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Institute of Subsurface Energy Systems
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Internship for Master's students

Objectives:

6-month internship focused on developing an understanding of the possibility of simulating the effects of thermal and pressure stresses on casing, cement, reservoir, and cap rock during cyclic CO2 injection using the GEM simulator from CMG. It is essential to develop a workflow and numerical model to reproduce the results of laboratory experiments conducted by TUBAF. Depending on performance, the internship may be extended into a master’s thesis.

Tasks and deliverables:

  • Gain a thorough understanding of GEM’s functionality in coupled fluid flow, geochemistry, and geomechanics.
  • Build a conceptual model to represent the interaction between casing, cement, reservoir, and cap rock under different pressure-temperature injection conditions based on laboratory experiments.
  • Support the development of an approach for upscaling lab results to field scale

Requirements:

  • Expertise in numerical reservoir and geomechanical modeling
  • Expertise in fluid and rock mechanics
  • Basic experience with CMG GEM or any other product from the CMG family is a plus

References:

  1. Pratanu Roy, Joseph P. Morris, Stuart D.C. Walsh, Jaisree Iyer, Susan Carroll, Effect of thermal stress on wellbore integrity during CO2 injection, International Journal of Greenhouse Gas Control, Volume 77, 2018, Pages 14-26, ISSN 1750-5836, https://doi.org/10.1016/j.ijggc.2018.07.012.
  2. Sharad Kelkar, J. William Carey, David Dempsey, Kayla Lewis, Integrity of Pre-existing Wellbores in Geological Sequestration of CO2 – Assessment Using a Coupled Geomechanics-fluid Flow Model, Energy Procedia, Volume 63, 2014, Pages 5737–5748, ISSN 1876-6102,
  3. Roy, Pratanu & Walsh, Stuart & Morris, Joseph & Todorovic, Jelena & Gawel, Kamila & Iyer, Jaisree & Hao, Yue & Torsæter, Malin. (2016). Studying the Impact of Thermal Cycling on Wellbore Integrity during CO2 Injection. 10.13140/RG.2.1.1457.2404.

Location:

Kassel

Start/Duration:

ASAP, duration 6 months

Contact:

Institute of Subsurface Energy Systems
Department of Reservoir Engineering

Dr.-Ing. Bettina Jenei
bettina.@.jeneitu-clausthalde