Determination of stress orientation and magnitude in deep wells

Zoback, Mark D.; Barton, Colleen A.; Brudy, Martin; Castillo, David; Finkbeiner, Thomas; Grollimund, Balz; Moos, Daniel; Peška, Pavel; Ward, Chris; Wiprut, David

doi:10.1016/j.ijrmms.2003.07.001

Cited by 863 publications

(482 citation statements)

References 40 publications

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“…Stress concentration around the wellbore drilled in a stressed elastic medium can be calculated using equations developed by Kirsch (1898). Considering the assignability of the stress concentration and the nature of the created failures at the wellbore wall, it is possible to extract useful information about in situ stress magnitudes utilizing a suitable failure criterion (Zoback et al 2003). The Mohr-Coulomb and maximum tensile stress criteria are the most commonly used failure criteria for analysis of shear failure and tensile failure, respectively (Rasouli et al 2011).…”

Section: Wellbore Failures Analysismentioning

confidence: 99%

“…The Mohr-Coulomb and maximum tensile stress criteria are the most commonly used failure criteria for analysis of shear failure and tensile failure, respectively (Rasouli et al 2011). Zoback et al (2003) presented a simple strategy for estimation of horizontal stress state in deep wellbores based on the failure evidences of wellbore wall and tectonic regime of the studied field. In this method, the allowable values of horizontal stresses, which are illustrated in a stress polygon, is obtained using the friction coefficient of the earth's crust as follows (Jaeger and Cook 1979):…”

Section: Wellbore Failures Analysismentioning

confidence: 99%

“…S v is a factor due to weight of the overburden, and its magnitude can be calculated using overburden density log (McGarr and Gay 1978). According to Zoback et al (2003), hydraulic fracturing test, leak-off test (LOT), and measurement of pressure while drilling (PWD) are three common methods for the least principal stress measurement in the deep wells. The magnitude of minimum horizontal stress (S h ) in the normal and strike-slip faulting regimes can be measured using the mentioned methods.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Determination of minimum and maximum stress profiles using wellbore failure evidences: a case study—a deep oil well in the southwest of Iran

Molaghab

Taherynia

Aghda

et al. 2017

J Petrol Explor Prod Technol

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The main objective of this paper is estimating the horizontal stresses and calibration of the log-derived horizontal stress profiles in deep oil wells according to their wall failure evidences, including both compressive (breakouts) and tensile failures (drilling-induced tensile fractures). Estimation of the horizontal stress profiles using well logs is one of the standard methods in the oil industry. Another method for estimating horizontal stresses is analyzing failure evidences in the wellbore wall. By integrating these two methods, a practical strategy was followed in this research to determine the horizontal stress profiles. By this strategy, minimum and maximum horizontal stress profiles are determined in such a way that the stress concentration at the wellbore wall at the tensile fracture identified depths, exceeds the formation tensile strength, while at the breakouts identified depths it exceeds the compressive strength of the formation. An advantage of this procedure is that does not require to measure in situ stresses. Also, due to the presence of a large number of breakouts and the induced fractures detected in different zones of a deep wellbore, log-derived stress profile calibration is done using the stress state in different zones that causes to increase the accuracy and reliability of the obtained horizontal stress profile. The proposed solution was applied to determine the horizontal stress profiles in a deep oil well in the southwest of Iran as a real case.

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Section: Wellbore Failures Analysismentioning

confidence: 99%

Section: Wellbore Failures Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Determination of minimum and maximum stress profiles using wellbore failure evidences: a case study—a deep oil well in the southwest of Iran

Molaghab

Taherynia

Aghda

et al. 2017

J Petrol Explor Prod Technol

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“…The borehole is irregular after the breakouts during the process of drilling engineering (Mastin 1988;Zoback et al 2003;Zhang et al 2008). A casing is cemented inside the irregular wellbore in order to keep the wellbore stable.…”

Section: Example 2: Stresses Inside the Multi-casing Structure In Thementioning

confidence: 99%

Numerical stress analysis for the multi-casing structure inside a wellbore in the formation using the boundary element method

et al. 2016

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A multi-casing structure in drilling engineering can be considered as an inhomogeneous body consisting of many different materials. The mechanical behavior of the inhomogeneous body in an infinite domain is very complicated. In this paper, a detailed expression about the fictitious stress method of the boundary element method (BEM) is demonstrated for the inhomogeneous body. Then the fictitious stress method is deployed to investigate the stresses for the multi-casing structure under non-uniform loading conditions and an irregular wellbore. Three examples of the multi-casing structure in the borehole imply the high effectiveness of BEM for complex geometries related to the borehole in an infinite formation. The effects of casing eccentricity and the interfacial gap on the stress field are discussed. The eccentric casing takes the potential yield when the eccentric orientation is along the direction of S h . Under different eccentric orientations, the von Mises stress in the casing increases with increasing degree of eccentricity. The radial stress in the multi-casing structure is always continuous along the radius, but the circumferential stress is discontinuous at the interface. The radial stress decreases and the circumferential stress increases with the increasing of the interfacial gap between the adjacent materials.

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“…9). In a vertical borehole, the orientation of breakouts, or compressive borehole wall failures upon drilling, is a well-established indicator of the orientation of the horizontal maximum principal stress in the present-day stress field (Zoback et al, 2003). Drilling-induced tensile fractures (DITF) were observed less frequently, primarily at Site C0001 in the splay fault thrust sheet.…”

Section: Indicators Of Stress Regimementioning

confidence: 99%

NanTroSEIZE Stage 1 Expeditions 314, 315, and 316: First Drilling Proram of the Nankai Trough Seismogenic Zone Experiment

Tobin

Kinoshita

Ashi

et al. 2009

Scientific Drilling

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Determination of stress orientation and magnitude in deep wells

Cited by 863 publications

References 40 publications

Determination of minimum and maximum stress profiles using wellbore failure evidences: a case study—a deep oil well in the southwest of Iran

Determination of minimum and maximum stress profiles using wellbore failure evidences: a case study—a deep oil well in the southwest of Iran

Numerical stress analysis for the multi-casing structure inside a wellbore in the formation using the boundary element method

NanTroSEIZE Stage 1 Expeditions 314, 315, and 316: First Drilling Proram of the Nankai Trough Seismogenic Zone Experiment

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