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1. (WO2018125058) QUASI-STATIC STONELEY SLOWNESS ESTIMATION

Pub. No.:    WO/2018/125058    International Application No.:    PCT/US2016/068745
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Wed Dec 28 00:59:59 CET 2016
IPC: E21B 47/00
G01V 1/52
G01V 1/48
Applicants: HALLIBURTON ENERGY SERVICES, INC.
Inventors: WANG, Ruijia
CHANG, Chung
SUN, Baichun
Title: QUASI-STATIC STONELEY SLOWNESS ESTIMATION
Abstract:
A method and system for producing a Quasi-Static Stoneley Slowness log. The method for producing a Quasi-Static Stoneley Slowness log may comprise recording a pressure wave at a receiver; determining a slowness-frequency range with an information handling system from the pressure wave, processing a frequency-domain semblance, extracting a Stoneley Dispersion, minimizing a misfit between theoretical and the Stoneley Dispersion, and identifying Quasi-Static Stoneley slowness from the Stoneley Dispersion. The well measurement system for producing an Quasi-Static Stoneley Slowness log and shear slowness anisotropy may comprise a downhole tool, a vehicle, and an information handling system. Wherein the information handling system may be operable to record a pressure wave at a receiver, determine a slowness-frequency range with an information handling system from the pressure wave, process a frequency-domain semblance, extract a Stoneley Dispersion; minimize a misfit between theoretical and the Stoneley Dispersion; and identify Quasi-Static Stoneley slowness from the Stoneley Dispersion.