Introduction to Borehole Observatories in ODP/IODP

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Fluid Sampling via CORKs (I)Original CORK design incorporated1/2” teflon tubing running fromformation to valves on the wellhead,but this did not work well.Major improvement: development ofself-contained OsmoSamplers installedon the sensor string and recoveredyears later.Latest multi-zone “CORK-II” and“CORK-Lite” designs incorporatecapability to deploy OsmoSamplers forfluid geochemical and microbiologicalobjectives both deep in sealed holesand at wellhead valves with access toin-situ fluids via small-diameter tubing.
Fluid Sampling via CORKs (II)When the formation is overpressured and transmissive, as at somesediment-buried basement highs in young crust, then sampling viathe CORK valve is promising.PrototypeCowen/Johsonmicrobiologicalsampler at Hole1026B. SeeCowen et al,Nature (2003)for results.
Page 2 and 3: Early ODPObservatory EffortsDating
Page 4 and 5: ODP CORK and OSN/ION Holes, 1991-20
Page 6 and 7: Motivation: Hydrological Disruption
Page 8 and 9: Original ODP CORK Hydrogeological O
Page 11 and 12: Evolution of CORK Designs, 1991-201
Page 13: CORK components deployed inside or
Page 17 and 18: 2011 ROV Fly-Around, Hole 1362A COR
Page 19 and 20: •••CORK Funding Model(s)Red/o
Page 21 and 22: Wireline CORK + CORK-LiteWireline C
Page 23: Borehole Observatories Connected to

Introduction to Borehole Observatories in ODP/IODP

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