Site CAS-01B
Proposed site:
CAS-01B
Priority:
Primary
Position:
48°41.884'N, 126°51.924'W
Water depth (m):
1325
Target drilling depth (mbsf):
350
Approved maximum penetration (mbsf):
400
Survey coverage:
Regional site survey lines
• Line 89-08
• MCS 3-D (inline 38)
• MCS Line XL03
Figure F8
Objective:
Site CAS-01B is a revisit to Sites 889/890. A strong BSR is apparent in regional, low-frequency seismic data (Line 89-08), but higher frequency data reveal a reduction in the BSR reflection strength.
Main objectives include characterization of
• pore fluid chemistry
• core physical properties
• gas hydrate concentration estimates
A further objective is to determine the nature of the BSR reflection and the thickness of the free gas zone (if any) underneath the BSR by wireline and LWD logging and by a zero-offset VSP.
Drilling and Logging program
APC to refusal; XCB; PCS and HYACINTH (pending funding) pressure cores
Logging program
LWD, triple combo, FMS-sonic, zero-offset VSP, multiple use of APCT, DVTPP
Nature of rock anticipated:
Interlayered silts and clays, some authigenic carbonates possible