dc.contributor.advisor | Rai, Chandra | |
dc.contributor.author | Chakravarty, Aditya | |
dc.date.accessioned | 2019-05-14T17:44:20Z | |
dc.date.available | 2019-05-14T17:44:20Z | |
dc.date.issued | 2019 | |
dc.identifier.uri | https://hdl.handle.net/11244/319741 | |
dc.description.abstract | The process of hydrocarbon production from unconventional resource shales begins with
identifying zones in the well which have the most favorable features – in terms of fluid content,
fluid flow and rock mechanical properties.
Both in the oilfield and in the laboratory, Nuclear Magnetic Resonance (NMR) based techniques
are used to characterize fluids in rock samples. Rock properties like fluid-filled porosity, fluid
type, wettability, pore size distribution can be estimated using NMR. By comparing the
laboratory results with the field data, the relationship between rock properties and production
behavior can be better understood. Routine laboratory NMR measurements are made at room
temperature while oilfield NMR tools capture measure data at reservoir temperature (usually
over 100°C). The difference in temperature makes the direct comparison of lab and log data
risky. While considerable literature exists on probing porous media with NMR at elevated
temperature, no reference exists on how temperature impacts NMR measurements in shales.
The present thesis summarizes 2 MHz NMR experiments made on shales and conventional
reservoir rock samples at reservoir temperature (110°C) and one atmospheric pressure. Based on
our results we outline key considerations in interpretation of 2 MHz NMR measurements in
porous media at elevated temperature which include: 1) temperature correction of NMR porosity
used for conventional rocks does not apply to shales. 2) mobilization of heavy hydrocarbon and
adsorbed water at elevated temperature leads to increase in measured NMR porosity at elevated
temperature in shales. 3) A revised equation is proposed to predict the NMR porosity of shales
at elevated temperature | en_US |
dc.language | en | en_US |
dc.subject | Unconventional petrophysics | en_US |
dc.subject | NMR | en_US |
dc.subject | Shales | en_US |
dc.subject | Interpretation | en_US |
dc.title | NMR Considerations in Shales at Elevated Temperature | en_US |
dc.contributor.committeeMember | Sondergeld, Carl | |
dc.contributor.committeeMember | Devegowda, Deepak | |
dc.date.manuscript | 2019-05-10 | |
dc.thesis.degree | Master of Science | en_US |
ou.group | Mewbourne College of Earth and Energy::Mewbourne School of Petroleum and Geological Engineering | en_US |