The impact of cement sheath mechanical properties on near wellbore hydraulic fracture initiation
Hydraulic fracturing is a stimulation technique which is used, in particular in unconventional reservoirs such as shale gas and tight sandstones, in order to en-hance production of hydrocarbon. Hydraulic fracturing is usually operated through the perforations in cased-hole wellbores. The perforation...
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| Format: | Conference Paper |
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ISRM
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/15207 |
| _version_ | 1848748831199461376 |
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| author | Fallahzadeh, S. Rasouli, Vamegh |
| author2 | ISRM |
| author_facet | ISRM Fallahzadeh, S. Rasouli, Vamegh |
| author_sort | Fallahzadeh, S. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Hydraulic fracturing is a stimulation technique which is used, in particular in unconventional reservoirs such as shale gas and tight sandstones, in order to en-hance production of hydrocarbon. Hydraulic fracturing is usually operated through the perforations in cased-hole wellbores. The perforation tunnels cut the casing and cement sheath filled the annulus space between the casing and the wellbore wall to communicate the formation to the wellbore. The near wellbore condition is significantly important as the hydraulic fracture crosses this zone after its initiation from the wellbore wall. The presence of casing is considerably important in terms of stress distribution around the wellbore. Also, the quality of the cement sheath may affect the initiation of an induced fracture and the geometry of propagated fracture plane around the wellbore wall. In this study a generic model was developed to analyze the wellbore stress distribution, considering the effects of casing and cement sheath. The effect of various properties of cement, including Poisson’s ratio, elasticity modulus, thermal expansion coeficent, Biot’s constant and permeability, on fracture initiation were investigated. In this model analytical equations were applied and numerical simulations were performed to estimate the stress profile around a cased cemented borehole with arbitrary inclination and azimuth. This model allows studying the fracture initiation in a cased perforated wellbore. The model was applied to the data from a real wellbore and good results were obtained. |
| first_indexed | 2025-11-14T07:11:17Z |
| format | Conference Paper |
| id | curtin-20.500.11937-15207 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:11:17Z |
| publishDate | 2012 |
| publisher | ISRM |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-152072017-01-30T11:48:32Z The impact of cement sheath mechanical properties on near wellbore hydraulic fracture initiation Fallahzadeh, S. Rasouli, Vamegh ISRM stress distribution hydraulic fracturing cement sheath casing near well-bore Hydraulic fracturing is a stimulation technique which is used, in particular in unconventional reservoirs such as shale gas and tight sandstones, in order to en-hance production of hydrocarbon. Hydraulic fracturing is usually operated through the perforations in cased-hole wellbores. The perforation tunnels cut the casing and cement sheath filled the annulus space between the casing and the wellbore wall to communicate the formation to the wellbore. The near wellbore condition is significantly important as the hydraulic fracture crosses this zone after its initiation from the wellbore wall. The presence of casing is considerably important in terms of stress distribution around the wellbore. Also, the quality of the cement sheath may affect the initiation of an induced fracture and the geometry of propagated fracture plane around the wellbore wall. In this study a generic model was developed to analyze the wellbore stress distribution, considering the effects of casing and cement sheath. The effect of various properties of cement, including Poisson’s ratio, elasticity modulus, thermal expansion coeficent, Biot’s constant and permeability, on fracture initiation were investigated. In this model analytical equations were applied and numerical simulations were performed to estimate the stress profile around a cased cemented borehole with arbitrary inclination and azimuth. This model allows studying the fracture initiation in a cased perforated wellbore. The model was applied to the data from a real wellbore and good results were obtained. 2012 Conference Paper http://hdl.handle.net/20.500.11937/15207 ISRM restricted |
| spellingShingle | stress distribution hydraulic fracturing cement sheath casing near well-bore Fallahzadeh, S. Rasouli, Vamegh The impact of cement sheath mechanical properties on near wellbore hydraulic fracture initiation |
| title | The impact of cement sheath mechanical properties on near wellbore hydraulic fracture initiation |
| title_full | The impact of cement sheath mechanical properties on near wellbore hydraulic fracture initiation |
| title_fullStr | The impact of cement sheath mechanical properties on near wellbore hydraulic fracture initiation |
| title_full_unstemmed | The impact of cement sheath mechanical properties on near wellbore hydraulic fracture initiation |
| title_short | The impact of cement sheath mechanical properties on near wellbore hydraulic fracture initiation |
| title_sort | impact of cement sheath mechanical properties on near wellbore hydraulic fracture initiation |
| topic | stress distribution hydraulic fracturing cement sheath casing near well-bore |
| url | http://hdl.handle.net/20.500.11937/15207 |