Study of geological storage for a candidate CCS demonstration project in Tomakomai, Hokkaido, Japan

Yamanouchi, Yoshinori; Higashinaka, Motonori; Yoshii, Tôru; Todaka, Norifumi

doi:10.1016/j.egypro.2011.02.561

Cited by 9 publications

(3 citation statements)

References 3 publications

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“…The CO 2 source was offgas derived from a hydrogen production unit of an oil refinery located in the region. A high purity CO 2 (>99%) was recovered from the offgas by an amine scrubbing process and the gaseous CO 2 was compressed and then injected into two different offshore geological reservoirs (Yamanouchi et al, 2011;Sawada et al, 2018). The host reservoirs are the shallow Moebetsu Formation located at a depth of approximately 1000 m below the seabed and the deep Takinoue Formation with the depth of 2400 m. The former is a Lower Quaternary saline aquifer composed of 200 m thick sandstone, while the latter is a Miocene saline aquifer which consists of volcanic and volcaniclastic rocks with a thickness of 600 m. A schematic diagram of geological section is referred from Tanaka et al (2017) and reproduced in Supplementary Figure S1.…”

Section: Tomakomai Carbon Capture and Storage Demonstration Projectmentioning

confidence: 99%

Groundwater Anomaly Related to CCS-CO2 Injection and the 2018 Hokkaido Eastern Iburi Earthquake in Japan

et al. 2020

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Carbon capture and storage (CCS) is considered a key technology for reducing CO2 emissions into the atmosphere. Nonetheless, there are concerns that if injected CO2 migrates in the crust, it may trigger slip of pre-existing faults. In order to test if this is the case, covariations of carbon, hydrogen, and oxygen isotopes of groundwater measured from Uenae well, southern Hokkaido, Japan are reported. This well is located 13 km away from the injection point of the Tomakomai CCS project and 21 km from the epicenter of September 6th, 2018 Hokkaido Eastern Iburi earthquake (M 6.7). Carbon isotope composition was constant from June 2015 to February 2018, and decreased significantly from April 2018 to November 2019, while total dissolved inorganic carbon (TDIC) content showed a corresponding increase. A decrease in radiocarbon and δ13C values suggests aquifer contamination by anthropogenic carbon, which could possibly be attributable to CCS-injected CO2. If such is the case, the CO2 enriched fluid may have initially migrated through permeable channels, blocking the fluid flow from the source region, increasing pore pressure in the focal region and triggering the natural earthquake where the brittle crust is already critically stressed.

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Section: Tomakomai Carbon Capture and Storage Demonstration Projectmentioning

confidence: 99%

Groundwater Anomaly Related to CCS-CO2 Injection and the 2018 Hokkaido Eastern Iburi Earthquake in Japan

et al. 2020

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“…tuff (T-T), which are the principal reservoir rocks and the caprock overlaying them for a demonstration site of the CCS at Tomakomai, Hokkaido, Japan. The geological background and stratigraphy of Tomakomai site are described in detail by Yamanouchi et al (2011).…”

Section: Specimensmentioning

confidence: 99%

Evolution of Permeability during Fracturing Processes in Rocks under Conditions of Geological Storage of CO<sub>2</sub>

et al. 2015

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We investigated experimentally the change in permeability in three different types of soft rocks including mudstone, sandstone, and tuff from the Fureoi and Takinoue formations, which are representative of the CCS demonstration site at Tomakomai in Japan, and another type of mudstone from the Besho Fm. (B-M). Permeability during deformation, shear fracturing, and post-failure slipping is estimated from measured flow rate and differential pore pressure. In addition, the morphologies of the shear fracture zones were examined using the X-ray CT scanning technique. All the samples exhibit typical brittle-fracturing behaviors, except for the B-M sample which does not show a major shear fracture. During the fracturing process, the permeability increased by one to three orders of magnitude. Further changes in the post-failure slipping and stress relaxation regimes show strong dependence on the type of rocks. Observed changes in permeability can be interpreted as results of fracturing creation, shear zone smoothing, closure and reactivation of fractures under different stress regimes.

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“…However, it should be noted that for implementation of the CCS in Japan, Kazusa group is not considered as the demonstration site of the CCS such as the site of Tomakomai in Hokkaido. 12) Thus, for this study, the mudstone sample taken from here was used as a model rock for the assessment of hydraulic properties on a mudstone. Also, Kazusa group was chosen as representing a wide variation of porosity and having data accumulate on the geological information reported by many researchers e.g., Ito et al…”

Section: Geological Setting and Morphology Properties Ofmentioning

confidence: 99%

Impact of Effective Pressure on Threshold Pressure of Kazusa Group Mudstones for CO<sub>2</sub> Geological Sequestration

2015

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During carbon dioxide (CO 2 ) injection process, overpressure within targeted reservoirs might occur because of changes in stress related to the CO 2 pressure, which could lead to deformation of the surrounding rocks, including caprocks which are geological formations with low permeability overlying a CO 2 storage reservoir. The understanding for impact of effective pressure (i.e., the difference between confining pressure and pore pressure) on hydraulic parameters (i.e., threshold pressure and permeability) of such caprocks has a critical role in the safe implementation of CO 2 geological sequestration. The purpose of this study was to examine the hydraulic properties of mudstones, which were taken from Otadai (OTD), Ohara (OHR), and Namihana (NMH) formations of Kazusa group, depending on effective pressure at 40°C and effective pressures of the range from 120 MPa. Change in porosity as a function of effective pressure was also investigated in order to infer the critical pressure, which provided an insight into the relationship between threshold pressure and permeability. Our results demonstrated that with increasing effective pressure, OHR mudstone exhibited a steeply decreasing trend in permeability at around 5 MPa, whereas OTD and NMH mudstones exhibited a monotonous decrease. All data of threshold pressure as a function of effective pressure exhibited linear correlation with permeability data on a log-log scale, except for the OTD and OHR mudstones at below the inferred critical pressure. It was suggested that the relationship between threshold pressure and permeability depends strongly on changes in pore structures as a function of effective pressure for each mudstone tested. The results highlighted that the presence of microfractures could be critical in characterizing the hydraulic parameters of mudstones, and mudstones with crack-like pores and/or microfractures such as the OTD and OHR mudstones might be significantly more susceptible to decreasing threshold pressure compared with fracture-less structures under below the critical pressure condition. However, considering CO 2 injection process which means that CO 2 is injected into the targeted reservoirs within normal stress states, all the obtained data above the critical pressure could be explained fully by the linear correlation between threshold pressure and permeability, even if the mudstones incorporated microfractures.

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Study of geological storage for a candidate CCS demonstration project in Tomakomai, Hokkaido, Japan

Cited by 9 publications

References 3 publications

Groundwater Anomaly Related to CCS-CO2 Injection and the 2018 Hokkaido Eastern Iburi Earthquake in Japan

Groundwater Anomaly Related to CCS-CO2 Injection and the 2018 Hokkaido Eastern Iburi Earthquake in Japan

Evolution of Permeability during Fracturing Processes in Rocks under Conditions of Geological Storage of CO<sub>2</sub>

Impact of Effective Pressure on Threshold Pressure of Kazusa Group Mudstones for CO<sub>2</sub> Geological Sequestration

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