Ultrasonic measurements performed on rock cores
AssigneeSchlumberger Technology Corporation
InventorsFernando Garcia-Osuna, Pierre Campanac
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Abstract
One or more embodiments and methods of analyzing a formation sample with in a coring tool are disclosed herein. The methods and embodiments may include extracting a first core from a sidewall of a wellbore with a coring tool at a first depth, ultrasonically measuring a sound speed of the first core, transmitting the ultrasonically measured sound speed of the first core to a surface display unit, analyzing the ultrasonically measured sound speed in real time, determining the quality of the first core, extracting a second core at the first depth if the first core is determined to be low quality, and extracting the second core at a second depth if the core first is determined to be high quality.
Claims19
An apparatus, comprising:
- a downhole core analysis unit comprising:
- an axially extending passageway configured to receive a core removed from a sidewall of a borehole extending into a subterranean formation;
- an ejector rod configured to push the core through the passageway;
- a plurality of cavities disposed on an inner surface of the passageway;
- and
- a plurality of ultrasonic measurement unit assemblies disposed in the plurality of cavities such that at least two of the ultrasonic measurement unit assemblies are positioned in diametrically opposed pairs across the passageway and are radially compressed by axial movement of the core through the passageway.
A method comprising:
- pushing, via an ejector rod, a first core through an axially extending passageway of a downhole core analysis unit;
- and
- transmitting ultrasonic waves between a plurality of ultrasonic measurement unit assemblies to obtain a measurement—for the first core, wherein the plurality of ultrasonic measurement unit assemblies are disposed in a plurality of cavities disposed on an inner surface of the passageway such that at least two of the ultrasonic measurement unit assemblies are positioned in diametrically opposed pairs across the passageway and are radially compressed by axial movement of the first core through the passageway.
Dependencies are inferred from the claim text.