR-069 presented at the ETCE/OMAE2000 Joint Conference, New Orleans, LA. Feb. 14-17, 2000.

Weipeng, Jiang, Sarica, C., Ozkan, E., and Kelkar, M.: "Investigation of the Effects of Completion Geometry on Single Phase Liquid Flow Behavior in Horizontal Wells," paper PR-061 presented at the ETCE/OMAE2000 Joint Conference, New Orleans, LA. Feb. 14-17, 2000.

Umnuayponwiwat, S. and Ozkan, E.: "Water and Gas Coning Toward Finite-Conductivity Horizontal Wells; Cone Build-up and Breakthrough," paper SPE 60308, 2000 SPE Rocky Mountain Regional/Low Permeability Reservoirs Symposium, Denver, CO. March. 12-15, 2000.

Umnuayponwiwat, S. and Ozkan, E., Pearson, C. M., and Vincent, M.: "Effect of Non-Darcy Flow on the Interpretation of Transient-Pressure Responses of Hydraulically Fractured Wells," paper SPE 63176, presented at the 2000 SPE Annual Technical Meeting and Exhibition, Dallas, TX. Oct. 1-4, 2000.

Umnuayponwiwat, S. and Ozkan, E., and Raghavan, R.: "Pressure-Transient Behavior and Inflow Performance of Multiple Wells in Closed Systems," paper SPE 62988, presented at the 2000 SPE Annual Technical Meeting and Exhibition, Dallas, TX. Oct. 1-4, 2000.

Tang, Yula, Ozkan, E., Kelkar, M., Sarica, C., and Yildiz, T.: "Performance of Horizontal Wells Completed with Slotted Liners and Perforations," paper SPE/Petroleum Society of CIM 65516, presented at the 2000 SPE/Petroleum Society of CIM International Conference on Horizontal Well Technology, Calgary, Alberta, Canada, Nov. 6-8, 2000.

Al-Ajmi, N., Kazemi, H., and Ozkan, E.: "Estimation of Storativity Ratio in a Layered Reservoir with Crossflow," paper SPE 84294, presented at the SPE Annual Technical Conference and Exhibition held in Denver, Colorado, 5-8 October 2003

Atan, S., Al-Matrook, M., Kazemi, H., and Ozkan, E.: "Dual-Mesh Simulation of Reservoir Heterogeneity in Single- and Dual- Porosity Problems," paper SPE 93294, presented at the 2005 SPE Reservoir Simulation Symposium, held in Houston, Texas, 31 January-2 February 2005

Atan, S., Al-Matrook, M., Dreier, J., M., Kazemi, H., and Ozkan, E.: "Multilevel Fracture Network Modeling of Naturally Fractured Reservoirs," paper SPE 93053, presented at the 2005 SPE Reservoir Simulation Symposium, held in Houston, Texas, 31 January-2 February 2005

Al-Mohannadi, N., Ozkan, E., and Kazemi, H.: "Grid System Requirements in Numerical Modeling of Pressure-Transient Tests in Horizontal Wells," paper SPE 92041, presented at the 2004 SPE International Petroleum Conference in Mexico held in Puebla, Mexico, 8-9 November 2004

Al-Kobaisi, M., Ozkan, E., and Kazemi, H.: "A Hybrid Numerical-Analytical Model of Finite-Conductivity Vertical Fractures Intercepted by a Horizontal Well," paper SPE 92040, presented at the 2004 SPE International Petroleum Conference in Mexico held in Puebla, Mexico, 8-9 November 2004

Dreier, J., Ozkan, E., and Kazemi, H.: "New Analytical Pressure-Transient Models to Detect and Characterize Reservoirs With Multiple Fracture Systems," paper SPE 92039, presented at the 2004 SPE International Petroleum Conference in Mexico held in Puebla, Mexico, 8-9 November 2004

Araujo, H., Lacentre, P., Zapata, T., Del Monte, A., Dzelalija, F., Gilman, J., Meng, H-Z., Kazemi, H., and Ozkan, E.: "Dynamic Behavior of Discrete Fracture Network (DFN) Models," paper SPE 91940, presented at the 2004 SPE International Petroleum Conference in Mexico held in Puebla, Mexico, 8-9 November 2004

Tavares, C., Kazemi, H., and Ozkan, E.: "Combined Effect of Non-Darcy Flow and Formation Damage on Gas Well Performance of Dual-Porosity and Dual-Permeability Reservoirs," paper SPE 90623, presented at the 2004 SPE Annual Technical Conference and Exhibition held in Houston, Texas, U.S.A., 26-29 September 2004

Al-Mohannadi, N., Ozkan, E., and Kazemi, H.: "Pressure-Transient Responses of Horizontal and Curved Wells in Anticlines and Domes," paper SPE 84378, presented at the 2003 SPE Annual Technical Conference and Exhibition held in Denver, Colorado, U.S.A., 5-8 October 2003

Al-Khamis, M., Ozkan, E., and Raghavan, R.: "Analysis of Interference Tests with Horizontal Wells," paper SPE 84292, presented at the 2003 SPE Annual Technical Conference and Exhibition held in Denver, Colorado, 5-8 October 2003

Ozkan, E., and Keefer, B., and Miller, M.: "Optimization of Plunger-Lift Performance in Liquid Loading Gas Wells," paper SPE 84135, presented at the 2003 SPE Annual Technical Conference and Exhibition held in Denver, Colorado, 5-8 October 2003

Dominguez, A. A. and Ozkan, E.: "An Account of Decline-Type-Curve Analysis of Vertical, Fractured, and Horizontal Well Production Data," paper SPE 77690, presented at the 2002 SPE Annual Technical Conference and Exhibition held in San Antonio, Texas, 29 September-2 October 2002

Tang, Y. Yildiz, T., Ozkan, E., and Kelkar, M.: "Effects of Formation Damage and High-Velocity Flow on the Productivity of Perforated Horizontal Wells," paper SPE 77534, presented at the 2002 SPE Annual Technical Conference and Exhibition held in San Antonio, Texas, 29 September-2 October 2002

Cardona, R., Ozkan, E., and Batzle, M.: "Integrating Pressure-Transient and Seismic Data to Determine the Characteristics of Single- and Double-Porosity Reservoirs," paper SPE 77451, presented at the 2002 SPE Annual Technical Conference and Exhibition held in San Antonio, Texas, 29 September-2 October 2002

Tang, Yula, Ozkan, E., Kelkar, M., Sarica, C., and Yildiz, T.: "Fast and Accurate Correlations to Compute the Perforation Pseudoskin and Productivity of Horizontal Wells," paper SPE 71638, presented at the 2001 SPE Annual Technical Conference and Exhibition held in New Orleans, Louisiana, 30 September-3 October 2001.

Al-Khamis, M., Ozkan, E., and Raghavan, R.: "Interference Testing with Horizontal Observation Wells," paper SPE 71581, presented at the 2001 SPE Annual Technical Conference and Exhibition held in New Orleans, Louisiana, 30 September-3 October 2001.

Al-Kobaisi, M., Ozkan, E., and Kazemi, H.: "A Hybrid Numerical-Analytical Model of Finite-Conductivity Vertical Fractures Intercepted by a Horizontal Well," paper SPE 92040, presented at the 2004 SPE International Petroleum Conference in Mexico held in Puebla, Mexico, 8-9 November 2004.

Al-Mohannadi, N., Ozkan, E., and Kazemi, H.: "Grid System Requirements in Numerical Modeling of Pressure-Transient Tests in Horizontal Wells," paper SPE 92041, presented at the 2004 SPE International Petroleum Conference in Mexico held in Puebla, Mexico, 8-9 November 2004.

Al-Ajmi N. M., Kazemi, H. and Ozkan, E.: "Estimation of Storativity Ratio in a Layered Reservoir with Crossflow," paper SPE 84294, presented at the SPE 2003 Annual Technical Conference and Exhibition in Denver, CO, Oct. 5-8, 2003.

Atan, S., Ozkan, E., Kazemi, H.: "Numerical Simulation of Multiphase Flow in Multiscale Heterogeneous Reservoirs Using Multimesh Computing Methodology," Istanbul Technical University, Petroleum and Natural Gas Engineering Department, 15th Petroleum and Natural Gas Seminar and Exhibition, Istanbul, Turkey, June 30 - July 1, 2005.

Kazemi, H., Atan, S., Al-Matrook, M., Dreier, J., and Ozkan, E.: "Multilevel Fracture Network Modeling of Naturally Fractured Reservoirs," paper SPE 93053, presented at the 2005 SPE Reservoir Simulation Symposium held in Houston, TX, 31 January 2005 - 2 February 2005.

Dreier, J., Ozkan, E., and Kazemi, H.: "New Analytical Pressure-Transient Models to Detect and Characterize Reservoirs with Multiple Fracture Systems," paper SPE 92039, presented at the 2004 SPE International Petroleum Conference in Mexico held in Puebla, Mexico, 8-9 November 2004.

Araujo, H., Lacentre, P., Zapata, T., Del Monte, A., Dzelalija, F., Gilman, J., Meng, H-Z., Kazemi, H., and Ozkan, E.: "Dynamic Behavior of Discrete Fracture Network (DFN) Models," paper SPE 91940, presented at the 2004 SPE International Petroleum Conference in Mexico held in Puebla, Mexico, 8-9 November 2004.

Atan, S., Al-Matrook, M., Kazemi, H., Ozkan, E., and Gardner, M.: "Dual-Mesh Simulation of Reservoir Heterogeneity in Single- and Dual- Porosity Problems," paper SPE 93294, presented at the 2005 SPE Reservoir Simulation Symposium held in Houston, TX, 31 January 2005 - 2 February 2005.

Kazemi, H., Atan, S., Al-Matrook, M., Dreier, J., and Ozkan, E.: "Multilevel Fracture Network Modeling of Naturally Fractured Reservoirs," paper SPE 93053, presented at the 2005 SPE Reservoir Simulation Symposium held in Houston, TX, 31 January 2005 - 2 February 2005.

Tang, Y., Yildiz, T., Ozkan, E., and Kelkar, M.: "Effects of Formation Damage and High-Velocity Flow on the Productivity of Slotted-Liner Completed Horizontal Wells," paper SPE 101987, presented at the SPE International Oil & Gas Conference and Exhibition in China, Beijing, China, Dec. 5-7, 2006

Medeiros, F., Jr., Ozkan, E., and Kazemi, H.: "A Semianalytical, Pressure-Transient Model for Horizontal and Multilateral Wells in Composite, Layered, and Compartmentalized Reservoirs," paper SPE 102834, presented at the SPE Annual Technical Conference and Exhibition, San Antonio, TX, Sept. 24-27, 2006.

Aguilar, C., Ozkan, E., Kazemi, H., Al-Kobaisi, M., and Ramirez, B.: "A Hybrid Numerical-Analytical Model of Finite-Conductivity Vertical Fractures Intercepted by a Horizontal Well," paper SPE 104581, presented in the SPE Middle East Oil Show, Bahrain, Kingdom of Bahrain, March 11-14, 2007.

Balogun, T., Kazemi, H., Ozkan, E., Al-Kobaisi, M., and Ramirez, B.: "Verification and Proper Use of Water-Oil Transfer Function for Dual-Porosity and Dual-Permeability Reservoirs" paper SPE 104580, presented in the SPE Middle East Oil Show, Bahrain, Kingdom of Bahrain, March 11-14, 2007.

Medeiros, F., Jr., Ozkan, E., and Kazemi, H.: "Productivity and Drainage Area of Fractured Horizontal Wells in Tight Gas Reservoirs," paper SPE 108110, presented at the SPE 2007 Rocky Mountain Oil & Gas Technology Symposium, Denver, Colorado, 16-18 April 2007.

Medeiros, F., Kurtoglu, B., Ozkan, E., and Kazemi, H.: "Analysis of Production Data From Hydraulically Fractured Horizontal Wells in Tight, Heterogeneous Formations," paper SPE 110848, presented at the SPE Annual Technical Conference and Exhibition, Anaheim, CA, 11-14 November 2007.

Medeiros, F., Kurtoglu, B., Ozkan, E., and Kazemi, H.: "Pressure-Transient Performances of Hydraulically Fractured Horizontal Wells in Locally and Globally Naturally Fractured Formations," paper SPE-IPTC 11781, presented at the International Petroleum Technology Conference, Dubai, U.A.E., 4-6 December 2007.

Ramirez, B., Kazemi, H., Ozkan, E., and Al-Matrook, M.: "Non-Darcy Flow Effects in Dual-Porosity, Dual-Permeability, Naturally Fractured Gas Condensate Reservoirs," paper SPE 109295, presented at the SPE Annual Technical Conference and Exhibition, Anaheim, CA, 11-14 November 2007.

Al-Kobaisi, M., Kazemi, H., Ramirez, B., Ozkan, E., and Atan, S.: "A Critical Review for Proper Use of Water-Oil-Gas Transfer Functions in Dual-Porosity Naturally Fractured Reservoirs - Part II," paper SPE-IPTC 11778, presented at the International Petroleum Technology Conference, Dubai, U.A.E., 4-6 December 2007.

Ramirez, B., Kazemi, H., Al-Kobaisi, M., Ozkan, E., and Atan, S.: "A Critical Review for Proper Use of Water/Oil/Gas Transfer Functions in Dual-Porosity Naturally Fractured Reservoirs—Part I," paper SPE 109821, presented at the SPE Annual Technical Conference and Exhibition, Anaheim, CA, 11-14 November 2007.

Kurtoglu, B., Medeiros, F., Jr., Ozkan, E., and Kazemi H.: "Semianalytical Representation of Wells and Near-Well Flow Convergence in Numerical Reservoir Simulation," paper SPE 116136, presented at the 2008 SPE Annual Technical Conference and Exhibition held in Denver, Colorado, Sept. 21-24, 2008.

Al-Ajmi, N., Ahmadi, M., Ozkan, E., and Kazemi, H.: "Numerical Inversion of Laplace Transforms in the Solution of Transient Flow Problems with Discontinuities," paper SPE 116255, presented at the 2008 SPE Annual Technical Conference and Exhibition held in Denver, Colorado, Sept. 21-24, 2008.

Davletbaev, A., Ozkan, E., Slabetskiy, A., Nikishov, V., and Usmanov, T.: "Testing and Analysis of Wells Producing Commingled Layers in Priobskoye Field," paper SPE 117411, presented at the 2008 SPE Russian Oil & Gas Technical Conference and Exhibition held in Moscow, Russia, Oct. 28-30, 2008.

Medeiros, F., Jr. and Ozkan, E.: "Semi-Analytical Simulation of Flow in Heterogeneous Reservoirs: Theory and Applications," paper presented at the 18th ITU Petroleum and Natural Gas Seminar and Exhibition, Istanbul, Turkey, June 19-20, 2008.

Al-Matrouk, M. F., Al-Kobaisi, M., Kazemi, H., and Ozkan, E.: "A Multidomain Approach to Multiscale Compositional Reservoir Simulation," paper 118223, presented at the SPE Reservoir Simulation Symposium, The Woodlands, Texas, Feb. 2-4, 2009.

Ozkan, E., Brown, M., Raghavan, R., and Kazemi, H.: "Comparison of Fractured Horizontal-Well Performance in Conventional and Unconventional Reservoirs," paper 121290, presented at the SPE Western Regional Meeting, San Jose, California, March 24-26, 2009.

Yetkin, C., Ramirez, B., Al-Kobaisi, M., Kazemi, H., and Ozkan, E.: "A Simple Method to Account for Permeability Anisotropy in Reservoir Models and Multi-Well Pressure Interference Tests," paper 122972, presented at the SPE Rocky Mountain Petroleum Technology Conference, Denver, Colorado, April 14-16, 2009.

Brown, M., Ozkan, E., Raghavan, R., and Kazemi, H.: "Practical Solutions for Pressure Transient Responses of Fractured Horizontal Wells in Unconventional Reservoirs," paper SPE 125043, presented at the 2009 SPE Annual Technical Conference and Exhibition held in New Orleans, Louisiana, Oct. 4-7, 2009.

Wu, J., Georgi, D., and Ozkan, E.: "Deconvolution of Wireline Formation Test Data," paper SPE 124220, presented at the 2009 SPE Annual Technical Conference and Exhibition held in New Orleans, Louisiana, Oct. 4-7, 2009.

Ozkan, E.: "Understanding and Modeling Fractured Horizontal Well Performance in Shale Reservoirs" presented at the 20th Petroleum and Natural Gas Engineering Seminar and Exhibition, Istanbul technical University, Maslak, Istanbul, Turkey, June 24-25, 2010.

Ozkan, E., Raghavan, R., and Apaydin, O. G.: "Modeling of Fluid Transfer from Shale Matrix to Fracture Network," paper SPE 134830, to be presented at the 2010 SPE Annual Technical Conference and Exhibition, Florence, Italy, Sept. 19-22, 2010.

Davletbaev, A., Baikov, V., Ozkan, E., Garipov, T., Usmanov, T., Asmandiyarov, R., Slabetskiy, A., and Nazargalin, E.: "Multi-Layer Steady-State Injection Test with Higher Bottomhole Pressure than the Formation Fracturing Pressure," paper SPE 136199, to be presented at the 2010 SPE Russian Oil & Gas Technical Conference and Exhibition, Moscow, Russia, Oct. 26-28, 2010.

Ozkan, E.: "On Non-Darcy Flow in Porous Media - Modeling Gas Slippage in Nano Pores," paper presented at the SIAM Conference on the Mathematical and Computational Issues in the Geosciences, Long Beach, California, March 21-24, 2011.

Kiani, M., Kazemi, H., Ozkan, E., Wu, Y-S.: "Pilot Testing Issues of Chemical EOR in Large Fractured Carbonate Reservoirs," paper 146840 presented at the SPE Annual Technical Conference and Exhibition, Oct. 30 -Nov. 2, 2011, Denver, CO

Apaydin, O. G., Ozkan, E., and Raghavan, R.: "Effect of Discontinuous Microfractures on Ultratight Matrix Permeability of a Dual-Porosity Medium," paper CSUG/SPE 147391 presented at the Canadian Unconventional Resources Conference, Calgary, Alberta, Canada, Nov. 15-17, 2011

Ozkan E.: "Oil and Gas Production from the Nano-Pores of Unconventional Reservoirs," paper presented at the 22nd Petroleum and Natural Gas Seminar, Istanbul Technical University, Maslak, Istanbul, Turkey, June 21-22, 2012

Ahmadi, M., Gonzalez, O. G., Ozkan, E., and Parsa, S. E.: "Improving Well-Performance-Data Analysis in Laplace Space by Using Cubic Splines and Boundary Mirroring," paper SPE 159734 to be presented at the SPE Annual Technical Conference and Exhibition held in San Antonio, Texas, USA, 8-10 October 2012.

Cho, Y., Apaydin, O. G., and Ozkan, E.: "Pressure-Dependent Natural-Fracture Permeability in Shale and its Effect on Shale-Gas Well Production," paper SPE 159801 to be presented at the SPE Annual Technical Conference and Exhibition held in San Antonio, Texas, USA, 8-10 October 2012.

Firincioglu, T., Ozkan, E., and Ozgen, C.: "Thermodynamics of Multiphase Flow in Unconventional Liquids-Rich Reservoirs," paper SPE 159869 to be presented at the SPE Annual Technical Conference and Exhibition held in San Antonio, Texas, USA, 8-10 October 2012.

Ozkan, S. Kurtoglu, B., and Ozkan, E.: "Long-Term Economic Viability of Production from Unconventional Liquids-Rich Reservoirs: The Case of Bakken Field," paper SPE 162901 to be presented at the 2012 SPE Hydrocarbon Economics and Evaluation Symposium held in Calgary, Alberta, Calgary, 24-25 September 2012.