IODP

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doi:10.2204/iodp.sp.308.2005

SITE SUMMARIES

Site: BT4-2A
Priority:
Primary
Position:
27.30136298°N, 94.38753682°W
Water depth (m):
1476
Target drilling depth (mbsf):
340
Approved maximum penetration (mbsf):
340
Survey coverage:
  • Rudder 2-D dipline 3020
  • Shotpoint 220.76
  • Rudder 2-D crossline 3045
  • Objectives:
    Hydrodynamic analysis of a passive margin. Brazos-Trinity Basin #4 sites are to serve as a reference location to establish basic rock and fluid properties over a range of effective stresses in a normally pressured section.
    Drilling program:
    APC to refusal with drillover and XCB
    Wireline logging program:
    Triple combo, FMS-sonic, VSP
    MWD program:
    GVR, ADN, APWD
    Nature of rock anticipated:
    Hemipelagic mudstone with some unconsolidated turbidite sand

    Site: BT4-4A
    Priority:
    Primary
    Position:
    27.26628028°N, 94.40315809°W
    Water depth (m):
    1435
    Target drilling depth (mbsf):
    230
    Approved maximum penetration (mbsf):
    230
    Survey coverage:
  • Rudder 2-D dipline 3020
  • Shotpoint 187.27
  • Objectives:
    Hydrodynamic analysis of a passive margin. Brazos-Trinity Basin #4 sites are to serve as a reference location to establish basic rock and fluid properties over a range of effective stresses in a normally pressured section.
    Drilling program:
    APC to refusal with drillover and XCB
    Wireline logging program:
    Triple combo, FMS-sonic, VSP
    MWD program:
    GVR, ADN, APWD
    Nature of rock anticipated:
    Hemipelagic mudstone with some unconsolidated turbidite sand

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