Multi-lateral horizontal well with dual-tubing system to improve CO2 storage security and reduce CCS cost

Kim, Min; Kwon, Seoyoon; Ji, Minsoo; Shin, Hyundon; Min, Baehyun

doi:10.1016/j.apenergy.2022.120368

Cited by 9 publications

(4 citation statements)

References 31 publications

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“…By incorporating robust geomechanical analyses, we can optimize the surveillance of CO 2 sequestration sites, thereby enhancing the fidelity of monitoring systems and maintaining the integrity of long-term carbon storage solutions. This, in turn, can support the exploration of alternatives, such as drilling new wells to produce brine, to relieve the pressure buildup associated with such surface events [46,47]. The technical evidence to be explored in this study will also provide new insights into the magnitude of geomechanical events and their occurrence timeframe, supporting the application of several ground deformation monitoring tools for GCS.…”

Section: Introductionmentioning

confidence: 66%

Unveiling Valuable Geomechanical Monitoring Insights: Exploring Ground Deformation in Geological Carbon Storage

Seabra,

Barbosa Machado,

Delshad

et al. 2024

Applied Sciences

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Geological Carbon Storage (GCS) involves storing CO2 emissions in geological formations, where safe containment is challenged by structural and stratigraphic trapping and caprock integrity. This study investigates flow and geomechanical responses to CO2 injection based on a Brazilian offshore reservoir model, highlighting the critical interplay between rock properties, injection rates, pressure changes, and ground displacements. The findings indicate centimeter-scale ground uplift and question the conventional selection of the wellhead as a monitoring site, as it might not be optimal due to the reservoir’s complexity and the nature of the injection process. This study addresses the importance of comprehensive sensitivity analyses on geomechanical properties and injection rates for advancing GCS by improving monitoring strategies and risk management. Furthermore, this study explores the geomechanical effects of modeling flow in the caprock, highlighting the role of pressure dissipation within the caprock. These insights are vital for advancing the design of monitoring strategies, enhancing the predictive accuracy of models, and effectively managing geomechanical risks, thus ensuring the success of GCS initiatives.

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Section: Introductionmentioning

confidence: 66%

Unveiling Valuable Geomechanical Monitoring Insights: Exploring Ground Deformation in Geological Carbon Storage

Seabra,

Barbosa Machado,

Delshad

et al. 2024

Applied Sciences

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“…However, the effectiveness of the radial boreholes CO 2 EOR method in developing shale oil reservoirs remains to be verified. Reservoir numerical simulation methods have long been used to predict the flow dynamics of crude oil during CO 2 EOR and the subsurface storage dynamics of CO 2 [34,35], and are capable of analyzing a variety of wellbore configurations, including multi-lateral and fishbone wells [36,37]. Leveraging these research methodologies could enable the effective analysis of the dynamics of CO 2 EOR using radial boreholes.…”

Section: Introductionmentioning

confidence: 99%

CO2-Enhanced Radial Borehole Development of Shale Oil: Production Simulation and Parameter Analysis

Dai,

Tian,

Xue

et al. 2024

Processes

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Shale oil resources, noted for their broad distribution and significant reserves, are increasingly recognized as vital supplements to traditional oil resources. In response to the high fracturing costs and swift decline in productivity associated with shale oil horizontal wells, this research introduces a novel approach utilizing CO2 for enhanced shale oil recovery in radial boreholes. A compositional numerical simulation method is built accounted for component diffusion, adsorption, and non-Darcy flow, to explore the viability of this technique. The study examines how different factors—such as initial reservoir pressure, permeability, numbers of radial boreholes, and their branching patterns—influence oil production and CO2 storage. Our principal conclusions indicate that with a constant CO2 injection rate, lower initial reservoir pressures predominantly lead to immiscible oil displacement, hastening the occurrence of CO2 gas channeling. Therefore, maintaining higher initial or injection pressures is critical for effective miscible displacement in CO2-enhanced recovery using radial boreholes. Notably, the adsorption of CO2 in shale oil results in the displacement of lighter hydrocarbons, an effect amplified by competitive adsorption. While CO2 diffusion tends to prompt earlier gas channeling, its migration towards areas of lower concentration within the reservoir reduces the extent of channeling CO2. Nonetheless, when reservoir permeability falls below 0.01 mD, the yield from CO2-enhanced recovery using radial boreholes is markedly low. Hence, selecting high-permeability “sweet spot” regions within shale oil reservoirs for the deployment of this method is advisable. To boost oil production, utilizing longer and broader radial boreholes, increasing the number of boreholes, or setting the phase angle to 0° are effective strategies. Finally, by comparing the production of shale oil enhanced by CO2 with that of a dual horizontal well fracturing system enhanced by CO2, it was found that although the former’s oil production is only 50.6% of the latter, its cost is merely 11.1%, thereby proving its economic viability. These findings present a new perspective for the economically efficient extraction of shale oil, offering potential guidance for industrial practices.

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“…• Consideration of impurities and free water content in CO 2 stream injected; • Modeling the dry-out effect due to water vaporization with CO 2 injection or another injectivity issue, which can be found in Machado et al [22]; • CO 2 leakage through wells with poor cement jobs, as pointed out by Gholami et al [23], can be the most important reason behind the migration and leakage; • Drilling design planning and stability concerns for horizontal well construction; • Investigation of solutions with horizontal branches to inject CO 2 and produce brine to relieve pressure buildup [24,25];…”

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confidence: 99%

“…This combination allows setting an optimum horizontal well length to enhance the CO 2 entrapment and to control the rise of the CO 2 plume, preventing its contact with the caprock and mitigating the associated risks. In this case, the optimum considering both purposes was L w = 2000 m, which is technically possible according to actual CCS field projects [18,25].…”

mentioning

confidence: 99%

Potential Benefits of Horizontal Wells for CO2 Injection to Enhance Storage Security and Reduce Leakage Risks

Machado,

Delshad,

Sepehrnoori

2023

Applied Sciences

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This study used numerical simulations of CO2 storage to identify the benefits of horizontal wells for geological carbon storage, such as enhancing CO2 trapped in porous media due to relative permeability and capillary hysteresis. Two injection schemes were tested: one using a vertical injector and the other employing a horizontal well. The results revealed two main findings. Firstly, the horizontal injection well effectively prevented or minimized CO2 penetration into the caprock across various sensitivity scenarios and over a thousand years of CO2 redistribution. Secondly, horizontal wells provided a safe approach to trapping CO2, increasing its entrapment as a residual phase by up to 19% within the storage site. This, in turn, reduced or prevented any unexpected events associated with CO2 leakage through the caprock. Additionally, the paper proposes a practical method for designing the optimal length of a horizontal well. This method considers a combination of two parameters: the additional CO2 that can be trapped using a horizontal well and the gravity number. In the case of the reservoir model of this study, a horizontal branch with a length of 2000 m was found to be the most effective design in enhancing CO2 entrapment and reducing CO2 buoyancy.

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Multi-lateral horizontal well with dual-tubing system to improve CO2 storage security and reduce CCS cost

Cited by 9 publications

References 31 publications

Unveiling Valuable Geomechanical Monitoring Insights: Exploring Ground Deformation in Geological Carbon Storage

Unveiling Valuable Geomechanical Monitoring Insights: Exploring Ground Deformation in Geological Carbon Storage

CO2-Enhanced Radial Borehole Development of Shale Oil: Production Simulation and Parameter Analysis

Potential Benefits of Horizontal Wells for CO2 Injection to Enhance Storage Security and Reduce Leakage Risks

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