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SUMMARY:Carbon storage in heterogeneous porous reservoirs - Graham Benham 
 (University of Cambridge)
DTSTART:20211202T113000Z
DTEND:20211202T123000Z
UID:TALK166588@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:The injection of CO2 into porous subsurface reservoirs is a te
 chnological means for removing anthropogenic emissions which relies on a s
 eries of complex porous flow properties. During injection\, geological het
 erogeneities\, often in the form of sedimentary layering\, can play a sign
 ificant role on CO2 migration through the action of small-scale capillary 
 forces. Despite the sensitivity of the flow to these heterogeneities\, it 
 is difficult to quantify them with detailed field measurements owing to th
 e vast range of scales involved\, presenting an outstanding challenge. In 
 this talk I will use some simple modelling approaches to investigate diffe
 rent types of heterogeneities and how they may affect CO2 migration\, maki
 ng comparisons with both field data and analogue experiments. To start wit
 h I will investigate the case of constant injection beneath an impermeable
  caprock\, for which the CO2 spreads out as a two-phase gravity current. M
 odelling this with an upscaled thin-film equation facilitates studying man
 y different arrangements of sedimentary layers to create ensemble forecast
 s for injection scenarios (as well as the uncertainty associated with such
  forecasts). I will discuss the role of heterogeneities in post-injection 
 migration\, as well as the different mechanisms for trapping CO2. Finally\
 , I will cover some recent work studying injection in extremely heterogene
 ous media\, for which large pressure gradients due to impermeable layers m
 ay delay transition to a buoyancy-driven flow for 1-100 years. 
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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