Introduction to Borehole Observatories in ODP/IODP

More documents

Recommendations

Info

Original ODP CORK Hydrogeological ObservatoryMotivation: Seal reentry holes toprevent hydrological perturbation andallow reestablishment of in-situconditions, with capabilities for:• Long-term monitoring of T & P for• Background in-situ values• Hydrologic transients• Subsurface tidal loading effects• Transients of tectonic origin•••Sampling of formation fluidsActive hydrologic formation testingRecently, microbiological expts14 Original CORKs installed 1991-2001 in sedimented young oceaniccrust (shown) and subductionsettings.
Limitations of Original Design Multi-Zone ModelsWith only one seal at seafloor, signalsfrom entire open-hole or perforatedsection are averaged.For many cases, isolating multiplezones in a single hole would yieldmuch more representative results.Starting in 1999, three multi-zoneCORK models have been developed,all utilizing downhole packers:• “Advanced CORK” or ACORK• “Wireline CORK”• “CORK-II”14 multi-zone CORKs installed 2001 -2011 in sedimented young ocean crustand subduction settings.Advanced CORK Workshop (1998)
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 11 and 12: Evolution of CORK Designs, 1991-201
Page 13 and 14: CORK components deployed inside or
Page 15 and 16: Fluid Sampling via CORKs (II)When t
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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?