Chikyu IODP Board and CDEX Operations - Scripps Institution of Oceanography, La Jolla, CA
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Chikyu IODP Board and
CDEX Operations
SEP Meeting
8-10 January 2019
Scripps Institution of Oceanography,
La Jolla, CA
CDEX/JAMSTEC Nobu Eguchi
CDEX/JAMSTEC Status JAMSTEC/CDEX carried out a successful IODP expedition, Exp. 380 (w/ onboard WS) in JFY 2017. JAMSTEC/CDEX is continuing our maximum efforts in making budget for future IODP expeditions. Scientific and social impacts have been the most important criteria of executing IODP expeditions. CDEX really appreciated for the ECORD contribution as a Chikyu member. Complementary Project Proposals (CPP) and new Chikyu members are more than welcome to accelerate the execution of future IODP expeditions. LHR project has been postponed, due to Australian financial aspect. Keep close communication/collaboration with Geoscience Australia regarding this project. JAMSTEC new mid-term program will start from April 2019, with significant organizational change.
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Chikyu Mid-Term Plan
JFY 4 5 6 7 8 9 10 11 12 2015/1 2015/2 2015/3
NGHP-02
2014 Japan R&M SIP R&M
@India
4 5 6 7 8 9 10 11 12 2016/1 2016/2 2016/3
Nan
2015 NGHP-02@India Regulatory Shipyard Maintenance SIP Tro
C10
4 5 6 7 8 9 10 11 12 2017/1 2017/2 2017/3
Exp.365
Exp.370
2016 NanTro Japan R&M SIP R&M
C10
T-Limit
4 5 6 7 8 9 10 11 12 2018/1 2018/2 2018/3
Exp. 380
IODP Oman
SCORE
Shipyard NanTroC6
2017 Japan R&M R&M
Maintenance Work
shop
4 5 6 7 8 9 10 11 12 2019/1 2019/2 2019/3
2018 IODP Oman 2
End of Japan Exp.358 NanTro C2
Mid-Term Regulatory Maintenance, R&M
4 5 6 7 8 9 10 11 12 2020/1 2020/2 2020/3
Regulatory
2019 Commercial Operation Window Shipyard
Maintenance
4 5 6 7 8 9 10 11 12 2021/1 2021/2 2021/3
2020 Regulatory Shipyard Maintenance IODP Expedition Window
=Commercial Operation
SIP: Cross-ministerial Strategic Innovation Promotion Program
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Outlook of Chikyu Operation JPFY2018
4 5 6 7 8 9 10 11 12 2019/1 2019/2 2019/3
ICDP Oman 2
Exp. 358
2018 Japan
NanTro C2
Regulatory Maintenance, R&M
Japan (Commercial operation)
ICDP Oman drilling project Phase 2, core analysis onboard
Chikyu (5 July – 3 September, 2018）
IODP Exp. 358 (7 October, 2018 – 31 March, 2019)
NanTroSEIZE Deep Riser Drilling:
Loading: 7 – 9 October, Leave port: 10 October, 2018
Arrive port: 21 March, 2019,
Core analysis onboard Chikyu : 22 – 31 March, 2019
Upcoming Chikyu IODP Expedition
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Exp. 358 NanTroSEIZE Plate Boundary Deep Riser 4
7 October 2018 – 31 March 2019
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Expedition 358 plans
and targets
w Using riser drilling, advance from
2922 to ~5300 mbsf across the
main reflector at the plate
boundary fault – in a series of
drilling intervals defined by the
borehole casing plan
w Employ logging while drilling
(LWD) and cuttings analysis for
most of this interval
w Core only near the bottom of the
hole for about 100 meters or as
time allows
w Measure stress and pore pressure
parameters by Extended Leak-Off
Tests (XLOT) and other downhole
techniques
The plate boundary target is clearly defined and in a region of SSE fault activity and partial locking: about 2,000 m deeper than current hole depth Shiraishi et al., in review, 2017
Expedition 358 key questions What are the structure, materials and physical properties of the deep inner accretionary wedge and the main plate boundary fault zone(s)? What is the in situ stress state and how does it change as we approach and enter the plate boundary fault zone? We fundamentally don’t know what the geology or stress conditions are in the plate boundary fault zone!
Science Leaders
Science Party Members
ESSAC: 14, USSSP: 9, J-DESC: 13, ANZIC: 1 Total = 37
Lessons learned from previous
expeditions (Exps. 338 & 348)
Time dependent fragile formation in accretionary prism
Short casing section + expandable casing (keep borehole
size)
Sealing additives to circulation mud (prevent water invasion
to the formation)
Introduce Non-stop circulation system (prevent pressure
change in well-bore)
Real-time geomechanics team (working 24/7 to monitor
real time borehole condition)
Efficient cuttings removalKuroshio Large Meandering Large meandering occurs after 12yrs absence Last meandering lasts in a year Global warming tends to last meandering
Drilling Sequence: Exp. 358
CIB activity
CIB Science Board Members
Yoshiyuki Tatsumi (Chair) David Goldberg Ryo Anma
Kobe University, Japan LDEO, Columbia University, Tokushima University, Japan
USA
2 year-term 3 year-term NEW 3 year-term NEW
Hiroshi Kitazato Benoit Ildefonse Keir Becker
Tokyo University of Marine University of Montpellier, University of Miami, USA
Science and Technology, France
Japan
3 year-term 3 year-term 3 year-termCIB decision since the last meeting CIB has received a new addendum, 603C-Add and is evaluating this addendum as either best- or worst-case contingency for Exp 358. At the same time, CIB forwards this addendum to the SEP site co-chair for a preliminary confirmation that the seismic data can justify the interpretation described in the addendum.
CIB decision since the last meeting CIB_Consensus_0318-07: CRISP/IBM/Hikurangi proposal Updates The CIB reaffirms the importance of the 1 October 2018 deadline specified in its 2017 consensus (0317_09) requesting updates for the CRISP (537), IBM (698), and Hikurangi (781) riser proposals. The CIB intends to review these updates by email in the month following the deadline, thus allowing a potential assistance from SEP in their evaluation before the January 2019 SEP meeting. SEP’s feedback will be considered for prioritization of future riser drilling projects after NanTroSEIZE and Lord Howe Rise at the 2019 CIB meeting. E-review by CIB, if needed ask SEP (June 2019 meeting) for assistance. And CIB discussed at June CIB meeting. but so far seems like not needed.
New JAMSTEC 7 years term will start from JFY2019 Chikyu and other 6 research vessels operation will be managed by a department in JAMSTEC Chikyu continues IODP operation with science supports No particular change, hope enhance more IODP operation Continue IODP core curation/service in KCC CIB & TAT continue same function for Chikyu operation Continue to support J-DESC/PMO activities More adaptable research platforms (vessels/ROVs/AUVs/HOV) management expected for site surveys, for shallow samplings, etc Efficient and effective platform management should be available within the 7 years term More internationalization requested by the JAMSTEC Advisory Board
J-DESC Beyond 2023 workshop 2-3 April 2019 in Yokohama Details are still under discussion
Thank You!
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