|
|
CO2 Storage Mechanism in Deep Saline Aquifers |
LI Haiyan, PENG Shimi, XU Mingyang, LUO Chao, GAO Yang |
College of Geosciences,China University of Petroleum, Beijing 102249, China |
|
|
Abstract: The storage of CO2 into saline aquifers is the best way to mitigate the green house effect. The storage of CO2 in deep saline aquifers mainly concerns the water storage, the residual gas storage, the dissolved storage and the mineral storage. The hydrodynamic trap is formed by the upward movement of CO2 to dense layers, which is trapped and aggregated in the geological body. The hydrodynamic traps include the open and the enclosed traps. The advantage of an enclosed trap is that the migration of CO2 is confined both horizontally and vertically, and the disadvantage is that the dissolution is restricted by the limited gas-water contact area. The advantage of an open trap is the significant quantity of CO2 dissolution caused by a large area of gas-water contact, and the disadvantage is the need of fine characterization of a large area to determine the possible gas leakage path and the need of regional monitoring. Due to the lag of the displacement and sucking phase permeability, a part of CO2 is stored as the residual gas to form the residual gas trap. The CO2 dissolved in water reacts with the ions of calcium, magnesium and iron, to generate carbonate minerals, and to form the dissolved storage. The mineral storage formed by the slow chemical reactions between CO2 and reservoirs rocks would generate carbonate minerals or bicarbonate ions. With different storage durations, the various storage methods play different roles, and the storage security levels also vary. The study of the storage mechanism of CO2 in saline aquifers will provide some guidance for China's CO2 sequestration project.
|
Received: 09 October 2012
|
|
|
|
|
[1] |
ZHANG Jiangjiang, LIU Jining, GAO Qiuying, YANG Dongming, ZANG Hanyu, ZHANG Tao, XIAO Wenwen, JIANG Rui. Sediment in the Formation in Wet CO2 Environment of Pipeline and Quantitative Study of Its Corrosion Effect[J]. Science & Technology Review, 2014, 32(32): 67-71. |
[2] |
SONG Bo, TIAN Yuansi, WANG Xiaopo, LIU Zhigang. Viscosity Molding of CO2/HCs Fluid Mixtures in Wide Thermodynamic Ranges[J]. journal1, 2014, 32(27): 19-22. |
[3] |
TONG Yuxin, CHENG Ruifeng, WANG Jun, XIN Min, YANG Qichang. Effect Factors and Control Strategies for Improving Enriched CO2 Utilization Efficiency in Protected Agriculture[J]. journal1, 2014, 32(10): 47-52. |
[4] |
TONG Yuxin, CHENG Ruifeng, XIN Min, WANG Jun, YANG Qichang. Zero CO2 Concentration Difference and Enhanced Air Current Speed Method for Tomato Plant Greenhouse[J]. journal1, 2014, 32(10): 53-56. |
[5] |
LÜ Guangzhong, LI Zhenquan, LI Xiangliang, ZHANG Jian, WANG Shijie. Technology and Application of CO2 Capture, Utilization and Storage for Coal?fired Power Plant[J]. journal1, 2014, 32(1): 40-45. |
[6] |
WANG Jie;TAN Baoguo;LÜGuangzhong. Numerical Simulation for Division of Phase Zone Displacement: with Gao89 as an example[J]. , 2013, 31(9): 46-49. |
|
|
|
|