The effect of CO2 phase on drainage process by analysis of transient differential pressure

Xiaoqiang Jin; Cong Chao; Kejian Wu; Changyou Xia; Xianfeng Fan

doi:10.1016/j.ces.2020.115581

The effect of CO2 phase on drainage process by analysis of transient differential pressure

Xiaoqiang Jin, Cong Chao, Kejian Wu, Changyou Xia, Xianfeng Fan^* (Corresponding Author)

^*Corresponding author for this work

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Abstract

CO2 sequestrated in deep geological formations can be in gaseous, supercritical or liquid state, depending on subsurface pressure and temperature. In this work, CO2 core flooding experiments were carried out to investigate the effect of CO2 phase on drainage process, especially parameters, such as capillary displacement pressure, relative permeability and displacement efficiency. The results indicated that CO2 phase significantly affected its breakthrough. The breakthrough took place with the least volume of injected liquid CO2 (LCO2) and with the largest volume of injected gas CO2 (gCO2). The capillary displacement pressure was measured based on the jump in the pressure profile and it showed the largest jump in gCO2 drainage. The relative permeability was the largest in LCO2-water displacement and the smallest in gCO2-water displacement. The displacement efficiency can be improved by increasing capillary number when it was smaller than a critical value around 2 × 10-8.

Original language	English
Article number	115581
Number of pages	13
Journal	Chemical Engineering Science
Volume	218
Early online date	17 Feb 2020
DOIs	https://doi.org/10.1016/j.ces.2020.115581
Publication status	Published - 8 Jun 2020

Keywords

CO2 phase
CO2 breakthrough time
Capillary displacement pressure
Relative permeability
Water recovery

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@article{1a06ddb05f9f443bbb7c59701bbc9fd4,

title = "The effect of CO2 phase on drainage process by analysis of transient differential pressure",

abstract = "CO2 sequestrated in deep geological formations can be in gaseous, supercritical or liquid state, depending on subsurface pressure and temperature. In this work, CO2 core flooding experiments were carried out to investigate the effect of CO2 phase on drainage process, especially parameters, such as capillary displacement pressure, relative permeability and displacement efficiency. The results indicated that CO2 phase significantly affected its breakthrough. The breakthrough took place with the least volume of injected liquid CO2 (LCO2) and with the largest volume of injected gas CO2 (gCO2). The capillary displacement pressure was measured based on the jump in the pressure profile and it showed the largest jump in gCO2 drainage. The relative permeability was the largest in LCO2-water displacement and the smallest in gCO2-water displacement. The displacement efficiency can be improved by increasing capillary number when it was smaller than a critical value around 2 × 10-8.",

keywords = "CO2 phase, CO2 breakthrough time, Capillary displacement pressure, Relative permeability, Water recovery",

author = "Xiaoqiang Jin and Cong Chao and Kejian Wu and Changyou Xia and Xianfeng Fan",

note = "Authors gratefully acknowledge the financial supports from China Scholarship Council (CSC) and UK India Education & Research Initiative (UKIERI). ",

year = "2020",

month = jun,

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doi = "10.1016/j.ces.2020.115581",

language = "English",

volume = "218",

journal = "Chemical Engineering Science",

issn = "0009-2509",

publisher = "PERGAMON-ELSEVIER SCIENCE LTD",

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TY - JOUR

T1 - The effect of CO2 phase on drainage process by analysis of transient differential pressure

AU - Jin, Xiaoqiang

AU - Chao, Cong

AU - Wu, Kejian

AU - Xia, Changyou

AU - Fan, Xianfeng

N1 - Authors gratefully acknowledge the financial supports from China Scholarship Council (CSC) and UK India Education & Research Initiative (UKIERI).

PY - 2020/6/8

Y1 - 2020/6/8

N2 - CO2 sequestrated in deep geological formations can be in gaseous, supercritical or liquid state, depending on subsurface pressure and temperature. In this work, CO2 core flooding experiments were carried out to investigate the effect of CO2 phase on drainage process, especially parameters, such as capillary displacement pressure, relative permeability and displacement efficiency. The results indicated that CO2 phase significantly affected its breakthrough. The breakthrough took place with the least volume of injected liquid CO2 (LCO2) and with the largest volume of injected gas CO2 (gCO2). The capillary displacement pressure was measured based on the jump in the pressure profile and it showed the largest jump in gCO2 drainage. The relative permeability was the largest in LCO2-water displacement and the smallest in gCO2-water displacement. The displacement efficiency can be improved by increasing capillary number when it was smaller than a critical value around 2 × 10-8.

AB - CO2 sequestrated in deep geological formations can be in gaseous, supercritical or liquid state, depending on subsurface pressure and temperature. In this work, CO2 core flooding experiments were carried out to investigate the effect of CO2 phase on drainage process, especially parameters, such as capillary displacement pressure, relative permeability and displacement efficiency. The results indicated that CO2 phase significantly affected its breakthrough. The breakthrough took place with the least volume of injected liquid CO2 (LCO2) and with the largest volume of injected gas CO2 (gCO2). The capillary displacement pressure was measured based on the jump in the pressure profile and it showed the largest jump in gCO2 drainage. The relative permeability was the largest in LCO2-water displacement and the smallest in gCO2-water displacement. The displacement efficiency can be improved by increasing capillary number when it was smaller than a critical value around 2 × 10-8.

KW - CO2 phase

KW - CO2 breakthrough time

KW - Capillary displacement pressure

KW - Relative permeability

KW - Water recovery

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