Patent Document ID: 10036246
Application ID: 15233541
Patent Flag: 1

Claim One:
1. A non-transitory computer readable medium having processor readable petrophysical properties analyzing program code embodied on the computer readable medium, the processor readable program code for programming one or more processors to perform operations for analyzing properties of rock in a formation in real-time during drilling, the processor readable program code comprising a set of instructions that when executed by the one or more processors, cause the one or more processors to perform the operations of: sending sampling commands to a surface data acquisition unit in communication with a downhole data interface through a surface data interface and a communication medium extending between the surface data interface and the downhole data interface, the downhole data interface operably coupled to a plurality of acoustic sensors carried by a downhole sensor assembly, receiving digitized raw acoustic sensor data from the surface data acquisition unit, the digitized raw acoustic sensor data representing an acoustic signal generated real-time as a result of rotational contact of a drill bit with rock during drilling; transforming the digitized raw acoustic sensor data into the frequency domain, filtering the transformed data, and performing the following processing operations: deriving a plurality of acoustic characteristics from the filtered data, the plurality of acoustic characteristics including mean frequency and normalized deviation of frequency; comparing the mean frequency and the normalized deviation of frequency of the rock undergoing drilling with mean frequency and normalized deviation of frequency of a plurality of rock samples having different known lithologies; identifying lithology type of the rock undergoing drilling responsive to the operation of comparing; deriving petrophysical properties from the filtered data utilizing a petrophysical properties evaluation algorithm employable to identify one or more petrophysical properties of rock undergoing drilling; and providing the one or more petrophysical properties of rock undergoing drilling or the lithology type of the rock undergoing drilling to a driller to assist in drilling operations.