Table 2. Leg 195 Alternate Drill Sites | Table of Contents

Table 1. Leg 195 Operations Plan and Time Estimate

Site Location Water Operations Description   Transit Drilling Logging Total
No.   Depth           On-site
  (Lat/Long) (mbrf)     (days) (days) (days) (days)
                 
Guam 13.27°N, 144.38°E   Transit f/Guam to MAF-4B, ~95 nmi @ 10.5 kt [9.0 hrs] 0.4      
                 
MAF-4B 13°47.0' N 2948 A: RIH w/18-1/2" bit, TV survey (12 hr), jet-in test ~60m [130.0 hrs]   5.4 0.0 21.6
South 146°0.0'E   APC/XCB to ~420 mbsf (temperature w/Adara/DVTP)          
Chamorro                
Seamount     B. Drill to ~200 mbsf, RCB to ~420 mbsf (DVTP as req'd) [84.75 hrs]   3.5 2.0  
CORK     Need to RCB core (Hole B) is dependent upon results          
      & TD achieved in previously cored APC/XCB (Hole A)          
      Release bit/WL log dependent on co-chief decision [48.00 hrs]        
                 
      C: Jet-in recone w/20" 94 lb/ft csg to ~25 mbsf (2 jt) [257.0 hrs]   10.7 0.0  
      Reenter/drill w/18-1/2" bit and 22" U/R to ~220 mbsf          
      M/U~200 m 16" 75 lb/ft csg (~16 jts)/RIH/RE/cmt csg          
      Reenter/drill w/14-3/4" tricone bit to ~420 mbsf          
      M/U ~400 m 10-3/4" 40.5 lb/ft csg/RIH/RE/latch csg          
      Use ~31 jts/~377 m of standard 10-3/4" csg plus 2 jts          
      or ~23 m of screened/perforated 10-3/4" csg          
      Reenter/CORK/run thermister string/osmotic sampler          
      Deploy CORK ROV/submersible platform/unlatch f/DP          
                 
      Transit f/MAF-4B to WP-1B, ~ 712 nmi @ 10.5 kt [67.75 hrs] 2.8      
                 
WP-1B 19°17.85'N 5658 A: APC/XCB to ~380 mbsf (basement contact) [98.25 hrs]   4.1 0.0 25.7
ION 135°5.95' E   plug hole w/cmt, APC core orientation, ~5 Adara          
seismometer                
emplacement     B: Jet-in test ~60 m/APC 2nd hole to ~150 mbsf [44.25 hrs]   1.8 0.0  
                 
      C: Drill w/RCB c'bit to ~360 mbsf [120.25 hrs]   5.0 1.6  
      Core w/RCB to ~470 mbsf, release bit w/MBR          
      Wireline logging: rig-up, triple combo, FMS-sonic [38.0 hrs]        
      (2-passes in basement), DLL, UBI, and rig-down          
                 
      D: Set reentry cone, jet-in 60m 16" casing [315.5 hrs]   13.2 0.0  
      Drill to ~425 mbsf w/14-3/4" tricone bit          
      Set and cement ~410 m of 10-3/4" 54 lb/ft casing          
      Drill ahead to ~470 mbsf w/9-7/8" tricone bit          
      Deploy/cmt seismometer instr pkg @ ~460 mbsf          
      Deploy and release from battery platform          
                 
      Note: Should Leg 195 primary operations be completed          
      ahead of schedule there is interest in drilling an          
      APC/XCB hole w/wireline logging at alt site KS-1          
                 
Keelung 25.09° N, 121.44°E   Transit f/ WP-1B to Keelung, Taiwan, ~831 nmi @ 10.2 kt [83.5 hrs] 3.5      
                 
  SUBTOTAL: 6.7 43.7 3.6 47.3
  TOTAL OPERATING DAYS (Including 5 day port call): 59.0

Table 2. Leg 195 Alternate Drill Sites | Table of Contents