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Core Analysis in Unconventional Formations in the Presence of Complex Mineralogy, Organic Matter, and Tight Pore Structure

Friday, July 12, 2024

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Course Credit: 0.15 CEU, 1.5 PDH

Friday, July 12, 2024 | 10:00AM – 11:30AM CT

Complex composition, pore structure, and rock fabric (i.e., spatial distribution of solid/fluid rock components) make core analysis of unconventional and tight rocks such as organic-rich mudrocks extremely challenging. The conventional core analysis methods typically provide time-consuming options for assessment of saturation-dependent petrophysical properties such as relative permeability. Significant uncertainties are also reported for the petrophysical properties obtained from core measurements in unconventional tight rocks. These uncertainties are typically more significant for petrophysical properties estimated using conventional flow-based core measurement methods. Examples include permeability measurements and imbibition-based assessment of wettability. Another challenge in core-based assessment of petrophysical properties is the dependence of majority of conventional measurement techniques to perfect cylindrical shape of core plugs, which is typically hard to achieve in unconventional rocks. Finally, in the presence of complex pore structure, composition, and rock fabric in unconventional rocks, reliable rock physics models are required to translate measurements performed on rock samples to their petrophysical properties.

In this presentation, new unconventional methods will be introduced to enhance core measurements and analyses in organic-rich mudrocks. The introduced methods enable expedited and improved saturation of tight samples and provide possible solutions to deviate from perfectly-cut cylindrical core plugs for core measurements. Examples of methods developed for assessment of wettability and saturation-dependent relative permeability will be presented. Furthermore, the importance of reliable evaluation of properties of solid organic content in organic-rich mudrocks of a wide range of thermal maturity will be demonstrated. Outcomes of recent advancements in experimental research will be presented and the value of integration of experimental and computational work will be discussed. Impacts of these research developments include improved description of multi-phase fluid transport and reservoir characterization in spatially complex organic-rich mudrocks with the intent to enhance production and recovery factors.

All content contained within this webinar is copyrighted by Stefano Pruno and Zoya Heidari and its use and/or reproduction outside the portal requires express permission from Stefano Pruno and Zoya Heidari.

Webinar recordings will be available on-demand within 1 business day of the webinar completion.

For those who attended the live webinar, your certificate will be available in your “Learner Profile” within 1 business day of the webinar completion.

     1 chapter

    Course Chapters

    • 1Core Analysis in Unconventional Formations in the Presence of Complex Mineralogy, Organic Matter, and Tight Pore Structure
      Media Type: Webinar

      Complex composition, pore structure, and rock fabric (i.e., spatial distribution of solid/fluid rock components) make core analysis of unconventional and tight rocks such as organic-rich mudrocks extremely challenging. The conventional core analysis methods typically provide time-consuming options for assessment of saturation-dependent petrophysical properties such as relative permeability. Significant uncertainties are also reported for the petrophysical properties obtained from core measurements in unconventional tight rocks. These uncertainties are typically more significant for petrophysical properties estimated using conventional flow-based core measurement methods. Examples include permeability measurements and imbibition-based assessment of wettability. Another challenge in core-based assessment of petrophysical properties is the dependence of majority of conventional measurement techniques to perfect cylindrical shape of core plugs, which is typically hard to achieve in unconventional rocks. Finally, in the presence of complex pore structure, composition, and rock fabric in unconventional rocks, reliable rock physics models are required to translate measurements performed on rock samples to their petrophysical properties.

      In this presentation, new unconventional methods will be introduced to enhance core measurements and analyses in organic-rich mudrocks. The introduced methods enable expedited and improved saturation of tight samples and provide possible solutions to deviate from perfectly-cut cylindrical core plugs for core measurements. Examples of methods developed for assessment of wettability and saturation-dependent relative permeability will be presented. Furthermore, the importance of reliable evaluation of properties of solid organic content in organic-rich mudrocks of a wide range of thermal maturity will be demonstrated. Outcomes of recent advancements in experimental research will be presented and the value of integration of experimental and computational work will be discussed. Impacts of these research developments include improved description of multi-phase fluid transport and reservoir characterization in spatially complex organic-rich mudrocks with the intent to enhance production and recovery factors.

      All content contained within this webinar is copyrighted by Stefano Pruno and Zoya Heidari and its use and/or reproduction outside the portal requires express permission from Stefano Pruno and Zoya Heidari.

      Webinar recordings will be available on-demand within 1 business day of the webinar completion.

      For those who attended the live webinar, your certificate will be available in your “Learner Profile” within 1 business day of the webinar completion.

    Credits

    Earn credits by completing this course0.15 CEU credit1.5 PDH credits

    Speakers

    Stefano PrunoModeratorStefano Pruno is Stratum Reservoir Regional Technical Advisor for Core Analysis. He has a university background in Geology (MSc), working in the core analysis domain for approx. 25 years, with Stratum Reservoir for the last 15 years. Main fields of expertise are core analysis data evaluation, interpretation in addition to core analysis program design, planning and data management.
    Zoya HeidariSpeakerZoya Heidari is an Associate Professor in the Hildebrand Department of Petroleum and Geosystems Engineering at The University of Texas at Austin. She has contributed to the science of rock-fluid characterization and Formation Evaluation through integrated analysis of multi-scale formation data. Zoya has been the founder and director of the UT Austin Industrial Affiliate Research Program on “Multi-Scale Rock Physics” since 2016. She was also the founder and the director of the Texas A&M Joint Industry Research Program on “Multi-Scale Formation Evaluation of Unconventional and Carbonate Reservoirs” from 2012 to 2015. Zoya has received numerous awards, including the 2023 SPE International Formation Evaluation Award, the 2021 SPWLA Distinguished Technical Achievement Award, the 2020 SPWLA Young Professional Technical Award, the 2019 EAGE Arie van Weelden Award, the 2019 AIME Rossiter W. Raymond Memorial Award, the 2019 SPE Distinguished Membership Award, and the 2017 SPE Cedric K. Ferguson Medal. Zoya has published more than 230 papers in peer-reviewed journals and conference proceedings. She has served as a member of the SPE reservoir advisory committee and as an executive editor for the SPE Journal since 2022, and as an Associate Editor for the SPE Reservoir Evaluation & Engineering Journal and Geophysics Journal. Her research interests include Petrophysics, Rock Physics, Multi-Scale Formation Evaluation, Borehole Geophysics, Integrated Reservoir Characterization, and Completion Petrophysics.