Experimental study on seismic response during CO 2 sequestration with different phase state

Chen, Hao; Yang, Shenglai; Xue, Zheng; Wang, Zhilin; Lv, Sanbo; Hu, Wei; Lu, Hao; Qiu, Zhipeng

doi:10.1016/j.joei.2015.01.012

Cited by 3 publications

(2 citation statements)

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“…Bello et al investigated the role of CO 2 foam EOR in the reduction in carbon emissions and suggested that the approach of generating CO 2 foams can boost financial incentives, help to lower carbon emissions, and produce the crude oil in a more sustainable way [7]. Depleted oil reservoirs offer significant advantages over other CO 2 storage sites, such as aquifers and deep oceans, due to lower capital costs and more economic incentives from oil production [8][9][10][11]. Furthermore, CO 2 -EOR techniques have been utilized for approximately half a century in the oil industry [12,13], resulting in more comprehensive investigations of the processes of using CO 2 -EOR techniques for CO 2 storage in depleted oil reservoirs than those in other sites [14,15].…”

Section: Introductionmentioning

confidence: 99%

A Novel Multi-Phase Strategy for Optimizing CO2 Utilization and Storage in an Oil Reservoir

et al. 2023

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In this paper, an innovative multi-phase strategy is developed and numerically tested to optimize CO2 utilization and storage in an oil reservoir to support low carbon transition. In the first phase, the water-alternating-gas (WAG) injection is conducted to simultaneously store CO2 and produce crude oil in the reservoir from the respective injection and production wells. In the second phase, the injection and production wells are both shut in for some time to allow CO2 and water to be stratigraphically separated. In the third phase, CO2 is injected from the upper part of the reservoir above the separated water layer to displace water downwards, while fluids continue to be produced in the water-dominated zone from the lower part of the production well. Lastly, the production well is finally shut in when the produced gas–water ratio (GWR) reaches 95%, but CO2 injection is kept until the reservoir pressure is close to the fracture pressure of its caprocks. The numerical simulations show that implementing the proposed multi-phase strategy doubles CO2 storage in comparison to applying the WAG injection alone. In particular, 80% of the increased CO2 is stored in the third phase due to the optimized perforation. In addition, the CO2 injection rate in the last phase does not appear to affect the amount of CO2 storage, while a higher CO2 injection rate can reduce the CO2 injection time and accelerate the CO2 storage process. In the proposed strategy, we assume that the geothermal energy resources from the produced fluids can be utilized to offset some energy needs for the operation. The analysis of energy gain and consumption from the simulation found that at the early stage of the CO2-WAG phase, the energy gain mostly comes from the produced oil. At the late stage of the CO2-WAG phase and the subsequent phases, there is very little or even no energy gain from the produced oil. However, the geothermal energy of the produced water and CO2 substantially compensate for the energy loss due to decreasing oil production. As a result, a net energy gain can be achieved from the proposed multi-phase strategy when geothermal energy extraction is incorporated. The new multi-phase strategy and numerical simulation provide insights for practical energy transition and CO2 storage by converting a “to be depleted” oil reservoir to a CO2 storage site and a geothermal energy producer while enhancing oil recovery.

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Section: Introductionmentioning

confidence: 99%

A Novel Multi-Phase Strategy for Optimizing CO2 Utilization and Storage in an Oil Reservoir

et al. 2023

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“…CO 2 , which is also known as a greenhouse gas, − has a serious impact on the global environment. , Since the 1990s, many studies have suggested that the CO 2 concentration in the atmosphere may rise from 0.028–0.035% in 1994 to 0.05% in 2050 as a predicted value, , thereby accelerating the effects of global warming. ,, These scenarios indicate the urgent need to reduce the atmospheric concentration of CO 2 . Storing CO 2 underground through a geological formation is regarded as an effective and safe method for industry-derived CO 2 . − Previous numerical simulations and field tests have already demonstrated that the formation with fossil fuel, as an ideal site, is often used for the geological sequestration of CO 2 , which can substantially improve oil production and considerably reduce the CO 2 concentration in air by the oil displaced. , This phenomenon is attributed to the tight caprock at the top of an oil-bearing formation, which can prevent the hydrocarbon migration.…”

Section: Introductionmentioning

confidence: 99%

Oil Recovery Performance and CO₂ Storage Potential of CO₂ Water-Alternating-Gas Injection after Continuous CO₂ Injection in a Multilayer Formation

Yang

et al. 2016

Energy Fuels

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In this study, oil recovery performance and carbon dioxide (CO 2 ) storage potential of a CO 2 water-alternating-gas (CO 2 -WAG) injection after continuous CO 2 injection process for multilayer formation were experimentally determined under immiscible and miscible conditions. First, a slim-tube apparatus was used to measure the minimum miscibility pressure (MMP) of a CO 2 −crude oil system (MMP = 22.79 MPa), which was applied as a guide for follow-on investigations. Afterward, the CO 2 -WAG injection after the continuous CO 2 injection for a triple-layer system, horizontally placed and parallel-connected, was conducted to evaluate the capacity of enhanced oil recovery and CO 2 storage potential of the multilayer formation at different operating pressures and a reservoir temperature of 98 °C. Results revealed that the oil recovery of the entire system was determined by the recovery of a layer with the highest permeability, which was more than 90% of the entire system recovery provided by the highest permeability layer in the continuous CO 2 injection. The ensuing CO 2 -WAG injection could further enhance the oil recovery of the system after the continuous CO 2 injection. The contribution of the recovery produced by the highest permeability from 90 to 98.3% could also be reduced for the entire system recovery. The oil recovery factor of the multilayer system increased as the operating pressure increased (i.e., from 33.01% of the system at P op = 15 MPa to 39.42% of the system at P op = 25 MPa). From a view of CO 2 storage potential, the ensuing CO 2 -WAG injection at immiscible and miscible conditions could also double the amount of stored CO 2 after the continuous CO 2 injection for the multilayer system. More than 75−80% of stored CO 2 for the multilayer system was contributed by the highest permeability layer at the end of the CO 2 -WAG the CO 2 -WAG injection after the continuous CO 2 injection process under immiscible and miscible conditions. Therefore, for a multilayer formation, such as the Jilin oilfield, the layer with medium and low permeability should be further developed after CO 2 -WAG injection.

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Determination of dynamic elastic properties of dry, wet and partially CO2 saturated coals from laboratory scale ultrasonic response

Mukherjee

Misra

Raja

2020

International Journal of Greenhouse Gas Control

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Experimental study on seismic response during CO 2 sequestration with different phase state

Cited by 3 publications

References 24 publications

A Novel Multi-Phase Strategy for Optimizing CO2 Utilization and Storage in an Oil Reservoir

A Novel Multi-Phase Strategy for Optimizing CO2 Utilization and Storage in an Oil Reservoir

Oil Recovery Performance and CO₂ Storage Potential of CO₂ Water-Alternating-Gas Injection after Continuous CO₂ Injection in a Multilayer Formation

Determination of dynamic elastic properties of dry, wet and partially CO2 saturated coals from laboratory scale ultrasonic response

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Experimental study on seismic response during CO 2 sequestration with different phase state

Cited by 3 publications

References 24 publications

A Novel Multi-Phase Strategy for Optimizing CO2 Utilization and Storage in an Oil Reservoir

A Novel Multi-Phase Strategy for Optimizing CO2 Utilization and Storage in an Oil Reservoir

Oil Recovery Performance and CO2 Storage Potential of CO2 Water-Alternating-Gas Injection after Continuous CO2 Injection in a Multilayer Formation

Determination of dynamic elastic properties of dry, wet and partially CO2 saturated coals from laboratory scale ultrasonic response

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Oil Recovery Performance and CO₂ Storage Potential of CO₂ Water-Alternating-Gas Injection after Continuous CO₂ Injection in a Multilayer Formation