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Keywords: magnitude
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Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47210-MS
... in laboratory or back-calculated based on earthquake mechanism. P. 59 upstream oil & gas horizontal stress minimum horizontal stress magnitude friction angle fault angle fault residual friction angle stress data poisson assumption strength stress estimation addis residual friction angle...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47240-MS
... in sands and shales based on core testing and finite element analysis placed tighter constraints on the relative principal stress magnitudes and the magnitude of the maximum horizontal stress. P. 179 cohesion mpa papanastasiou constraint mud pressure friction wellbore instability stress...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47235-MS
... magnitude elot stress gradient minimum stress estimate leak-off test stress estimate hydraulic fracturing upstream oil & gas reservoir geomechanics pressure record reservoir characterization well control horizontal stress fracture .A. , SPMSRM 47235 A Comparison Of Leak-Off Test...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47253-MS
... magnitudes and occurrence time. Results of these calculation agree with observations of seismic events reported for the Tatarstan oil province (Russia). It is believed that similar results can be found for other oil production regions. P. 265 orientation propagation seismicity effective shear...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47249-MS
... consolidated sandstones. P.229 upstream oil & gas mechanism breakout reservoir geomechanics borehole wall specimen matrix distinct shape hydraulic fracturing failure mechanism cross section stress concentration magnitude quartz grain experiment spring line porosity principal stress...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47236-MS
.... An S H orientation of approximately NI000E is found in the western part, while the S H orientation is found to be approximately N800E for the wells in the eastern part. Investigating the conditions for fracture initiation in three of the wells allows to constrain the possible magnitude of S H...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47212-MS
... with an extensional stress regime. Analysis of breakouts in inclined wells in two sand reservoirs allows to constrain the magnitude of the maximum horizontal principal stress, SHmax. and further indicates an active normal faulting environment with a clear, but small degree of horizontal stress anisotropy (i.e., Sv...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47243-MS
... of wellbore failure, and earthquake focal plane mechanisms indicate high horizontal compression (i.e., SHmax>Sv and Shmin=Sv) on the west side of the Viking Graben and decreased horizontal stresses on the east side. In this study we extend the available knowledge about regional stress magnitudes...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47213-MS
... fault. Hydraulic fracturing tests from these wells further show that the magnitude of Shmin is low enough to lead to frictional failure on the Stillwater and nearby subparallel faults, suggesting that fault slip is responsible for the high reservoir productivity. Similar measurements were conducted...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47244-MS
... Abstract We examine drilling-induced tensile fractures in five vertical and inclined exploration wells in the Visund oil field in the northern North Sea. Each well yields a consistent azimuth of the maximum horizontal stress both laterally and with depth. The magnitudes of the three principal...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47251-MS
... geomechanics criteria rock strength mohr-coulomb criterion reservoir characterization criterion upstream oil & gas triaxial compression magnitude wellbore design strength drucker-prager criteria failure criterion critical mud weight cohesion intermediate principal stress drucker-prager...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47239-MS
... Abstract In this paper, we propose a method to estimate in-situ rock stress magnitudes from laboratory measurements on core material. Once the principal stress directions have been established by some other technique, our method allows the identification of the minor and major effective...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47333-MS
... geomechanics effective plastic strain reservoir characterization input data mpa depletion magnitude perforation strength ..d. SPE/lSRM 47333 Advanced Sand Prediction in a User Friendly Wrapping H. Kjorholt, SPE, and H. Joranson, SPE, and P. Markestad, WE, and A.M. Raaen, SPE, and R. Viken, SPE...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47272-MS
... this comparison, we make recommendations on the use of LOT data, and suggest a new method of estimating the minimum horizontal stress magnitude () from LOT pressure/volume plots. In-situ stress magnitudes have been investigated by applying these methods to data from over 1000 LOTs in North Sea boreholes...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47289-MS
..., consequently, the maximum horizontal stress change accompanying depletion can only be estimated using models. The ability to predict the stress-depletion response of a field requires an understanding of what processes control the initial stress magnitudes, and the boundary conditions which the reservoir...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47359-MS
... Abstract Two main theories exist to explain the manifestation of electrical potential changes during rock deformation; (i) the electrokinetic effect due to fluid flow within a porous medium. This theory, derived from colloidal science relates the magnitude of this potential anomaly...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47276-MS
... at the water front. If a significant proportion of the total acoustic activity is caused in association with the water front, then time-lapse microseismic monitoring could represent a useful tool for tracking the position of the water flood. P. 387 orientation magnitude deformation well logging...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47393-MS
... subjected to pressure and/or thermal gradients. Studies involving coupled stress, thermal and flow modeling, in reservoir engineering, using both mechanical and hydraulic properties for the rock fabric and incorporating the stress magnitude and its directionality, have demonstrated the concept...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47371-MS
... orientations in conjunction with stress orientations and magnitudes determined by Ref. 1 suggests that fault zone permeability is high only when individual fractures as well as the overall Stillwater fault zone are optimally oriented and critically stressed for frictional failure. Fracture geometry may also...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47238-MS
... at the higher stress anisotropies but gave a poor correlation between applied stress and a) strain magnitudes, b) calculated stress, for a measured Poisson ratio (v) of 0.3. Lower v values gave better data fit, but it is suggested that the use of a Poisson correction of (he measured strain. Using low values...

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