Systems and methods for determining geologic properties using acoustic analysis

Patent metadata

Field	Value
Publication number	US-9797868-B2
Application number	US-201414295211-A
Country	US
Kind code	B2
Filing date	Jun 3, 2014
Priority date	Jul 14, 2008
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

Systems and methods which determine geologic properties using acoustic analysis are shown. Acoustic signals are collected during processing (e.g., crushing, shearing, striking, compressing, etc.) of geologic media, such as rock samples, for determining geologic properties according to embodiments. The acoustic signals collected may include frequency information, amplitude information, time information, etc. which may be utilized in determining geologic properties, such as geologic media properties (e.g., mineralogy, porosity, permeability, sealing capacity, fracability, compressive strength, compressibility, Poisson's Ratio, Youngs Modulus, Bulk Modulus, Shear Modulus), geologic structure properties (e.g., lithology, seal quality, reservoir quality), geologic acoustic properties (e.g., acoustic logging effectiveness, acoustic response, natural or harmonic frequencies, etc.). Embodiments may be used to provide determination of geologic properties from a variety of geologic media samples, such as cuttings, core samples, etc.

First claim

What is claimed is:

1. A method comprising:
processing a sample of geologic media for a primary purpose of fluid inclusion volatiles processing, wherein acoustic emissions are a byproduct of said processing;
sampling acoustic emissions from said processing; and
analyzing said sampled acoustic emissions to determine one or more geologic properties associated with said sample of geologic media, wherein said analyzing comprises analyzing a feature from a first sampled acoustic emission from said sample and a feature from a second sampled acoustic emission from said sample to determine a geologic property of said sample, wherein said geologic property comprises at least one of mineralogy, porosity, permeability, sealing capacity, fracability, compressive strength, compressibility, Poisson's Ratio, Youngs Modulus, Bulk Modulus, and Shear Modulus.

2. The method of claim 1 , wherein said processing comprises:
applying a crushing force to said sample.

3. The method of claim 1 , wherein said processing comprises:
applying a shearing force to said sample.

4. The method of claim 1 , wherein said processing comprises:
applying a striking force to said sample.

5. The method of claim 1 , wherein said processing comprises:
applying a compressing force to said sample.

6. The method of claim 1 , wherein said sample comprises a cutting of said geologic media produced by a well drilling operation.

7. The method of claim 1 , wherein said sample comprises a core sample of said geologic media produced using down-hole tools with respect to a well.

8. The method of claim 1 , wherein said analyzing comprises:
analyzing a plurality of features within a sampled acoustic emission from said sample to determine a geologic property of said sample.

9. The method of claim 1 , wherein said analyzing comprises:
analyzing a feature from a sampled acoustic emission from said sample and a feature from a sampled acoustic emission from another sample to determine a geologic property of said sample.

10. The method of claim 1 , wherein said analyzing comprises:
analyzing a feature from a sampled acoustic emission from said sample and a feature from a sampled acoustic emission from another sample to determine a geologic property of an area from which said sample and said another sample were obtained.

11. The method of claim 1 , further comprising:
processing said sampled acoustic emissions to remove artifacts in the acoustic signals not associated with sample properties.

12. A system comprising:
an acoustic signal acquisition system coupled to a geologic media processing system and operable to obtain acoustic signals emitted during processing of sample geologic media by said geologic media processing system, wherein said geologic media processing system comprises a fluid inclusion volatiles processing system and wherein said geologic media processing system provides processing of said sample for a primary purpose of fluid inclusion volatiles processing and wherein said acoustic signals are a byproduct of said processing; and
an acoustic analysis system in communication with said acoustic signal acquisition system and operable to analyze signals provided by said acoustic signal acquisition system to determine one or more geologic properties associated with said sample geologic media;
wherein said acoustic analysis system comprises a processor-based system operating under control of an instruction set operable to analyze said signals and determine said one or more geologic properties;
wherein said instruction set comprises a feature extraction module operable to identify one or more features within said signals provided by said acoustic signal acquisition system and a correlation engine operable to correlate said features to stored exemplary feature signatures.

13. The system of claim 12 , wherein said acoustic signal acquisition system comprises:
at least one transducer selected from the group consisting of a sound transducer, a pressure transducer, and a vibration transducer.

14. The system of claim 12 , wherein said acoustic signal acquisition system comprises:
at least one transducer disposed in a configuration selected from the group consisting of on a surface of said geologic media processing system, embedded in a structure of said geologic media processing system, and in a chamber of said geologic media processing system.

15. The system of claim 12 , wherein said acoustic signal acquisition system comprises:
a signal conditioning circuit, wherein said signal conditioning circuit provides signal conditioning selected from the group consisting of signal amplification, signal filtering, signal attenuation.

16. The system of claim 12 , wherein said processor-based system comprises:
a general purpose computer system.

17. A method comprising:
processing a sample of geologic media wherein said processing comprises one or more of applying a crushing force to said sample, applying a shearing force to said sample, applying a striking force to said sample, applying a compressing force to said sample, and fluid inclusion volatiles processing;
sampling acoustic emissions from said processing; and
analyzing said sampled acoustic emissions to determine one or more geologic properties associated with said sample of geologic media, wherein the geologic properties comprise one or more of mineralogy, porosity, permeability, sealing capacity, fracability, compressive strength, compressibility, Poisson's Ratio, Youngs Modulus, Bulk Modulus, and Shear Modulus,
wherein said analyzing comprises analyzing a feature from a first sampled acoustic emission from said sample and a feature from a second sampled acoustic emission from said sample to determine a geologic property of said sample; and
wherein said processing comprises processing said sample for a primary purpose of fluid inclusion volatiles processing, wherein said acoustic emissions are a byproduct of said processing of said sample for said primary purpose.

Assignees

• Macleod Gordon
• Pottorf Robert J
• Smith Dennis P
• Song Limin
• Xu Peng
• Liu Enru
• Exxonmobil Upstream Res Co

Inventors

• Macleod Gordon
• Pottorf Robert J
• Smith Dennis P
• Song Limin
• Xu Peng
• Liu Enru

Classifications

• G01N29/045

  by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks (measuring resonant frequency G01H13/00; measuring strength properties by application of mechanical stress G01N3/00) · CPC title

• G01N2291/0289

  Internal structure, e.g. defects, grain size, texture · CPC title

• G01N2291/0232

  Glass, ceramics, concrete or stone · CPC title

• G01N3/06 Primary

  Special adaptations of indicating or recording means · CPC title

• G01N2203/0658

  using acoustic or ultrasonic detectors · CPC title