A new chart of hydraulic fracture height prediction based on fluid–solid coupling equations and rock fracture mechanics

The conventional method to predict hydraulic fracture height depends on linear elastic mechanics, and the typical Gulrajani–Nolte chart fails to reflect fracture height when the net pressure in the fracture is too high. Based on fluid–solid coupling equations and rock fracture mechanics, a new chart...

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Autores principales: Liu, Xiaoqiang, Qu, Zhanqing, Guo, Tiankui, Wang, Dongying, Tian, Qizhong, Lv, Wei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6227985/
https://www.ncbi.nlm.nih.gov/pubmed/30473816
http://dx.doi.org/10.1098/rsos.180600
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author Liu, Xiaoqiang
Qu, Zhanqing
Guo, Tiankui
Wang, Dongying
Tian, Qizhong
Lv, Wei
author_facet Liu, Xiaoqiang
Qu, Zhanqing
Guo, Tiankui
Wang, Dongying
Tian, Qizhong
Lv, Wei
author_sort Liu, Xiaoqiang
collection PubMed
description The conventional method to predict hydraulic fracture height depends on linear elastic mechanics, and the typical Gulrajani–Nolte chart fails to reflect fracture height when the net pressure in the fracture is too high. Based on fluid–solid coupling equations and rock fracture mechanics, a new chart is obtained by the ABAQUS extended finite-element method. Compared with the Gulrajani–Nolte chart, this new chart shows that longitudinal propagation of hydraulic fracture is still finite when the net pressure in the fracture is higher than in situ stress difference between reservoir and restraining barrier. The barrier has a significant shielding effect on the longitudinal propagation of hydraulic fracture, and there is a threshold for an injection rate of fracturing fluid to ensure hydraulic fracture propagates in the barrier. Fracture height decreases with the increase of in situ stress difference. When the ratio of net pressure to in situ stress difference is less than 0.56, the propagation of hydraulic fracture is completely restricted in the reservoir. Hydraulic fracturing parameters in Well Shen52 and Well Shen55 are optimized by using the new chart. Array acoustic wave logging shows that the actual fracture height is at an average error within 14.3% of the theoretical value, which proves the accuracy of the new chart for field application.
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spelling pubmed-62279852018-11-23 A new chart of hydraulic fracture height prediction based on fluid–solid coupling equations and rock fracture mechanics Liu, Xiaoqiang Qu, Zhanqing Guo, Tiankui Wang, Dongying Tian, Qizhong Lv, Wei R Soc Open Sci Engineering The conventional method to predict hydraulic fracture height depends on linear elastic mechanics, and the typical Gulrajani–Nolte chart fails to reflect fracture height when the net pressure in the fracture is too high. Based on fluid–solid coupling equations and rock fracture mechanics, a new chart is obtained by the ABAQUS extended finite-element method. Compared with the Gulrajani–Nolte chart, this new chart shows that longitudinal propagation of hydraulic fracture is still finite when the net pressure in the fracture is higher than in situ stress difference between reservoir and restraining barrier. The barrier has a significant shielding effect on the longitudinal propagation of hydraulic fracture, and there is a threshold for an injection rate of fracturing fluid to ensure hydraulic fracture propagates in the barrier. Fracture height decreases with the increase of in situ stress difference. When the ratio of net pressure to in situ stress difference is less than 0.56, the propagation of hydraulic fracture is completely restricted in the reservoir. Hydraulic fracturing parameters in Well Shen52 and Well Shen55 are optimized by using the new chart. Array acoustic wave logging shows that the actual fracture height is at an average error within 14.3% of the theoretical value, which proves the accuracy of the new chart for field application. The Royal Society 2018-10-10 /pmc/articles/PMC6227985/ /pubmed/30473816 http://dx.doi.org/10.1098/rsos.180600 Text en © 2018 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Engineering
Liu, Xiaoqiang
Qu, Zhanqing
Guo, Tiankui
Wang, Dongying
Tian, Qizhong
Lv, Wei
A new chart of hydraulic fracture height prediction based on fluid–solid coupling equations and rock fracture mechanics
title A new chart of hydraulic fracture height prediction based on fluid–solid coupling equations and rock fracture mechanics
title_full A new chart of hydraulic fracture height prediction based on fluid–solid coupling equations and rock fracture mechanics
title_fullStr A new chart of hydraulic fracture height prediction based on fluid–solid coupling equations and rock fracture mechanics
title_full_unstemmed A new chart of hydraulic fracture height prediction based on fluid–solid coupling equations and rock fracture mechanics
title_short A new chart of hydraulic fracture height prediction based on fluid–solid coupling equations and rock fracture mechanics
title_sort new chart of hydraulic fracture height prediction based on fluid–solid coupling equations and rock fracture mechanics
topic Engineering
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6227985/
https://www.ncbi.nlm.nih.gov/pubmed/30473816
http://dx.doi.org/10.1098/rsos.180600
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