STRESS ANALYSIS ON FRACTURE AND NEAR WELLBORE

doi:10.3863/j.issn.1000-2634.2001.01.011

西南石油大学学报(自然科学版) ›› 2001, Vol. 23 ›› Issue (3): 37-39.DOI: 10.3863/j.issn.1000-2634.2001.01.011

• 石油工程 • Previous Articles Next Articles

STRESS ANALYSIS ON FRACTURE AND NEAR WELLBORE

LIAN Zhang-hua¹ KANG Yi-li¹ XU Jin² et al

Southwest Petroleum Inst, Nanchong Sichuan 637001, China

Received:2000-09-22 Revised:1900-01-01 Online:2001-08-20 Published:2001-08-20
Contact: LIAN Zhang-hua

Abstract

Abstract: Based on the mechanics theory, the paper presented the FEM model of wellbore, fracture and formation for tight gas sandstone reservoirs in western Sichuan basin, and simulating the angle change between the fracture and horizontal plane resulting in the stress change on the fracture and near wellbore.This paper mainly studied the change principle of the principal
stresses and equivalent stresses on the horizontal plane fracture and near the wellbore. With the increasing of the incline angle of formation fracture, the maximum equivalent stresses near the wellbore on the fracture gradually transferred to the two ends of the borehole ellipse cross-section shorter axis. It is a guidance meaning to further study the borehole stability, the breakout direction of borehole wall or the stress sensitive on the fracture.

Key words: fracture, principal stress, equivalent stress, FEM model

CLC Number:

TE21

LIAN Zhang-hua KANG Yi-li XU Jin et al. STRESS ANALYSIS ON FRACTURE AND NEAR WELLBORE[J]. 西南石油大学学报(自然科学版), 2001, 23(3): 37-39.

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http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2001/V23/I3/37

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STRESS ANALYSIS ON FRACTURE AND NEAR WELLBORE

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