IODP

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doi:10.2204/iodp.sp.308.2005

SITE SUMMARIES (CONTINUED)

Site: URS-1B
Priority:
 		Primary
Position:
 		28.07974007°N, 89.13930517°W
Water depth (m):
 		1057
Target drilling depth (mbsf):
 		612
Approved maximum penetration (mbsf):
 		612
Survey coverage:
  • Morgus HR line 150
  • Morgus HR trace 1100
    • Objectives:
         		Hydrodynamic analysis of a passive margin. Ursa sites will test the flow-focusing model by drilling to 612 mbsf (20 m above the predicted top of the Blue Unit) in an overpressured region where overburden is thick (URS-1B) and where it is thinner (URS-2C, URS-3C).
    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 interbedded levee sands

    Site: URS-2C
    Priority:
         		Primary
    Position:
         		28.09124346°N, 89.07252124°W
    Water depth (m):
         		1262
    Target drilling depth (mbsf):
         		358
    Approved maximum penetration (mbsf):
         		358
    Survey coverage:
  • Morgus HR line 150
  • Morgus HR trace 2170
    • Objectives:
         		Hydrodynamic analysis of a passive margin. Ursa sites will test the flow focusing model by drilling to 358 mbsf (20 m above the predicted top of the Blue Unit) in an overpressured region where overburden is thick (URS-1B) and where it is thinner (URS-2C, URS-3C).
    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 interbedded levee sands

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