Site Summaries (continued)
Water depth (m):
Target drilling depth (mbsf):
Approved maximum penetration (mbsf):
Regional site survey lines
Site CAS-03B is located on the first uplifted ridge of accreted sediments. A BSR is located at 290 ms TWT (~230 mbsf).
Objectives include detailed characterization of
core physical properties
logging (LWD and wireline)
The BSR reflection strength appears frequency dependent. The low-frequency data of Line 89-08 (~40 Hz) show a much stronger and continuous reflection than the high-frequency MCS data from 1999 (~100 Hz).
The objective is to determine the nature of the BSR reflection and the thickness of (if any) free gas zone underneath the BSR by wireline and LWD logging. If time permits, a zero-offset VSP will be performed.
Drilling and Logging program
APC to refusal; XCB; PCS and HYACINTH pending funding) pressure cores
LWD, triple combo, FMS-sonic, multiple use of APCT, DVTPP
Nature of rock anticipated:
Interlayered silts and clays, some authigenic carbonates possible
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