APPARATUS AND METHODS FOR MEASURING MUD SLOWNESS IN A BOREHOLE

摘要

A method for determining mud slowness of a mud in a borehole includes determining slowness as a function of frequency for at least one fluid mode from a set of measurements acquired with a sonic tool in the borehole; and determining the mud slowness from the slowne ss as a function of frequency for the at least one fluid mode. A system for determining mud slowness of a mud in a borehole, comprising a processor and a memory, wherein the memory stores a program having instructions for determining slowness as a function of frequency for at leas t one fluid mode from a set of measurements acquired with a sonic tool in the borehole; and determining the mud slowness from the slowness as a function of frequency for the at least one fluid mode.