Publications

PEER-REVIEWED ARTICLES

2022

  • J.G. Delgado, M.A. Pickarts, L.E. Zerpa, C.A. Koh. “Outlook on the role of natural surfactants on emulsion stability and gas hydrate anti agglomeration in crude oil systems,” Energy & Fuels, (2022). [doi: 10.1021/acs.energyfuels.2c01964]

2021

  • Y. Wang, B.C. Hutchinson, M.A. Pickarts, D.C. Salmin, V. Srivastava, C.A. Koh, L.E. Zerpa. “Hydrate bedding modeling in oil-dominated systems,” Fuel, 289:119901 (2021). [doi: 10.1016/j.fuel.2020.119901]
  • D.C. Salmin, A.A.A. Majid, J. Wells, D. Estanga, M. Rivero, D.T. Wu, L.E. Zerpa, C.A. Koh. “Study of hydrate anti-agglomerant dosage effectiveness in a high-pressure stirred autoclave equipped with particle-analysis probes,” SPE Journal, 26(3):1200-1212 (2021). [doi: 10.2118/202471-PA]
  • D.C. Salmin, J.G. Delgado-Linares, D.T. Wu, L.E. Zerpa. “Hydrate agglomeration in crude oil systems in which the asphaltene aggregation state is artificially modified,” SPE Journal, 26(3):1189-1199 (2021). [doi: 10.2118/204456-PA]

2020

  • Y. Wang, S. Subramanian, D. Estanga, A.A.A. Majid, S. Hu, D.C. Salmin, C.A. Koh, L.E. Zerpa. “Changing the hydrate management guidelines: From bench top experiments to CSMHyK field simulations,” Energy & Fuels, 34(11):13523-13535 (2020). [doi: 10.1021/acs.energyfuels.0c01055]
  • V. Srivastava, M.W. Eaton, C.A. Koh, L.E. Zerpa. “Quantitative framework for hydrate bedding and transient agglomeration,” Ind. Eng. Chem. Res., 59(27):12580-12589 (2020). [doi: 10.1021/acs.iecr.0c01763]
  • V. Srivastava, A.A.A. Majid, P. Warrier, G. Grasso, C.A. Koh, L.E. Zerpa. “Hydrate-bedding mechanisms in partially dispersed water/oil systems,” SPE Journal, 25(2):925-937 (2020). [doi: 10.2118/195579-PA]

2019

  • W. Yang, C.A. Koh, J. White, Z. Patel, L.E. Zerpa. “Hydrate Formation Management Simulations with Anti-Agglomerants and Thermodynamic Inhibitors in a Subsea Tieback,” Fuel, 252:458-468 (2019). [doi: 10.1016/j.fuel.2019.04.146]
  • J. Singh, D. Croce, L.E. Zerpa, B. Partington, J. Gamboa. “Experimental Evaluation of Nozzles to Mitigate Liquid Loading in Gas Wells,” Journal of Natural Gas Science & Engineering, 65:248-256 (2019). [doi: 10.1016/j.jngse.2019.03.009]
  • J. Singh, L.E. Zerpa, B. Partington, J. Gamboa. “Effect of nozzle geometry on critical-subcritical flow transitions,” Heliyon, 5(2) (2019). [doi: 10.1016/j.heliyon.2019.e01273]

2018

  • Y. Wang, C.A. Koh, J.A. Dapena, L.E. Zerpa. “A transient simulation model to predict hydrate formation rate in both oil- and water-dominated systems in pipelines,” Journal of Natural Gas Science & Engineering, 58:126-134 (2018). [doi: 10.1016/j.jngse.2018.08.010]
  • P. Chaudhari, L.E. Zerpa, A.K. Sum. “A correlation to quantify hydrate plugging risk in oil and gas pipelines based on hydrate transportability parameters,” Journal of Natural Gas Science & Engineering, 58:125-161 (2018). [doi: 10.1016/j.jngse.2018.08.008]
  • T.B. Charlton, M. Di Lorenzo, L.E. Zerpa, C.A. Koh, M.L. Johns, E.F. May, Z.M. Aman. “Simulating Hydrate Growth and Transport Behaviour in Gas-Dominant Flow,” Energy & Fuels, 32(2), 1012-1023 (2017). [doi: 10.1021/acs.energyfuels.7b02199]

2017

  • A.A.A. Majid, W. Lee, V. Srivastava, L. Chen, P. Warrier, G. Grasso, P. Vijayamohan, P. Chaudhari, E.D. Sloan, C.A. Koh, L.E. Zerpa. “Experimental Investigation of Gas-Hydrate Formation and Particle Transportability in Fully and Partially Dispersed Multiphase-Flow Systems Using a High-Pressure Flow Loop,” SPE Journal (2017). [doi: 10.2118/187952-PA]

2016

  • S. Wang, Z. Huang, Y-S. Wu, P.H. Winterfeld, L.E. Zerpa. “A semi-analytical correlation of thermal-hydraulic-mechanical behavior of fractures and its application to modeling reservoir scale cold water injection problems in enhanced geothermal reservoirs,” Geothermics, 64:81-95 (2016). [doi: 10.1016/j.geothermics.2016.04.005]
  • B.W.E. Norris, L.E. Zerpa, C.A. Koh, M.L. Johns, E.F. May, Z.M. Aman. “Rapid Assessment of Hydrate Blockage Risk in Oil-Continuous Flowlines,” Journal of Natural Gas Science & Engineering, 30:284-294 (2016). [doi: 10.1016/j.jngse.2016.01.035]

2015

  • Z.M. Aman, L.E. Zerpa, C.A. Koh, A.K. Sum. “Development of a Tool to Assess Hydrate-Plug-Formation Risk in Oil Dominant Pipelines,” SPE Journal (2015). [doi: 10.2118/174083-PA]

2013

  • L.E. Zerpa, I. Rao, Z.M. Aman, T.J. Danielson, C.A. Koh, E.D. Sloan, A.K. Sum. “Multiphase flow modeling of gas hydrates with a simple hydrodynamic slug flow model,” Chemical Engineering Science, 99:298-304 (2013). [doi: 10.1016/j.ces.2013.06.016]
  • S.V. Joshi, G.A. Grasso, P.G. Lafond, I. Rao, E. Webb, L.E. Zerpa, E.D. Sloan, C.A. Koh, A.K. Sum. “Experimental flowloop investigations of gas hydrate formation in high water cut systems,” Chemical Engineering Science, 97:198-209 (2013). [doi: 10.1016/j.ces.2013.04.019]

2012

  • L.E. Zerpa, E.D. Sloan, A.K. Sum, C.A. Koh. “Overview of CSMHyK: A transient hydrate formation model,” Journal of Petroleum Science and Engineering, 98-99: 122-129 (2012). [doi: 10.1016/j.petrol.2012.08.017]
  • L.E. Zerpa, E.D. Sloan, C.A. Koh, A.K. Sum. “Hydrate Risk Assessment and Restart Procedure Optimization of an Offshore Well Using a Transient Hydrate Prediction Model,” SPE Oil and Gas Facilities, 1(5):49-56 (2012). [doi: 10.2118/160578-PA]

2011

  • Luis E. Zerpa, Jean-Louis Salager, Carolyn A. Koh, E. Dendy Sloan, Amadeu K. Sum. “Surface Chemistry and Gas Hydrates in Flow Assurance,” Industrial Engineering Chemistry Research, 50(1): 188-197 (2011). [doi: 10.1021/ie100873k]

2007

  • Enrique Carrero, Nestor V. Queipo, Salvador Pintos, Luis E. Zerpa. “Global Sensitivity Analysis of Alkali-Surfactant-Polymer Enhanced Oil Recovery Processes,” Journal of Petroleum Science and Engineering, 58(1-2): 30-42 (2007). [doi: 10.1016/j.petrol.2006.11.007]

2005

  • Luis E. Zerpa, Nestor V. Queipo, Salvador Pintos, Jean-Louis Salager. “An Optimization Methodology of Alkaline-Surfactant-Polymer Flooding Processes Using Field Scale Numerical Simulation and Multiple Surrogates,” Journal of Petroleum Science and Engineering 47(3-4):197-208 (2005). [doi: 10.1016/j.petrol.2005.03.002]

2003

  • N. V. Queipo, L. E. Zerpa, J. Goicochea, A. J. Verde, S. Pintos, A. Zambrano. “A Model for the Integrated Optimization of Oil Production Systems,” Journal of Engineering with Computers. 19(2): 130-141 (2003). [doi: 10.1007/s00366-003-0255-1]
BOOK CHAPTERS
  • L.E. Zerpa, C.A. Koh. “Chapter 6: New Frontiers: Hydrates in Porous Media,” in Pore Scale Phenomena: Frontiers in Energy and Environment, Editors J. Poate, H. Kazemi, T. Illangasekare, and R. Kee. World Scientific 10:91-113 (2015).  [doi: 10.1142/9789814623063_0006]
PROCEEDINGS

2022

  • J.G. Delgado-Linares, M. Pohl, A.A.A. Majid, C. Yoda, N. Tanaka, L.E. Zerpa, M. Prasad, C.A. Koh. “Early detection and assessment of asphaltene precipitation and gas hydrate formation at field conditions,” Offshore Technology Conference, May 2022, Houston, TX, USA. [doi: 10.4043/31712-MS]

2021

  • J. Ismailova, A. Abdukarimov, B. Mombekov, D. Delikesheva, L.E. Zerpa, Z. Dairov. “A comparative evaluation of thermodynamic models for prediction of wax deposition,” Abu Dhabi Int. Petroleum Exhibition & Conference (ADIPEC), Abu Dhabi, UAE (2021). [doi: doi.org/10.2118/207984-MS]
  • S. Rocha, L.E. Zerpa. “Evaluation of closed-loop geothermal heat extraction concepts using reservoir simulation,” GRC Transactions, Vol. 45, San Diego, CA, USA (2021).
  • S. Oduwole, L.E. Zerpa, M. Pohl, J. Behura, M. Prasad. “Reservoir analysis of a CO2 sequestration site: Experiment-guided field scale modeling,” First International Meeting for Applied Geoscience & Energy (IMAGE21), Denver, CO, USA (2021). [doi: 10.1190/segam2021-3594722.1]
  • D. Croce, L.E. Zerpa. “Mechanistic model for the design and operation of an intermittent gas lift system for liquid loaded horizontal gas wells,” SPE Annual Technical Conference and Exhibition, September 2021, Dubai, UAE. [doi: 10.2118/205962-MS]
  • J.G. Delgado-Linares, A.A.A. Majid, L.E. Zerpa, C.A. Koh. “Reducing THI injection and gas hydrate agglomeration by under-inhibition of crude oil systems,” Offshore Technology Conference, August 2021, Houston, TX, USA. [doi: 10.4043/31161-MS]

2020

  • D. Croce, L.E. Zerpa. “Intermittent gas lift for liquid loaded horizontal wells in tight gas shale reservoirs,” SPE Artificial Lift Conference and Exhibition – Americas, 10–12 November 2020.[doi: 10.2118/201153-MS]
  • D. Croce, L.E. Zerpa. “Effect of Surface Tension on Sweeping Performance of Injected Gas During Intermittent Gas Lift in Liquid Loaded Horizontal Wells,” SPE Annual Technical Conference and Exhibition. 27–29 October 2020. [doi: 10.2118/201601-MS]
  • B. Geranutti, M. Pohl, S. Karimi, M. Prasad, L.E. Zerpa. “Geophysical measurements for detection of hydrate formation in coreflooding experiments with undersaturated oil and seawater injection,” SEG Annual Meeting, 12-14 October 2020. [doi: 10.1190/segam2020-3426878.1]
  • Z. Liu, E. Ozkan, L.E. Zerpa, X. Yin. “Molecular sieving of hydrocarbon mixture through nano-porous membranes,” Unconventional Resources Technology Conference, 12-14 October 2020, Austin, Texas, USA. [doi: 10.15530/urtec-2020-2809]
  • H. Qin, A. Qu, Y. Wang, L.E. Zerpa, C.A. Koh, S. Bodnar, S. Daly, T. Palermo, K. Mateen. “Predicting hydrate plugging risk in oil dominated systems using a transient hydrate film growth prediction tool,” Offshore Technology Conference, May 4-7, 2020, Houston, TX, USA. [doi: 10.4043/30545-MS]
  • M.A. Pickarts, D. Croce, L.E. Zerpa, C.A. Koh. “Gas hydrate formation & transportability during transient shut-in/restart conditions,” Offshore Technology Conference, May 4-7, 2020, Houston, TX, USA. [doi: 10.4043/30857-MS]
  • J.G. Delgado-Linares, D.C. Salmin, H. Stoner, D,T, Wu, L.E. Zerpa, C.A. Koh, K. Mateen, S. Bodnar, P. Prince, A. Teixeira. “Effect of alcohols on asphaltene-particle size and hydrate non-plugging behavior of crude oils,” Offshore Technology Conference, May 4-7, 2020, Houston, TX, USA. [doi: 10.4043/30916-MS]

2019

  • T.B. Charltom, B.W.E. Norris, M.L. Johns, E.F. May, Z.M. Aman, L.E. Zerpa, C.A. Koh. “Predicting hydrate film growth on the wall from water droplet deposition in gas-dominant flowlines,” 19th International Conference on Multiphase Production Technology, June 5-7, 2019, Cannes, France. [Link]
  • Y. Wang, L.M. Rivero, T. Palermo, C.A. Koh, L.E. Zerpa. “Assessing Hydrate Formation in a Gas Condensante Subsea Tieback using a Transient Hydrate Simulation Tool,” Offshore Technology Conference, May 6-9, 2019, Houston, TX, USA. [doi: 10.4043/29280-MS]
  • D. Costa Salmin, J. Delgado-Linares, D. T. Wu, L.E. Zerpa, C.A. Koh. “Hydrate Agglomeration in Crude Oil Systems in Which the Asphaltene Aggregation State is Artificially Modified,” Offshore Technology Conference, May 6-9, 2019, Houston, TX, USA. [doi: 10.4043/29484-MS]
  • H. Qin, V. Srivastava, H. Wang, L.E. Zerpa, C.A. Koh. “Machine Learning Models to Predict Gas Hydrate Plugging Risks Using Flowloop and Field Data,” Offshore Technology Conference, May 6-9, 2019, Houston, TX, USA. [doi: 10.4043/29411-MS]
  • T.B. Charlton, S. Kegg, J.E.P. Morgan, L.E. Zerpa, C.A. Koh, E.F. May, Z.M. Aman. “Application of a Transient Deposition Model for Hydrate Management in a Subsea Gas-Condensate Tieback,” Offshore Technology Conference, May 6-9, 2019, Houston, TX, USA. [doi: 10.4043/29237-MS]

2018

  • Y. Wang, C.A. Koh, L.E. Zerpa. “Studies of parameters that influence hydrate plugging tendencies in a gas condensate subsea tieback,” 11th North American Conference on Multiphase Production Technology, June 6-8, 2018, Banff, Canada. [Link]
  • Y. Wang, C.A. Koh, L.E. Zerpa. “Modeling Hydrate Formation Management with Anti-Agglomerant Injection in a Subsea Tieback,” Offshore Technology Conference, April 30 – May 3, 2018, Houston, TX, USA. [doi: 10.4043/28937-MS]
  • Z.M. Aman, H. Qin, M. Pickarts, M.D. Lorenzo, E.F. May, C.A. Koh, L.E. Zerpa. “Deposition and Shear Stress Initial Investigations for Hydrate Blockage,” Offshore Technology Conference, April 30 – May 3, 2018, Houston, TX, USA. [doi: 10.4043/28777-MS]
  • T.B. Charlton, L.E. Zerpa, C.A. Koh, E.F. May, Z.M. Aman. “Predicting Hydrate Blockage Formation in Gas-Dominant Systems,” Offshore Technology Conference Asia, March 20-23, 2018, Kuala Lumpur, Malaysia. [doi: 10.4043/28311-MS]

2017

  • L.E. Zerpa, F. Gao, S. Wang. “An Analytical Solution and Numerical Modeling Study of Gas Hydrate Saturation Effects on Porosity and Permeability of Porous Media,” AGU Fall Meeting, December 11-15, 2017, New Orleans, Louisiana, USA. [Link]
  • V. Srivastava, J.A. Dapena, T.B. Charlton, A.A.A. Majid, M.N. Khan, Y. Wang, Z.A. Aman,L.E. Zerpa, D.T. Wu, C.A. Koh. “Effect of Particle Concentration and Size Distribution on Hydrate Bedding and Plugging Mechanisms,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • Z. Liu, L.E. Zerpa. “A Numerical Method to Quantify Hydrate Deposition in Subsea Gas Pipelines During Depressurization,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • J.A. Dapena, E.D. Sloan, L.E. Zerpa, D.T. Wu, C.A. Koh. “Characterization of Fluid-Driven Intermittent Particle Flow at Restrictions for Early Detection of Particle Jamming in Flowlines,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • Y. Wang, C.A. Koh, L.E. Zerpa. “A Transient Hydrate Formation Model that Combines Oil- and Water- Dominated Systems,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • T.B. Charlton, L.E. Zerpa, C.A. Koh, M. Di Lorenzo, K.A. Kozielski, M.L. Johns, E.F. May, Z.M. Aman. “Hydrate Blockage Formation in Gas-Dominant Systems,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • T.B. Charlton, A.A.A. Majid, L.E. Zerpa, M.L. Johns, E.F. May, Z.M. Aman, C.A. Koh. “Oil- and Water-Continuous Hydrate Formation Experiments in a Lab-Scale Vertical Flowloop,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • J.A. Dapena, A.A.A. Majid, M.N. Khan, V. Srivastava, Y. Wang, T.B. Charlton, B. Bbosa, A. Waturuocha, M. Volk, E.D. Sloan, L.E. Zerpa, D.T. Wu, C.A. Koh. “Hydrate Slurry Characterization in the Presence of Anti-Agglomerants: Connecting High Pressure Rheometer Studies with Flowloop Tests Results,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • J.A. Dapena, V. Srivastava, Y. Wang, M.N. Khan, A.A.A. Majid, T.B. Charlton, E.D. Sloan, L.E. Zerpa, D.T. Wu, C.A. Koh. “Influence of Flowloop Parameters on Hydrate Slurry Transportability Studies,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • S. Ju, M. Chun, L.E. Zerpa, C.A. Koh. “Rocking Cell Tests for Hydrate Formation, Bedding and Deposition in the Presence of Anti-Agglomerants and Salts,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • Z. Liu, L.E. Zerpa. “A Theoretical Model to Estimate the Mechanical Properties of Gas Hydrate Deposits on Pipeline Wall and its Implications for Deposit Sloughing,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • H. Qin, A.A.A. Majid, T.B. Charlton, D.T. Wu, L.E. Zerpa, C.A. Koh. “Investigations of a Hydrate Deposition Mechanism in Multiphase Flow Conditions using a High Pressure Lab-Scale Loop,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • D. Salmin, J.A. Dapena, L.E. Zerpa, D.T. Wu, J.L. Creek, D. Estanga, M. Rivero, C.A. Koh. “Investigations of Emulsion Behavior at Hydrate Onset in a High Pressure Stirred Autoclave,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • V. Srivastava, M.N. Khan, T.B. Charlton, J.A. Dapena, A.A.A. Majid, Z.M. Aman, D.T. Wu, C.A. Koh, L.E. Zerpa. “Industrial-Scale Flowloop Measurements to Investigate Hydrate Growth Mechanisms in High Pressure Saline Systems,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • V. Srivastava, T.B. Charlton, D.C. Salmin, J.A. Dapena, P. Warrier, Z.M. Aman, L.E. Zerpa, C.A. Koh, D.T. Wu. “Water Droplet Size Measurements and Modeling for Partially Dispersed Systems using a High Pressure Industrial-Scale Flowloop,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • S. Wang, S. Hu, J. Zhao, M. Nakatsuka, V. Veedu, D.T. Wu, L.E. Zerpa, C.A. Koh. “Gas Hydrate Particle – Surface Interactions Under High Pressure & Low Temperature Conditions,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • Y. Wang, C.A. Koh, L.E. Zerpa. “Numerical Transient Simulation Study of a Real Subsea Tieback System with Anti-Agglomerants Using the CSMHyK Hydrate Formation Model,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • T.B. Charlton, V. Srivastava, D. Salmin, L.E. Zerpa, C.A. Koh, M.L. Johns, E.F. May, Z.M. Aman. “A Quantitative Analysis of Hydrate Agglomerate Fractal Dimensions,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • N.A. Ismail, K. Keefe, A.A.A. Majid, L.E. Zerpa, C.A. Koh. “Characterization of Binary Clathrate Hydrates using DSC and Raman Spectroscopy,” 9th International Conference on Gas Hydrates, June 25-30, 2017, Denver, Colorado, USA.
  • J.A. Dapena, A.A. Majid, Y. Wang, T.B. Charlton, A.A. Gardner, E.D. Sloan, L.E. Zerpa, D.T. Wu, C.A. Koh. “Gas Hydrate Management Strategies Using Anti-Agglomerants: Continuous and Transient Large-Scale Flowloop Studies,” Offshore Technology Conference, May 1-4, 2017, Houston, Texas, USA. [doi: 10.4043/27621-MS]
  • V. Srivastava, A.A. Majid, P. Warrier, G. Grasso, P. Chaudhari, E.D. Sloan, C.A. Koh, D.T. Wu, L.E. Zerpa. “Hydrate Formation and Transportability Investigations in a High-Pressure Flowloop During Transient Shut-In/Restart Operations,” Offshore Technology Conference, May 1-4, 2017, Houston, Texas, USA. [doi: 10.4043/27849-MS]
  • D.C. Salmin, A.A. Majid, J. Wells, E.D. Sloan, D. Estanga, G. Kusinski, M. Rivero, J. Gomes, D.T. Wu, L.E. Zerpa, C.A. Koh. “Study of Anti-Agglomerant Low Dosage Hydrate Inhibitor Performance,” Offshore Technology Conference, May 1-4, 2017, Houston, Texas, USA. [doi: 10.4043/27911-MS]
  • T. Charlton, H. Qin, L.E. Zerpa, M.L. Johns, E.F. May, C.A. Koh, Z.M. Aman. “Hydrate Deposit Formation and Dissociation in Gas-Dominant Systems: Experiments and Modelling Using a High-Pressure Miniloop,” AIChE 5th International Conference on Upstream Engineering and Flow Assurance, March 27-29, 2017, Houston, Texas, USA. [Link]
  • T. Charlton, A.A. Majid, L.E. Zerpa, M.L. Johns, E.F. May, Z.M. Aman, C.A. Koh. “Hydrate Formation Experiments in a Lab-Scale Vertical Flowloop,” AIChE 5th International Conference on Upstream Engineering and Flow Assurance, March 27-29, 2017, Houston, Texas, USA. [Link]

2016

  • M. Zhou, J.K. Cho, L.E. Zerpa, C. Augustine. “Optimization of well configuration for a sedimentary enhanced geothermal reservoir,” GRC Transactions Volume 40, October 23-26, 2016, Sacramento, California, USA. [Link]
  • Z. Liu, L.E. Zerpa. “Preliminary Study of Liquid Loading Problems of Gas Hydrate Wells and Selection of Artificial Lift Methods,” SPE Western Regional Meeting, May 23-26, 2016, Anchorage, Alaska, USA. [doi: 10.2118/180391-MS]
  • Z. Liu, L.E. Zerpa, Y. Wang. “Hydrate Problems for Gas Lift Operation for Deepwater and Arctic Wells and Best Practices for Prevention,” SPE Western Regional Meeting, May 23-26, 2016, Anchorage, Alaska, USA. [doi: 10.2118/180392-MS]
  • A. Abdul Majid, W. Lee, V. Srivastava, L. Chen, G.A. Grasso, P. Vijayamohan, P. Chaudhari, D. Sloan, C.A. Koh, L.E. Zerpa. “The Study of Gas Hydrate Formation and Particle Transportability Using A High Pressure Flowloop,” Offshore Technology Conference, May 2-5, 2016, Houston, TX, USA. [doi: 10.4043/27276-MS]
  • T. Charlton, L.E. Zerpa, C.A. Koh, E.F. May, M.L. Johns, Z.M. Aman. “Risk-Based Estimation of Hydrate Blockage Risk in Oil and Gas Flowlines,” 2016 AIChE Spring Meeting, April 10-14, 2016, Houston, TX, USA.
  • B.W.E. Norris, L.E. Zerpa, C.A. Koh, E.F. May, M.L. Johns, Z.M. Aman. “Hydrate Blockage Formation in Gas-Dominant Systems,” 2016 AIChE Spring Meeting, April 10-14, 2016, Houston, TX, USA.

2015

  • L.E. Zerpa, J.K. Cho, C. Augustine. “Assessing the Effect of Realistic Reservoir Features on the Performance of Sedimentary Geothermal Systems,” GRC Transactions Volume 39, September 20-23, 2015, Reno, Nevada, USA. [Link]
  • S. Wang, Y.S. Wu, P. Winterfeld, L.E. Zerpa. “Numerical Study of the Thermal-Hydraulic-Mechanical Behavior of Fractured Geothermal Reservoirs,” Fortieth Workshop on Geothermal Reservoir Engineering, January 26-28, 2015, Stanford, California, USA. [Link]
  • J.K. Cho, C. Augustine, L.E. Zerpa. “Validation of a Numerical Reservoir Model of Sedimentary Geothermal Systems Using Analytical Models,” Fortieth Workshop on Geothermal Reservoir Engineering, January 26-28, 2015, Stanford, California, USA. [Link]

2014

  • L.E. Zerpa, Z.M. Aman, I. Rao, S. Joshi, E.D. Sloan, C.A. Koh, A.K. Sum. “Development of a Comprehensive Model for Transient Hydrate Formation in Pipelines: Overview and Applications,” 8th International Conference on Gas Hydrates, July 28 – August 1, 2014, Beijing, China.
  • P.N. Chaudhari, C.A. Koh, E.D. Sloan, A.K. Sum, L.E. Zerpa, Z.M. Aman. “CSMHYFAST: A tool for Hydrates in Flow Assurance,” 8th International Conference on Gas Hydrates, July 28 – August 1, 2014, Beijing, China.
  • P.N. Chaudhari, C.A. Koh, E.D. Sloan, A.K. Sum, L.E. Zerpa. “Defining Hydrate Plugging Risk in Oil Dominated Systems,” 8th International Conference on Gas Hydrates, July 28 – August 1, 2014, Beijing, China.
  • G.A. Grasso, P.G. Lafond, Z.M. Aman, L.E. Zerpa, E.D. Sloan, C.A. Koh, A.K. Sum. “Hydrate Formation in Flowloop Experiments,” 8th International Conference on Gas Hydrates, July 28 – August 1, 2014, Beijing, China.

2013

  • Z.M. Aman, L.E. Zerpa, G. Grasso, W.E. Leith, E.D. Sloan, A.K. Sum, C.A. Koh. “Interfacial tension and mineral adhesion properties of cyclopentane hydrate,” Unconventional Resources Technology Conference, 12 – 14 August 2013, Denver, Colorado, USA. [doi: 10.1190/URTEC2013-235]
  • Rao, L.E. Zerpa, E.D. Sloan, C.A. Koh, A.K. Sum. “Multiphase flow modeling of gas-water-hydrate systems,” Offshore Technology Conference, 6 – 9 May 2013, Houston, Texas, USA. [doi: 10.4043/24099-MS]

2012

  • Z.M. Aman, L.E. Zerpa, G. Grasso, K. Springer, E.D. Sloan, A.K. Sum, C.A. Koh. “Modeling hydrate formation and aggregation in oil-dominated systems,” 2012 AIChE Annual Meeting, 28 October – 2 November 2012, Pittsburgh, Pennsylvania, USA.
  • L.E. Zerpa, I. Rao, Z.M. Aman, E.D. Sloan, C.A. Koh, A.K. Sum. “Extension of a Simple Hydrodynamic Slug Flow Model for Transient Hydrate Kinetics,” 8th North American Conference on Multiphase Technology, 20 – 22 June, 2012, Banff, Canada. [Link]
  • L.E. Zerpa, Z.M. Aman, S. Joshi, I. Rao, E.D. Sloan, C.A. Koh, A.K. Sum. “Predicting Hydrate Blockages in Oil, Gas and Water-Dominated Systems,” Offshore Technology Conference, 30 April–3 May 2012, Houston, Texas, USA. [doi: 10.4043/23490-MS]

2011

  • L.E. Zerpa, E.D. Sloan, C.A. Koh, A.K. Sum. “Hydrate Risk Assessment and Restart Procedure Optimization of an Offshore Well Using a Transient Hydrate Prediction Model,” OTC Brasil, 4-6 October 2011, Rio de Janeiro, Brazil. [doi: 10.4043/22406-MS]
  • S. Joshi, I. Rao, L.E. Zerpa, E. Webb, P. Lafond, E.D. Sloan, A.K. Sum, C.A. Koh. “Understanding hydrate plug formation from high water cut systems with a four inch flowloop,” 7th International Conference on Gas Hydrates, 17-21 July 2011, Edinburgh, Scotland, United Kingdom. [Link]
  • L.E. Zerpa, E.D. Sloan, A.K. Sum, C.A. Koh. “CSMHyK transient hydrate kinetics model: a tool for generation of best practices in flow assurance,” 7th International Conference on Gas Hydrates, 17-21 July 2011, Edinburgh, Scotland, United Kingdom. [Link]
  • L.E. Zerpa, E.D. Sloan, A.K. Sum, C.A. Koh. “Overview of CSMHYK: a transient hydrate formation model developed over a decade of hydrate research,” 7th International Conference on Gas Hydrates, 17-21 July 2011, Edinburgh, Scotland, United Kingdom. [Link]
  • L.E. Zerpa, E.D. Sloan, A.K. Sum, C.A. Koh. “Generation of Best Practices in Flow Assurance Using a Transient Hydrate Kinetics Model,” Offshore Technology Conference, 2-5 May 2011, Houston, TX, USA. [doi: 10.4043/21644-MS]

2007

  • L.E. Zerpa, N.V. Queipo, S. Pintos, E. Tillero, D. Alter. “An Efficient Response Surface Approach for the Optimization of ASP Flooding Processes: ASP Pilot Project LL-03 Reservoir,” 2007 SPE Latin American and Caribbean Petroleum Engineering Conference, 15-18 April 2007. Buenos Aires, Argentina. [doi: 10.2118/107847-MS]

2004

  • L.E. Zerpa, N.V. Queipo, S. Pintos, J.L. Salager. “An Optimization Methodology of Alkaline-Surfactant-Polymer Flooding Processes Using Field Scale Numerical Simulation and Multiple Surrogates,” 2004 SPE/DOE Fourteenth Symposium on Improved Oil Recovery. 17-21 April 2004. Tulsa, Oklahoma, U.S.A. [doi: 10.2118/89387-MS]
PATENTS
  • D.D Croce, L.E. Zerpa. “Systems and methods of removing stagnant liquid from a hydrocarbon well” US Patent App. 17/095,440