Operations Plan–Option 3 | Table of Contents

Leg 197 Operations Plan and Time Estimate
Option 2              
Site Location Water Operations Description Transit Drilling Logging Total
No. Lat/Long Depth   (days) (days) (days) On-site
               
    (mbrf)          
Yokohama 35°16.80'N   Transit 1552 nmi from Yokohama, Japan, to Site HE-3B @ 11.0 kt 5.9      
  139° 23.40' E            
               
HE-3B 50° 48.60' N 2740 Drill ahead through sediment with a center bit to 450 mbsf   7.6 1.3 8.9
  167° 33.00' E   RCB from 450 to 620 mbsf (170 m into basement) using        
      FFF for one bit change        
      Wireline logs (Triple combo, Mag Tool, and FMS)        
               
               
      Transit 11 nmi from Site HE-3B to Site HE-3A @ 11.0 kt 0.0      
               
               
HE-3A 50° 57.00' N 2773 Drill ahead through sediment with a center bit to 500 mbsf   7.5 0.9 8.4
  167° 44.40' E   RCB from 500 to 670 mbsf (170 m into basement) using FFF        
      for one bit change        
      Wireline logs (Triple combo and FMS)        
               
               
      Transit 580 nmi from Site HE-3A to Site HE-4B @ 10.5 kt 2.3      
               
               
HE-4B 41° 29.00' N 1300 RCB to 220 mbsf (180 m into basement)   5.4 0.6 6.0
  170° 38.00' E   Wireline logs (Triple combo and FMS)        
               
               
      Transit 200 nmi from Site HE-4B to Site HE-5C @ 10.5 kt 0.8      
               
               
HE-5C 38° 09.50' N 1480 RCB to 240 mbsf (180 m into basement)   5.6 0.6 6.2
  170° 50.00' E   Wireline logs (Triple combo and FMS)        
               
               
      Transit 201 nmi from Site HE-5C to Site HE-6A @ 10.5 kt 0.8      
               
               
HE-6A 34° 58.94' N 1331 RCB to 260 mbsf (180 m into basement)   5.4 0.6 6.0
  172° 08.98' E   Wireline logs (Triple combo and FMS)        
               
               
Yokohama 35° 16.80' N   Transit 1640 nmi from Site HE-6A to Yokohama, Japan @ 10.0 kt 6.8      
  139° 23.40' E            
      TOTAL: 16.5 31.5 4.0 35.5
               
        TOTAL DAYS:   52.0  

Operations Plan–Option 3 | Table of Contents