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US 10,519,769 B2Granted
Apparatus and method using measurements taken while drilling to generate and map mechanical boundaries and mechanical rock properties along a borehole
AssigneeFracture ID, Inc.
InventorsJesse B. Havens, James D. Lakings, R. Christopher Neale
Life of this patent
Estimating the term…
Abstract
The present disclosure involves a novel way of using drilling vibrations generated by the deformation of a rock formation in response to forces acting on the rock formation, where the forces are related to a drill bit and/or drilling fluid system, to identify the nature and occurrence of fractures, fracture swarms and other mechanical discontinuities (boundaries) such as bedding planes and/or faults that offset or otherwise separate rock formations with different mechanical rock properties.
Claims26
A method of characterizing rock properties comprising:
- aligning acoustical signals in relation to a position of a drill bit with respect to an axis of symmetry of a rock formation, the acoustical signals obtained from one or more sensors positioned on a component of a bottom hole assembly, the acoustical signals generated from the drill bit interacting with the rock formation while drilling a wellbore;
- processing the aligned acoustical signals to obtain forces acting on the drill bit interacting with the rock formation while drilling the wellbore and to obtain displacements of the drill bit interacting with the rock formation while drilling the wellbore;
- and
- processing the forces and the displacements to obtain at least one set of data values representative of a mechanical rock property of the rock formation along the wellbore created by the drill bit interacting with the rock formation for a period of time.
1 more element
An apparatus comprising:
- a processing unit in communication with at least one tangible machine readable media including computer executable instructions to perform the operations of:
- aligning acoustical signals in relation to a position of a drill bit with respect to an axis of symmetry of a rock formation, the acoustical signals obtained from one or more sensors positioned on a component of a bottom hole assembly, the acoustical signals generated from the drill bit interacting with the rock formation while drilling a wellbore;
- processing the aligned acoustical signals to obtain forces acting on the drill bit interacting with the rock formation while drilling the wellbore and to obtain displacements of the drill bit interacting with the rock formation while drilling the wellbore;
- and
- processing the forces and the displacements to obtain at least one set of data values representative of a mechanical rock property of the rock formation along the wellbore created by the drill bit interacting with the rock formation for a period of time.
2 more elements
A method of characterizing rock properties comprising:
- aligning acoustical signals and a rate of rotation signal with respect to an axis of symmetry of a rock formation, the acoustical signals obtained from one or more sensors positioned on a component of a bottom hole assembly, the rate of rotation signal obtained from a gyro sensor and is in relation to a position of a drill bit, the acoustical signals and the rate of rotation signal generated from the drill bit interacting with the rock formation while drilling a wellbore;
- processing the aligned acoustical and the aligned rate of rotation signal to obtain forces acting on the drill bit interacting with the rock formation while drilling the wellbore and to obtain displacements of the drill bit interacting with the rock formation while drilling the wellbore;
- and
- processing the forces and the displacements to obtain at least one set of data values representative of a mechanical rock property of the rock formation along the wellbore created by the drill bit interacting with the rock formation for a period of time.
1 more element
Dependencies are inferred from the claim text.