Characterization and Prediction of the Gas Hydrate Reservoir at the Second Offshore Gas Production Test Site in the Eastern Nankai Trough, Japan

Machiko Tamaki, Tetsuya Fujii and Kiyofumi Suzuki
Additional contact information
Machiko Tamaki: Japan Oil Engineering Co., Ltd. (JOE), Kachidoki Sun-Square 1-7-3, Kachidoki, Chuo-ku, Tokyo 104-0054, Japan
Tetsuya Fujii: Japan Oil, Gas and Metals National Corporation (JOGMEC), 1-2-2 Hamada Mihama-ku, Chiba-shi, Chiba 261-0025, Japan
Kiyofumi Suzuki: Japan Oil, Gas and Metals National Corporation (JOGMEC), 1-2-2 Hamada Mihama-ku, Chiba-shi, Chiba 261-0025, Japan

Energies, 2017, vol. 10, issue 10, 1-13

Abstract: Following the world’s first offshore production test that was conducted from a gas hydrate reservoir by a depressurization technique in 2013, the second offshore production test has been planned in the eastern Nankai Trough. In 2016, the drilling survey was performed ahead of the production test, and logging data that covers the reservoir interval were newly obtained from three wells around the test site: one well for geological survey, and two wells for monitoring surveys, during the production test. The formation evaluation using the well log data suggested that our target reservoir has a more significant heterogeneity in the gas hydrate saturation distribution than we expected, although lateral continuity of sand layers is relatively good. To evaluate the spatial distribution of gas hydrate, the integration analysis using well and seismic data was performed. The seismic amplitude analysis supports the lateral reservoir heterogeneity that has a significant positive correlation with the resistivity log data at the well locations. The spatial distribution of the apparent low-resistivity interval within the reservoir observed from log data was investigated by the P-velocity volume derived from seismic inversion. The integrated results were utilized for the pre-drill prediction of the reservoir quality at the producing wells. These approaches will reduce the risk of future commercial production from the gas hydrate reservoir.

Keywords: gas hydrate; reservoir heterogeneity; integration analysis; resistivity log; seismic amplitude; seismic inversion; P-velocity; second offshore production test; eastern Nankai Trough (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (14)

Downloads: (external link)
https://www.mdpi.com/1996-1073/10/10/1678/pdf (application/pdf)
https://www.mdpi.com/1996-1073/10/10/1678/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:10:y:2017:i:10:p:1678-:d:116009

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().