METHOD FOR MONITORING UNDERGROUND CO STORAGE Russian patent published in 2023 - IPC E21B41/00 E21B47/00 B65G5/00 

FIELD: carbon dioxide monitoring; carbon dioxide recycling.

SUBSTANCE: invention relates to monitoring underground carbon dioxide storage facilities and can be used in the technology of recycling carbon dioxide when it is placed in geological (underground) formations. A method for monitoring an underground carbon dioxide storage facility is claimed, in which the following is carried out: obtaining the initial hydrodynamic and geomechanical models of the monitoring zone of the underground carbon dioxide storage facility, monitoring the underground storage facility before the injection of carbon dioxide into the underground storage facility, updating the initial hydrodynamic and geomechanical models, monitoring the underground storage facility during the injection of carbon dioxide gas into underground storage and updating hydrodynamic and geomechanical models. In this case, monitoring includes: taking at least one deep sample of formation water in the monitoring zone and subsequent determination of the concentration of chemical substances in the selected sample; measurement of reservoir pressure in the zone of carbon dioxide injection in the well; measuring pressure in the overlying layers above the underground storage facility and in the underground storage facility; carrying out three-dimensional seismic survey of the monitoring area; conducting neutron logging of at least one well in the monitoring area; carrying out thickness measurements of at least one production string of the well in the monitoring zone; collecting at least one sample of near-surface or soil gases in the monitoring area and subsequent determination of the concentration of chemicals in the selected sample; carrying out downhole temperature measurements at least two depths in the monitoring zone; carrying out pressure testing of the trunk of at least one well in the monitoring zone; carrying out seismic monitoring of the monitoring area; conducting microseismic monitoring of the monitoring area.

EFFECT: increase in the efficiency of monitoring an underground carbon dioxide storage facility while ensuring comprehensive control over the risks of leakage and migration of carbon dioxide during its long-term storage in an underground storage facility, as well as increase in the accuracy of control of all presented risks.

16 cl, 8 dwg