Research on borehole stability of shale based on seepage-stress-damage coupling model
In oil drilling, one of the most complicated problems is borehole stability of shale. Based on the theory of continuum damage mechanics, a modified Mohr-Coulomb failure criterion according to plastic damage evolution and the seepage-stress coupling is established. Meanwhile, the damage evolution equ...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2014-01-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero27/numero_27_art_9.pdf |
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| _version_ | 1841562307861151744 |
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| author | Xiaofeng Ran Yuezhi Wang Shanpo Jia |
| author_facet | Xiaofeng Ran Yuezhi Wang Shanpo Jia |
| author_sort | Xiaofeng Ran |
| collection | DOAJ |
| description | In oil drilling, one of the most complicated problems is borehole stability of shale. Based on the theory of continuum damage mechanics, a modified Mohr-Coulomb failure criterion according to plastic damage evolution and the seepage-stress coupling is established. Meanwhile, the damage evolution equation which is based on equivalent plastic strain and the permeability evolution equation of shale are proposed in this paper. The physical model of borehole rock for a well in China western oilfield is set up to analyze the distribution of damage, permeability, stress, plastic strain and displacement. In the calculation process, the influence of rock damage to elastic modulus, cohesion and permeability is involved by writing a subroutine for ABAQUS. The results show that the rock damage evolution has a significant effect to the plastic strain and stress in plastic zone. Different drilling fluid density will produce different damage in its value, range and type. This study improves the theory of mechanical mechanism of borehole collapse and fracture, and provides a reference for the further research of seepage-stress-chemical-damage coupling of wall rock. |
| format | Article |
| id | doaj-art-4eee1d053ebd4f25bfb04c55e9f7e4d7 |
| institution | Kabale University |
| issn | 1971-8993 1971-8993 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-4eee1d053ebd4f25bfb04c55e9f7e4d72025-01-03T01:02:44ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932014-01-01827748210.3221/IGF-ESIS.27.09Research on borehole stability of shale based on seepage-stress-damage coupling modelXiaofeng Ran0Yuezhi Wang1Shanpo Jia2Key Laboratory of Exploration Technologies for Oil and Gas Resources of Ministry of Education, Yangtze University, Wuhan, Hubei 430100, China.Key Laboratory of Exploration Technologies for Oil and Gas Resources of Ministry of Education, Yangtze University, Wuhan, Hubei 430100, China.School of Urban Construction, Yangtze University, Jingzhou, Hubei 434023, China.In oil drilling, one of the most complicated problems is borehole stability of shale. Based on the theory of continuum damage mechanics, a modified Mohr-Coulomb failure criterion according to plastic damage evolution and the seepage-stress coupling is established. Meanwhile, the damage evolution equation which is based on equivalent plastic strain and the permeability evolution equation of shale are proposed in this paper. The physical model of borehole rock for a well in China western oilfield is set up to analyze the distribution of damage, permeability, stress, plastic strain and displacement. In the calculation process, the influence of rock damage to elastic modulus, cohesion and permeability is involved by writing a subroutine for ABAQUS. The results show that the rock damage evolution has a significant effect to the plastic strain and stress in plastic zone. Different drilling fluid density will produce different damage in its value, range and type. This study improves the theory of mechanical mechanism of borehole collapse and fracture, and provides a reference for the further research of seepage-stress-chemical-damage coupling of wall rock.http://www.gruppofrattura.it/pdf/rivista/numero27/numero_27_art_9.pdfShaleSeepage-stress couplingdamage |
| spellingShingle | Xiaofeng Ran Yuezhi Wang Shanpo Jia Research on borehole stability of shale based on seepage-stress-damage coupling model Fracture and Structural Integrity Shale Seepage-stress coupling damage |
| title | Research on borehole stability of shale based on seepage-stress-damage coupling model |
| title_full | Research on borehole stability of shale based on seepage-stress-damage coupling model |
| title_fullStr | Research on borehole stability of shale based on seepage-stress-damage coupling model |
| title_full_unstemmed | Research on borehole stability of shale based on seepage-stress-damage coupling model |
| title_short | Research on borehole stability of shale based on seepage-stress-damage coupling model |
| title_sort | research on borehole stability of shale based on seepage stress damage coupling model |
| topic | Shale Seepage-stress coupling damage |
| url | http://www.gruppofrattura.it/pdf/rivista/numero27/numero_27_art_9.pdf |
| work_keys_str_mv | AT xiaofengran researchonboreholestabilityofshalebasedonseepagestressdamagecouplingmodel AT yuezhiwang researchonboreholestabilityofshalebasedonseepagestressdamagecouplingmodel AT shanpojia researchonboreholestabilityofshalebasedonseepagestressdamagecouplingmodel |