Results of CO2 Storage Efficiency in Deep Saline Formations – Stage 2

2019 ◽  
Author(s):  
Lawrence Pekot ◽  
Scott Ayash ◽  
Jun Ge ◽  
Tao Jiang ◽  
Lonny Jacobson ◽  
...  
Keyword(s):  
Co2 Storage ◽  
Storage Efficiency

Impact of injected water salinity on CO2 storage efficiency in homogenous reservoirs

2018 ◽  
Vol 58 (1) ◽  
pp. 44 ◽  
Author(s):  
Emad A. Al-Khdheeawi ◽  
Stephanie Vialle ◽  
Ahmed Barifcani ◽  
Mohammad Sarmadivaleh ◽  
Stefan Iglauer
Keyword(s):  
Co2 Storage ◽  
Water Injection ◽  
Water Salinity ◽  
Co2 Injection ◽  
Storage Efficiency ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Salinity Water ◽  
Low Salinity Water Injection ◽  
Wag Injection

Water alternating gas (WAG) injection significantly improves enhanced oil recovery efficiency by improving the sweep efficiency. However, the impact of injected water salinity during WAG injection on CO2 storage efficiency has not been previously demonstrated. Thus, a 3D reservoir model has been developed for simulating CO2 injection and storage processes in homogeneous reservoirs with different water injection scenarios (i.e. low salinity water injection (1000 ppm NaCl), high salinity water injection (250 000 ppm NaCl) and no water injection), and the associated reservoir-scale CO2 plume dynamics and CO2 dissolution have been predicted. Furthermore, in this work, we have investigated the efficiency of dissolution trapping with and without WAG injection. For all water injection scenarios, 5000 kton of CO2 were injected during a 10-year CO2 injection period. For high and low salinity water injection scenarios, 5 cycles of CO2 injection (each cycle is one year) at a rate of 1000 kton/year were carried out, and each CO2 cycle was followed by a one year water injection at a rate of 0.015 pore volume per year. This injection period was followed by a 500-year post injection (storage) period. Our results clearly indicate that injected water salinity has a significant impact on the quantity of dissolved CO2 and on the CO2 plume dynamics. The low salinity water injection resulted in the maximum CO2 dissolution and minimum vertical migration of CO2. Also, our results show that WAG injection enhances dissolution trapping and reduces CO2 leakage risk for both injected water salinities. Thus, we conclude that the low salinity water injection improves CO2 storage efficiency.

scholarly journals Effect of Geologic Depositional Environment on CO2 Storage Efficiency

2014 ◽  
Vol 63 ◽  
pp. 5247-5257 ◽  
Author(s):  
Roland Okwen ◽  
Fang Yang ◽  
Scott Frailey
Keyword(s):  
Depositional Environment ◽  
Co2 Storage ◽  
Storage Efficiency

Quantifying the effects of depositional environment on deep saline formation co2 storage efficiency and rate

2018 ◽  
Vol 69 ◽  
pp. 8-19 ◽  
Author(s):  
Nicholas W. Bosshart ◽  
Nicholas A. Azzolina ◽  
Scott C. Ayash ◽  
Wesley D. Peck ◽  
Charles D. Gorecki ◽  
...  
Keyword(s):  
Depositional Environment ◽  
Co2 Storage ◽  
Storage Efficiency ◽  
Saline Formation
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