IODP Expedition 343/343T Preliminary Report

doi:10.2204/iodp.pr.343343T.2012

Strategy/Drilling plan

Details regarding the original drilling plan are available in Mori et al. (2012), but the general planned sequence of drilling was as follows:

Drilling the pilot hole with logging while drilling (LWD)/measurement while drilling (MWD) to total depth (TD), planned for ~900 mbsf;
Running casing and a completion assembly (including long-term temperature monitoring with the autonomous string) in the LWD/MWD hole to ~900 mbsf (casing to 50 m below fault, ~900 m);
Drilling a second hole with rotary coring barrel (RCB) drilling (with center bit) to ~500 mbsf and continuation with RCB coring to ~900 mbsf; and
Running casing and a completion assembly for the second hole (including long-term temperature and pressure monitoring with the telemetered string) to ~900 mbsf (casing to 50 m below fault, ~900 m).