Rig-site and laboratory use of CWT acoustic velocity measurements on cuttings

摘要

A continuous wave techniuqe,CWT,for measurement of acoustic phase velocities on cuttings is presented.the equipment is particularly well suited for testing of small samples like cuttings,and measurements even on sub-mm thick shale cuttings have been performed.This yields potential access to a new source of data on the drilled formation that cna also be attained in quasi real-time at the rig-site.the prototype equipment developed is protable,fast and easy to use.Tests have been performed both at the rig-site,as well as in the laboratoryPotential aplicaitns are e.g. within estimation of mechanical properties of shales,effects of varous fluids/drilling muds,estimation of seismic parameters,and estimation fo pore pressure.