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1. (WO2016062388) SYSTEM AND METHOD FOR ESTIMATING PROPERTIES OF GEOLOGICAL FORMATIONS DRILLED USING UNDERREAMER

Pub. No.:    WO/2016/062388    International Application No.:    PCT/EP2015/002043
Publication Date: Fri Apr 29 01:59:59 CEST 2016 International Filing Date: Fri Oct 16 01:59:59 CEST 2015
IPC: G01V 9/00
E21B 49/00
G01N 33/28
G01V 1/40
Applicants: GEOSERVICES EQUIPEMENTS SAS
Inventors: RINGER, Maurice
LESSI, Jacques
Title: SYSTEM AND METHOD FOR ESTIMATING PROPERTIES OF GEOLOGICAL FORMATIONS DRILLED USING UNDERREAMER
Abstract:
Devices and methods for estimating properties of geological formations drilled with a drill bit and an underreamer are provided. A method according to the disclosure includes receiving a set of mixed well-logging data corresponding to a geological formation at multiple depths of a wellbore drilled using a bottom hole assembly (BHA) that includes a drill bit and a first underreamer. The drill bit and the first underreamer are spaced a first distance apart from one another. The method also includes separating the set of mixed well-logging data into first well-logging data corresponding to the geological formation at depths drilled by the drill bit and second well-logging data corresponding to the geological formation at depths reamed by the first underreamer.