Distributed Acoustic Sensing for Passive Ranging
AssigneeHalliburton Energy Services, Inc.
InventorsGlenn A. Wilson, Burkay Donderici
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Abstract
A passive system for ranging between two wellbores where a distributed acoustic sensor system is deployed in a first wellbore and a drill bit in a second wellbore being drilled is utilized and an acoustic source to generate an acoustic signal for measurement by the distributed acoustic sensor system. The dynamic strain along the distributed acoustic sensor system is detected with an optical interrogation system and utilized to determine direction and distance between the first wellbore and the second wellbore.
Claims28
A wellbore ranging system comprising:
- an optical waveguide disposed in a first wellbore of a formation;
- and
- an acoustic source disposed in a second wellbore and acoustically coupled with the formation.
An acoustic ranging system for wellbores, the system comprising:
- a first wellbore with a fiber optic ranging system disposed therein;
- and
- an acoustic source disposed to generate an acoustic signal.
A wellbore ranging method comprising:
- deploying a distributed acoustic sensing system in a first wellbore;
- utilizing an acoustic source outside of the first wellbore to generate an acoustic signal;
- detecting the acoustic signal with the distributed acoustic sensing system;
- and
- determining the position of the first wellbore in a formation based on the detected acoustic signal.
Dependencies are inferred from the claim text.