In Situ Stress Prediction in Subsurface Rocks: An Overview and a New Method
Methods for determining in situ stresses are reviewed, and a new approach is proposed for a better prediction of the in situ stresses. For theoretically calculating horizontal stresses, horizontal strains are needed; however, these strains are very difficult to be obtained. Alternative methods are p...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/6639793 |
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| author | Yushuai Zhang Shangxian Yin Jincai Zhang |
| author_facet | Yushuai Zhang Shangxian Yin Jincai Zhang |
| author_sort | Yushuai Zhang |
| collection | DOAJ |
| description | Methods for determining in situ stresses are reviewed, and a new approach is proposed for a better prediction of the in situ stresses. For theoretically calculating horizontal stresses, horizontal strains are needed; however, these strains are very difficult to be obtained. Alternative methods are presented in this paper to allow an easier way for determining horizontal stresses. The uniaxial strain method is oversimplified for the minimum horizontal stress determination; however, it is the lower bound minimum horizontal stress. Based on this concept, a modified stress polygon method is proposed to obtain the minimum and maximum horizontal stresses. This new stress polygon is easier to implement and is more accurate to determine in situ stresses by narrowing the area of the conventional stress polygon when drilling-induced tensile fracture and wellbore breakout data are available. Using the generalized Hooke’s law and coupling pore pressure and in situ stresses, a new method for estimating the maximum horizontal stress is proposed. Combined it to the stress polygon method, a reliable in situ stress estimation can be obtained. The field measurement method, such as minifrac test, is also analyzed in different stress regimes to determine horizontal stress magnitudes and calibrate the proposed theoretical method. The proposed workflow combined theoretical methods to field measurements provides an integrated approach for horizontal stress estimation. |
| format | Article |
| id | doaj-art-1c1cf1f31f044bb0a5212fe4a08424a7 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-1c1cf1f31f044bb0a5212fe4a08424a72025-02-03T06:06:39ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/66397936639793In Situ Stress Prediction in Subsurface Rocks: An Overview and a New MethodYushuai Zhang0Shangxian Yin1Jincai Zhang2College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong, ChinaNorth China Institute of Science and Technology, Yanjiao, ChinaSinopec Tech Houston, Texas, USAMethods for determining in situ stresses are reviewed, and a new approach is proposed for a better prediction of the in situ stresses. For theoretically calculating horizontal stresses, horizontal strains are needed; however, these strains are very difficult to be obtained. Alternative methods are presented in this paper to allow an easier way for determining horizontal stresses. The uniaxial strain method is oversimplified for the minimum horizontal stress determination; however, it is the lower bound minimum horizontal stress. Based on this concept, a modified stress polygon method is proposed to obtain the minimum and maximum horizontal stresses. This new stress polygon is easier to implement and is more accurate to determine in situ stresses by narrowing the area of the conventional stress polygon when drilling-induced tensile fracture and wellbore breakout data are available. Using the generalized Hooke’s law and coupling pore pressure and in situ stresses, a new method for estimating the maximum horizontal stress is proposed. Combined it to the stress polygon method, a reliable in situ stress estimation can be obtained. The field measurement method, such as minifrac test, is also analyzed in different stress regimes to determine horizontal stress magnitudes and calibrate the proposed theoretical method. The proposed workflow combined theoretical methods to field measurements provides an integrated approach for horizontal stress estimation.http://dx.doi.org/10.1155/2021/6639793 |
| spellingShingle | Yushuai Zhang Shangxian Yin Jincai Zhang In Situ Stress Prediction in Subsurface Rocks: An Overview and a New Method Geofluids |
| title | In Situ Stress Prediction in Subsurface Rocks: An Overview and a New Method |
| title_full | In Situ Stress Prediction in Subsurface Rocks: An Overview and a New Method |
| title_fullStr | In Situ Stress Prediction in Subsurface Rocks: An Overview and a New Method |
| title_full_unstemmed | In Situ Stress Prediction in Subsurface Rocks: An Overview and a New Method |
| title_short | In Situ Stress Prediction in Subsurface Rocks: An Overview and a New Method |
| title_sort | in situ stress prediction in subsurface rocks an overview and a new method |
| url | http://dx.doi.org/10.1155/2021/6639793 |
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