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Assessing the combined influence of fluid-rock interactions on reservoir properties and injectivity during CO2 storage in saline aquifers

Journal Article · · Energy
 [1];  [1];  [2];  [3];  [1];  [1]
  1. China Univ. of Petroleum, Qingdao (China). School of Petroleum Engineering
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Mechanical Engineering
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Complex fluid-rock interactions can occur during the injection of carbon dioxide (CO2) into saline aquifers for sequestration, which may affect CO2 injectivity and storage capacity. A comprehensive reactive transport model is established to analyze salt precipitation, CO2-water-rock geochemical reactions, and their effects on reservoir physical properties and injectivity. In addition, sensitivity analyses are conducted to investigate the main factors that affect fluid-rock interactions and injectivity with relevance for site selection for CO2 storage. Results show that the back flow of formation water not only affects the salt precipitation but also affects the CO2-water-rock geochemical reactions, resulting in salt and calcite precipitations mainly occurring in the dry-out zone. However, most of the mineral dissolution/precipitation caused by CO2-water-rock reaction occurs in the two-phase and aqueous-phase zones, and their effect on reservoir porosity and permeability are small. A considerable amount of sodium chloride precipitates in the dry-out zone as brine is drawn by capillary action into this zone, with significant consequences for porosity, permeability and injectivity. The injection rate, salinity, capillary pressure–saturation relationships, and reservoir permeability strongly affect the distribution of salt precipitation. Finally, moderate injection rates, salinities, capillary pressures, and permeabilities all lead to favorable CO2 injectivity.
Research Organization:
China Univ. of Petroleum, Qingdao (China); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
Changjiang Scholars and Innovative Research (China); China Univ. of Petroleum (China); Fundamental Research Funds for the Central Universities (China); National Natural Science Foundation of China (NSFC); National Oil and Gas Major Projects (China); USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1479993
Alternate ID(s):
OSTI ID: 23079689
Report Number(s):
LA-UR--18-23944
Journal Information:
Energy, Journal Name: Energy Vol. 155; ISSN 0360-5442
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

Analytical Model for Leakage Detection in CO2 Sequestration in Deep Saline Aquifers: Application to ex Situ and in Situ CO2 Sequestration Processes journal December 2019
The coupled effect of salt precipitation and fines mobilization on CO 2 injectivity in sandstone: Original Research Article: The coupled effect of salt precipitation and mobilization of fines journal September 2018
Progress of the research on productivity prediction methods for stimulated reservoir volume (SRV)-fractured horizontal wells in unconventional hydrocarbon reservoirs journal March 2019
Comparison of analytical models for hydraulic fracture conductivity journal July 2019
Enhanced stability and high temperature-tolerance of CO 2 foam based on a long-chain viscoelastic surfactant for CO 2 foam flooding journal January 2019
Productivity Model for Water-Producing Gas Well in a Dipping Gas Reservoir With an Aquifer Considering Stress-Sensitive Effect journal November 2018
Analytical solution of Buckley-Leverett equation for gas flooding including the effect of miscibility with constant-pressure boundary journal February 2019

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