Improvement of the "Slowness-Time Coherence" Method of Processing Borehole Acoustic Data Arrays
Introduction. The study of borehole acoustic waves is an important stage in geophysical well research. The main acoustic parameters are P-wave velocity of compression, S-wave velocity of shear, L-wave velocity of Stoneley along the boundary between the rock and the well fluid. The "Slowness-Tim...
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V.M. Glushkov Institute of Cybernetics
2024-12-01
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| Series: | Кібернетика та комп'ютерні технології |
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| Online Access: | http://cctech.org.ua/13-vertikalnoe-menyu-en/657-abstract-24-4-5-arte |
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| author | Sergii Lavreniuk Yevhen Nazarenko Daria Tulchynska Petro Tulchynskyi |
| author_facet | Sergii Lavreniuk Yevhen Nazarenko Daria Tulchynska Petro Tulchynskyi |
| author_sort | Sergii Lavreniuk |
| collection | DOAJ |
| description | Introduction. The study of borehole acoustic waves is an important stage in geophysical well research. The main acoustic parameters are P-wave velocity of compression, S-wave velocity of shear, L-wave velocity of Stoneley along the boundary between the rock and the well fluid.
The "Slowness-Time Coherence" (STC) method of estimating the velocity (slowness) is based on the coherence of signal arrays on 2 or more receivers of the well sonic tool. Compared with traditional acoustic logging, the main advantage of STC method is the automation of processing. The main disadvantages of STC method are the high cost and complexity of operating multi-channel sonic tools, and low quality of STC method in layers of high anisotropy, high fracturing, carbonate deposits, in horizontal wells.
These disadvantages caused STC method spread slowly until the last decade. However, at present, the world's leading geophysical service companies (Halliburton, Schlumberger, etc.) use sonic tools with 8-12 receivers and 4 modes of the source signal. Over the past decade, the quality of tools and processing technologies has improved, but the problem of the high cost of using modern tools remains extremely relevant in Ukraine.
The purpose of the article is – to investigate modern methods of data processing of the well sonic tools; to identify the features of the "Slowness-Time Coherence" (STC) algorithm; to propose improvements to the STC method; to implement, to test, and to integrate into production the acoustic data processing technology based on improved STC algorithm.
Results. Improved "Slowness-Time Coherence" (STC) algorithm for calculating the velocity (slowness) of an acoustic wave in geological deposits. In the software package "GeoPoshuk" STC technology has been developed for the processing of acoustic waves. The technology based on the basic and improved STC algorithms. A methodology for comparing the improved STC algorithm with the basic STC algorithm has been developed. Statistical data show the advantage of the improved STC algorithm over the basic one.
Conclusions. The use of the improved STC algorithm provides better automatic data processing compared to the basic STC algorithm. |
| format | Article |
| id | doaj-art-085934fe03eb4f3eaae63c07232adfd9 |
| institution | OA Journals |
| issn | 2707-4501 2707-451X |
| language | English |
| publishDate | 2024-12-01 |
| publisher | V.M. Glushkov Institute of Cybernetics |
| record_format | Article |
| series | Кібернетика та комп'ютерні технології |
| spelling | doaj-art-085934fe03eb4f3eaae63c07232adfd92025-08-20T02:32:34ZengV.M. Glushkov Institute of CyberneticsКібернетика та комп'ютерні технології2707-45012707-451X2024-12-014505910.34229/2707-451X.24.4.510-34229-2707-451X-24-4-5Improvement of the "Slowness-Time Coherence" Method of Processing Borehole Acoustic Data ArraysSergii Lavreniuk0https://orcid.org/0000-0002-5181-7681Yevhen Nazarenko1https://orcid.org/0009-0009-8906-373XDaria Tulchynska2https://orcid.org/0000-0002-0680-2675Petro Tulchynskyi3V.M. Glushkov Institute of Cybernetics of the NAS of Ukraine, KyivV.M. Glushkov Institute of Cybernetics of the NAS of Ukraine, KyivV.M. Glushkov Institute of Cybernetics of the NAS of Ukraine, KyivV.M. Glushkov Institute of Cybernetics of the NAS of Ukraine, KyivIntroduction. The study of borehole acoustic waves is an important stage in geophysical well research. The main acoustic parameters are P-wave velocity of compression, S-wave velocity of shear, L-wave velocity of Stoneley along the boundary between the rock and the well fluid. The "Slowness-Time Coherence" (STC) method of estimating the velocity (slowness) is based on the coherence of signal arrays on 2 or more receivers of the well sonic tool. Compared with traditional acoustic logging, the main advantage of STC method is the automation of processing. The main disadvantages of STC method are the high cost and complexity of operating multi-channel sonic tools, and low quality of STC method in layers of high anisotropy, high fracturing, carbonate deposits, in horizontal wells. These disadvantages caused STC method spread slowly until the last decade. However, at present, the world's leading geophysical service companies (Halliburton, Schlumberger, etc.) use sonic tools with 8-12 receivers and 4 modes of the source signal. Over the past decade, the quality of tools and processing technologies has improved, but the problem of the high cost of using modern tools remains extremely relevant in Ukraine. The purpose of the article is – to investigate modern methods of data processing of the well sonic tools; to identify the features of the "Slowness-Time Coherence" (STC) algorithm; to propose improvements to the STC method; to implement, to test, and to integrate into production the acoustic data processing technology based on improved STC algorithm. Results. Improved "Slowness-Time Coherence" (STC) algorithm for calculating the velocity (slowness) of an acoustic wave in geological deposits. In the software package "GeoPoshuk" STC technology has been developed for the processing of acoustic waves. The technology based on the basic and improved STC algorithms. A methodology for comparing the improved STC algorithm with the basic STC algorithm has been developed. Statistical data show the advantage of the improved STC algorithm over the basic one. Conclusions. The use of the improved STC algorithm provides better automatic data processing compared to the basic STC algorithm.http://cctech.org.ua/13-vertikalnoe-menyu-en/657-abstract-24-4-5-artecoherenceacoustic wavessonic toolsgeophysical well researchslowness-time coherence" (stc) algorithm |
| spellingShingle | Sergii Lavreniuk Yevhen Nazarenko Daria Tulchynska Petro Tulchynskyi Improvement of the "Slowness-Time Coherence" Method of Processing Borehole Acoustic Data Arrays Кібернетика та комп'ютерні технології coherence acoustic waves sonic tools geophysical well research slowness-time coherence" (stc) algorithm |
| title | Improvement of the "Slowness-Time Coherence" Method of Processing Borehole Acoustic Data Arrays |
| title_full | Improvement of the "Slowness-Time Coherence" Method of Processing Borehole Acoustic Data Arrays |
| title_fullStr | Improvement of the "Slowness-Time Coherence" Method of Processing Borehole Acoustic Data Arrays |
| title_full_unstemmed | Improvement of the "Slowness-Time Coherence" Method of Processing Borehole Acoustic Data Arrays |
| title_short | Improvement of the "Slowness-Time Coherence" Method of Processing Borehole Acoustic Data Arrays |
| title_sort | improvement of the slowness time coherence method of processing borehole acoustic data arrays |
| topic | coherence acoustic waves sonic tools geophysical well research slowness-time coherence" (stc) algorithm |
| url | http://cctech.org.ua/13-vertikalnoe-menyu-en/657-abstract-24-4-5-arte |
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