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In Situ Stress Distribution and Variation Monitored by Microseismic Tracking on a Fractured Horizontal Well: A Case Study from the Qinshui Basin

[Image: see text] In situ stress is an important parameter regulating the production of coalbed methane (CBM), and the monitoring of rock deformation can provide a description of the state of stress. Microseismic monitoring in a multistage fractured horizontal CBM well was conducted as a case study...

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Autores principales: Tian, Lin, Li, Zhenhua, Cao, Yunxing, Liu, Shimin, Song, Yongliang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9089681/
https://www.ncbi.nlm.nih.gov/pubmed/35573209
http://dx.doi.org/10.1021/acsomega.2c01356
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author Tian, Lin
Li, Zhenhua
Cao, Yunxing
Liu, Shimin
Song, Yongliang
author_facet Tian, Lin
Li, Zhenhua
Cao, Yunxing
Liu, Shimin
Song, Yongliang
author_sort Tian, Lin
collection PubMed
description [Image: see text] In situ stress is an important parameter regulating the production of coalbed methane (CBM), and the monitoring of rock deformation can provide a description of the state of stress. Microseismic monitoring in a multistage fractured horizontal CBM well was conducted as a case study with a completion depth of 1445.36 m. The results show that there is a good correlation among the seismicity parameters, b-value, stress drop, fracture length, fracture density, and orientation. In the stress concentration region, the fracture is longer with a smaller density, where the b-value is lower. On the contrary, in the stress relaxation zone, the fracture is shorter with a complex shape, where the b-value is higher. Stress drop is relatively higher where fractures are concentrated, which indicate the areas with successful reservoir stimulation. The reliability of the above results was verified by the normal fault occurring between stages 7 and 8. In the area affected by the hanging wall of the normal fault (stage 6 and 7), the b-value is 0.38–0.39, while in the area affected by the footwall (stage 8 and 9), the b-value is 0.64–0.66. This phenomenon reflects an obvious stress concentration in the hanging wall of normal fault, which is consistent with the conventional understanding. The microseismic source parameters have great potential in evaluating reservoir stress. With further exploration of source parameters, microseismic will provide more support for CBM development.
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spelling pubmed-90896812022-05-12 In Situ Stress Distribution and Variation Monitored by Microseismic Tracking on a Fractured Horizontal Well: A Case Study from the Qinshui Basin Tian, Lin Li, Zhenhua Cao, Yunxing Liu, Shimin Song, Yongliang ACS Omega [Image: see text] In situ stress is an important parameter regulating the production of coalbed methane (CBM), and the monitoring of rock deformation can provide a description of the state of stress. Microseismic monitoring in a multistage fractured horizontal CBM well was conducted as a case study with a completion depth of 1445.36 m. The results show that there is a good correlation among the seismicity parameters, b-value, stress drop, fracture length, fracture density, and orientation. In the stress concentration region, the fracture is longer with a smaller density, where the b-value is lower. On the contrary, in the stress relaxation zone, the fracture is shorter with a complex shape, where the b-value is higher. Stress drop is relatively higher where fractures are concentrated, which indicate the areas with successful reservoir stimulation. The reliability of the above results was verified by the normal fault occurring between stages 7 and 8. In the area affected by the hanging wall of the normal fault (stage 6 and 7), the b-value is 0.38–0.39, while in the area affected by the footwall (stage 8 and 9), the b-value is 0.64–0.66. This phenomenon reflects an obvious stress concentration in the hanging wall of normal fault, which is consistent with the conventional understanding. The microseismic source parameters have great potential in evaluating reservoir stress. With further exploration of source parameters, microseismic will provide more support for CBM development. American Chemical Society 2022-04-15 /pmc/articles/PMC9089681/ /pubmed/35573209 http://dx.doi.org/10.1021/acsomega.2c01356 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Tian, Lin
Li, Zhenhua
Cao, Yunxing
Liu, Shimin
Song, Yongliang
In Situ Stress Distribution and Variation Monitored by Microseismic Tracking on a Fractured Horizontal Well: A Case Study from the Qinshui Basin
title In Situ Stress Distribution and Variation Monitored by Microseismic Tracking on a Fractured Horizontal Well: A Case Study from the Qinshui Basin
title_full In Situ Stress Distribution and Variation Monitored by Microseismic Tracking on a Fractured Horizontal Well: A Case Study from the Qinshui Basin
title_fullStr In Situ Stress Distribution and Variation Monitored by Microseismic Tracking on a Fractured Horizontal Well: A Case Study from the Qinshui Basin
title_full_unstemmed In Situ Stress Distribution and Variation Monitored by Microseismic Tracking on a Fractured Horizontal Well: A Case Study from the Qinshui Basin
title_short In Situ Stress Distribution and Variation Monitored by Microseismic Tracking on a Fractured Horizontal Well: A Case Study from the Qinshui Basin
title_sort in situ stress distribution and variation monitored by microseismic tracking on a fractured horizontal well: a case study from the qinshui basin
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9089681/
https://www.ncbi.nlm.nih.gov/pubmed/35573209
http://dx.doi.org/10.1021/acsomega.2c01356
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