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US 2017/0285206 A1Published application
System and methodology for estimating formation elastic properties using decomposed and undecomposed signal
AssigneeSchlumberger Technology Corporation
InventorsNaoki Sakiyama, Denis Syresin
Life of this patent
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Abstract
A technique facilitates estimating elastic properties of formations by exciting a wavefield and acquiring the signal with and without azimuthal decompositions. For example, the elastic properties may be estimated by exciting a multipole wavefield and acquiring the signal with and without the azimuthal decomposition. The technique is effective for estimating elastic properties of azimuthally homogeneous and heterogeneous formations including isotropic and anisotropic formations.
Claims20
A method for evaluating a formation, comprising:
- exciting a multipole wavefield;
- acquiring an acoustic signal with and without azimuthal decomposition;
- and
- using the acoustic signal acquired to estimate elastic properties of the formation.
1 more element
A method, comprising:
- providing a sonic logging tool with a plurality of transmitters and a plurality of receivers;
- conveying the sonic logging tool downhole into a borehole;
- operating the plurality of transmitters to excite a multipole wavefield;
- acquiring an acoustic signal via the plurality of receivers, the acoustic signal being acquired with and without azimuthal decomposition;
- using the acoustic signal acquired to estimate elastic properties of the formation;
- and
- mapping the formation based on the estimate of elastic properties.
4 more elements
A system for evaluating a formation, comprising:
- a tool having:
- a plurality of acoustic transmitters to excite a multipole wavefield;
- a plurality of acoustic receivers to acquire acoustic signals with and without azimuthal decomposition;
- and a processing system configured to process the acoustic signals with and without azimuthal decomposition to estimate elastic properties of the formation.
1 more element
Dependencies are inferred from the claim text.