Citation

BibTex format

@article{Cairns:2012,
author = {Cairns, G and Jakubowicz, H and Lonergan, L and Muggeridge, A},
journal = {International Journal of Greenhouse Gas Control},
pages = {316--325},
title = {Using time-lapse seismic monitoring to identify trapping mechanisms during CO2 sequestration},
volume = {11},
year = {2012}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - We show that it may be possible to distinguish between structurally- and capillary-trapped CO2 using time-lapse seismic monitoring of geological CO2 sequestration. Commercial reservoir simulation software was used to predict CO2 saturation in a saline aquifer over time. The output was combined with a rock physics model to calculate the elastic and seismic properties of the aquifer. As the seismic response depends on both fluid content and distribution, appropriate end-member fluid-distribution models were used to predict the possible range of seismic responses. We propose that different fluid-distribution models should be used for capillary- and structurally-trapped CO2 in a reservoir; the Hill average should be used for high, mobile CO2 saturations found during structural trapping whilst the Gassmann-Reuss average should be used for low, immobile CO2 saturations resulting from residual trapping. Far-offset seismic data was used to interpret reflections produced by the different trapping phases and cross-plotting was used to determine the trapping phase. Results indicate that structurally-trapped CO2 can be seismically imaged irrespective of fluid distribution and, importantly, a reflection may be generated off the interface between residually- and structurally-trapped CO2.
AU - Cairns,G
AU - Jakubowicz,H
AU - Lonergan,L
AU - Muggeridge,A
EP - 325
PY - 2012///
SP - 316
TI - Using time-lapse seismic monitoring to identify trapping mechanisms during CO2 sequestration
T2 - International Journal of Greenhouse Gas Control
VL - 11
ER -