Site Characterization

Niemi, Auli; Edlmann, Katriona; Carrera, Jesús; Juhlin, Christopher; Tatomir, Alexandru; Ghergut, I.; Sauter, Martin; Bensabat, Jacob; Fagerlund, Fritjof; Cornet, François; Vilarrasa, Víctor; McDermott, Christopher

doi:10.1007/978-94-024-0996-3_7

Cited by 12 publications

(20 citation statements)

References 134 publications

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“…All depletion simulations are performed at an initial pressure of 24 MPa, at a constant temperature of 60°C, which represents a typical aquifer at an appropriate depth for CO 2 storage (Niemi et al., 2017). The ultimate pressure decline is set to 15 MPa for all simulations.…”

Section: Model Descriptionmentioning

confidence: 99%

Pore‐Scale Determination of Residual Gas Remobilization and Critical Saturation in Geological CO₂ Storage: A Pore‐Network Modeling Approach

Moghadasi

Foroughi

Basirat

et al. 2023

Water Resources Research

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Remobilization of residually trapped CO2 can occur under pressure depletion, caused by any sort of leakage, brine extraction for pressure maintenance purposes, or simply by near wellbore pressure dissipation once CO2 injection has ceased. This phenomenon affects the long‐term stability of CO2 residual trapping and should therefore be considered for an accurate assessment of CO2 storage security. In this study, pore‐network modeling is performed to understand the relevant physics of remobilization. Gas remobilization occurs at a higher gas saturation than the residual saturation, the so‐called critical saturation; the difference is called the mobilization saturation, a parameter that is a function of the network properties and the mechanisms involved. Regardless of the network type and properties, Ostwald ripening tends to slightly increase the mobilization saturation, thereby enhancing the security of residual trapping. Moreover, significant hysteresis and reduction in gas relative permeability is observed, implying slow reconnection of the trapped gas clusters. These observations are safety enhancing features, due to which the remobilization of residual CO2 is delayed. The results, consistent with our previous analysis of the field‐scale Heletz experiments, have important implications for underground gas and CO2 storage. In the context of CO2 storage, they provide important insights into the fate of residual trapping in both the short and long term.

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Section: Model Descriptionmentioning

confidence: 99%

Pore‐Scale Determination of Residual Gas Remobilization and Critical Saturation in Geological CO₂ Storage: A Pore‐Network Modeling Approach

Moghadasi

Foroughi

Basirat

et al. 2023

Water Resources Research

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“…Menurunnya indeks kualitas air di Yogyakarta Wong, Sungai Gadjah (Putro, 2017;Saraswati et al, 2019) juga dapat menjadi indikasi terjadinya pencemaran yang salah satu penyebab utamanya adalah pembuangan air limbah domestik tanpa diolah. Meskipun tidak menunjukkan relevansi secara langsung terhadap kondisi biotik di badan air, kadar COD dapat merepresentasikan tingginya pencemar organik di badan air (Niemi et al, 2006), sedangkan kadar nutrien yang tinggi di badan air dapat meningkatkan pertumbuhan fitoplankton yang dapat menyebabkan terjadinya algae bloom di perairan (Mahlil et al, 2018;Matthews, 2008) Dalam rangka pengendalian pencemaran air, Kementerian Lingkungan Hidup dan mengesahkan Peraturan Kehutanan (LHK) Menteri LHK No. 68 tahun 2016 tentang baku mutu air limbah yang mengatur batasan maksimal konsentrasi pencemar yang diijinkan untuk dibuang ke lingkungan.…”

Section: Pendahuluanunclassified

Stabilitas Performa Dan Realibilitas Ipal Domestik Dengan Kombinasi Aerasi Secara Intermittent Dengan Resirkulasi Efluen Dan Microbubble Generator

Ahmad¹,

Putri²,

Santoni³

et al. 2021

FROPIL (Forum Profesional Teknik Sipil)

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Berbagai macam teknologi telah diterapkan pada Instalasi Pengolahan Air Limbah (IPAL) domestik, namun tidak diketahui secara pasti realibitas dan kinerjanya. Penelitian ini membahas tentang realibilitas IPAL di Bulaksumur Residence untuk pemenuhan standar kualitas efluen jika efluen akan dibuang langsung ke lingkungan dan standar kualitas air kelas 4 jika efluen IPAL akan digunakan sebagai air penyiraman taman. IPAL beroperasi secara kontinyu dan kinerja IPAL diamati selama 82 hari. IPAL menggunakan sistem aerasi intermittent dengan memanfaatkan resirkulasi air limbah dengan pemasangan microbubble generator menunjukkan performa yang baik dan stabil. Efisiensi removal TSS, COD, PO4-P dan TN berturut-turut sebesar 68,9±12,9%, 78,4±9,8%, 45,3±8,6% dan 63,4±13,7%. Performa yang sangat baik juga terlihat pada efisiensi nitritasi, nitratasi dan denitrifikasi berturut-turut sebesar 83,1±7,9%, 97,6±2,0% dan 67,2±19,3%. Kualitas efluen untuk parameter TSS (4,6±3,4 mg/l), COD (13,9±6,6 mg/l) dan NH3-N (2,4±2,4 mg/l) menunjukkan realitibitas 100% baik untuk memenuhi standar kualitas air efluen maupun air kelas 4. Begitu pula untuk NO3-N (2,8±0,5 mg/l) juga menunjukkan realibilitas 100% untuk memenuhi standar kualitas air kelas 4. Sedangkan untuk NH3-N (2,4±2,4 mg/l) dan NO2-N (0,22±0,99) hanya menunjukkan realibilitas sebesar masing-masing 8,3%.

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“…But the overall response of caprocks depends on the rock type. While certain caprocks undergo permeability increase due to interaction with CO 2 (Olabode and Radonjic, 2014), others present a self-sealing response to CO 2 flow due to porosity decrease (Espinoza and Santamarina, 2012) or fracture clogging (Noiriel et al, 2007). Nevertheless, CO 2 is only expected to penetrate a short distance, if any, into the caprock because of its high entry pressure, which prevents upwards CO 2 flow (Busch et al, 2008).…”

Section: Geochemical Effects On Geomechanical Propertiesmentioning

confidence: 99%

Induced seismicity in geologic carbon storage

et al. 2019

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Abstract. Geologic carbon storage, as well as other geo-energy applications, such as geothermal energy, seasonal natural gas storage and subsurface energy storage imply fluid injection and/or extraction that causes changes in rock stress field and may induce (micro)seismicity. If felt, seismicity has a negative effect on public perception and may jeopardize wellbore stability and damage infrastructure. Thus, induced earthquakes should be minimized to successfully deploy geo-energies. However, numerous processes may trigger induced seismicity, which contribute to making it complex and translates into a limited forecast ability of current predictive models. We review the triggering mechanisms of induced seismicity. Specifically, we analyze (1) the impact of pore pressure evolution and the effect that properties of the injected fluid have on fracture and/or fault stability; (2) non-isothermal effects caused by the fact that the injected fluid usually reaches the injection formation at a lower temperature than that of the rock, inducing rock contraction, thermal stress reduction and stress redistribution around the cooled region; (3) local stress changes induced when low-permeability faults cross the injection formation, which may reduce their stability and eventually cause fault reactivation; (4) stress transfer caused by seismic or aseismic slip; and (5) geochemical effects, which may be especially relevant in carbonate-containing formations. We also review characterization techniques developed by the authors to reduce the uncertainty in rock properties and subsurface heterogeneity both for the screening of injection sites and for the operation of projects. Based on the review, we propose a methodology based on proper site characterization, monitoring and pressure management to minimize induced seismicity.

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Site Characterization

Cited by 12 publications

References 134 publications

Pore‐Scale Determination of Residual Gas Remobilization and Critical Saturation in Geological CO₂ Storage: A Pore‐Network Modeling Approach

Pore‐Scale Determination of Residual Gas Remobilization and Critical Saturation in Geological CO₂ Storage: A Pore‐Network Modeling Approach

Stabilitas Performa Dan Realibilitas Ipal Domestik Dengan Kombinasi Aerasi Secara Intermittent Dengan Resirkulasi Efluen Dan Microbubble Generator

Induced seismicity in geologic carbon storage

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Site Characterization

Cited by 12 publications

References 134 publications

Pore‐Scale Determination of Residual Gas Remobilization and Critical Saturation in Geological CO2 Storage: A Pore‐Network Modeling Approach

Pore‐Scale Determination of Residual Gas Remobilization and Critical Saturation in Geological CO2 Storage: A Pore‐Network Modeling Approach

Stabilitas Performa Dan Realibilitas Ipal Domestik Dengan Kombinasi Aerasi Secara Intermittent Dengan Resirkulasi Efluen Dan Microbubble Generator

Induced seismicity in geologic carbon storage

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Product

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Pore‐Scale Determination of Residual Gas Remobilization and Critical Saturation in Geological CO₂ Storage: A Pore‐Network Modeling Approach

Pore‐Scale Determination of Residual Gas Remobilization and Critical Saturation in Geological CO₂ Storage: A Pore‐Network Modeling Approach