14-17 May 2018
New Orleans
US/Central timezone

A Sorption Based Study on the Effect of Supercritical CO2 Interaction with Clay and Organic-Rich Shales

15 May 2018, 16:52
2m
New Orleans

New Orleans

Poster + 3 Minute Pitch MS 1.01: Multi-scale Particulates Transport through Porous Media Saturated with Multi-Phase Fluids Parallel 5-F

Speaker

Ms Yijia Zhang (Colorado School of Mines )

Description

CO2 injection into reservoirs will change the state of stress in both reservoir and caprock formations due to poro-mechanical, thermal and chemical effects. As a result of induced stress, the caprock can be mechanically damaged or new fracture systems can be created. It is the objective of this study to determine the behavior of intact and fractured caprock when exposed to supercritical CO2 at elevated presussures, including the characterization of the physical, chemical and geomechanical process associated with fluid flow and storage in these systems. Hereby, a self-designed experimental apparatus that allows high pressure, supercritical CO2 adsorption and desorption measurement on powdered rock samples is built in order to create excess isotherm. Clay samples such as montmorillonite, illite and shale samples with different clay content and maturity are used as adsorbent to perform CO2 sorption experiment to study the corresponding adsorption capacity. Meanwhile, acoustic properties, such as P-wave, are also measured simultaneously during the adsorption process as a method to study the stiffness change of the sample. Standard protocol of conducting high-pressure adsorption experiment is written in order to eliminate possible error and improve reproducibility.

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Primary author

Ms Yijia Zhang (Colorado School of Mines )

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