P-wave monitoring of hydrate-bearing sand during CH4–CO2 replacement

Espinoza, D. Nicolas; Santamarina, J. Carlos

doi:10.1016/j.ijggc.2011.02.006

Cited by 85 publications

(47 citation statements)

References 47 publications

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“…This suggests that the P-wave velocity obtained from logging and seismic surveys can be used to estimate the in situ hydrate saturation if the hydrate morphology in actual reservoirs is revealed. P-wave velocity changes during CH 4 eCO 2 replacement in hydrates have also been studied to estimate the sediment stiffness (Espinoza and Santamarina, 2011;Liu et al, 2013). It is therefore important to understand the relationship between the P-wave velocity, hydrate saturation, and hydrate morphology because these properties are deeply linked to the physical properties of hydrate-bearing sediments, such as their permeability, thermal properties, electrical conductivity, and shear strength (Waite et al, 2009;Santamarina and Ruppel, 2010).…”

Section: Introductionmentioning

confidence: 99%

Effect of methane hydrate morphology on compressional wave velocity of sandy sediments: Analysis of pressure cores obtained in the Eastern Nankai Trough

Konno

Jin

Yoneda

et al. 2015

Marine and Petroleum Geology

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Section: Introductionmentioning

confidence: 99%

Effect of methane hydrate morphology on compressional wave velocity of sandy sediments: Analysis of pressure cores obtained in the Eastern Nankai Trough

Konno

Jin

Yoneda

et al. 2015

Marine and Petroleum Geology

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“…13a) play important roles in certain GCS concepts, such as carbon sequestration in deep ocean sediments (House et al 2006;Tohidi et al 2010) and CO 2 -CH 4 substitution in natural methane hydrate formations Park et al 2006;Espinoza and Santamarina 2011). The potential usefulness of gas hydrates as a CO 2 storage medium is illustrated by the fact that the molecular CO 2 :H 2 O ratio in these hydrates can be as high as 1:5.75, about 300 times the solubility of CO 2 in water at ambient conditions.…”

Section: Co 2 Clathrate Hydratesmentioning

confidence: 99%

Molecular Simulation of CO2- and CO3-Brine-Mineral Systems

Hamm

Bourg

Wallace

et al. 2013

Reviews in Mineralogy and Geochemistry

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“…CH4, although relatively short-lived in the atmosphere (approximately 10 years), is a potent greenhouse gas that absorbs infrared radiation approximately 25 times more efficiently than CO2 [9]. Enhanced hydrate stability can be accommodated through CO2 exchange while benefitting from gas production and maintained structural integrity [10,11]. Other benefits are reduced seepage where CO2 hydrate itself becomes an additional sealing layer [12].…”

Section: Introductionmentioning

confidence: 99%

Transport Mechanisms for CO2-CH4 Exchange and Safe CO2 Storage in Hydrate-Bearing Sandstone

et al. 2015

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CO2 injection in hydrate-bearing sediments induces methane (CH4) production while benefitting from CO2 storage, as demonstrated in both core and field scale studies. CH4 hydrates have been formed repeatedly in partially water saturated Bentheim sandstones. Magnetic Resonance Imaging (MRI) and CH4 consumption from pump logs have been used to verify final CH4 hydrate saturation. Gas Chromatography (GC) in combination with a Mass Flow Meter was used to quantify CH4 recovery during CO2 injection. The overall aim has been to study the impact of CO2 in fractured and non-fractured samples to determine the performance of CO2-induced CH4 hydrate production. Previous efforts focused on diffusion-driven exchange from a fracture volume. This approach was limited by gas dilution, where free and produced CH4 reduced the CO2 concentration and subsequent driving force for both diffusion and exchange. This limitation was targeted by performing experiments where CO2 was injected continuously into the spacer volume to maintain a high driving force. To evaluate the effect of diffusion length multi-fractured core samples were used, which demonstrated that length was not the dominating effect on core scale. An additional set of experiments is presented on non-fractured samples, where diffusion-limited transportation was assisted by continuous CO2 injection and CH4 displacement. Loss of permeability was addressed through binary gas (N2/CO2) injection, which regained injectivity and sustained CO2-CH4 exchange. OPEN ACCESSEnergies 2015, 8 4074

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P-wave monitoring of hydrate-bearing sand during CH4–CO2 replacement

Cited by 85 publications

References 47 publications

Effect of methane hydrate morphology on compressional wave velocity of sandy sediments: Analysis of pressure cores obtained in the Eastern Nankai Trough

Effect of methane hydrate morphology on compressional wave velocity of sandy sediments: Analysis of pressure cores obtained in the Eastern Nankai Trough

Molecular Simulation of CO2- and CO3-Brine-Mineral Systems

Transport Mechanisms for CO2-CH4 Exchange and Safe CO2 Storage in Hydrate-Bearing Sandstone

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