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Keywords: minimum stress
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2313
... ABSTRACT: Minimum stress and fracture gradient are critical parameters used in geomechanics modeling, such as borehole stability and wellbore strengthening analyses, to optimize operational plans and reduce drilling risks. They can be inferred through interpretation of initiation and closure...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2032
... the familiar continuum, or Kirsch, solution where the fracture initiates, P C , when the internal pressure in the borehole exceed the minimum stress concentration around the borehole plus the tensile strength, T . The stress concentration relates the maximum and minimum stresses normal to the borehole, σ...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0078
... is compared to a database of many high-quality stress measurements. Even though a relatively good match for minimum stress is obtained in young sediments, some discrepancies are locally observed. This method should not replace dedicated stress measurements, but it may help fill the gaps between the depths...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0072
... that there was good agreement (within 7°) between the experimental results and theoretical predictions. flow in porous media strength Reservoir Characterization Fluid Dynamics reservoir geomechanics shear band waste management Upstream Oil & Gas Mean stress constant lode angle minimum stress...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-887
... strength fracture initiation minimum stress fracture permeability Upstream Oil & Gas regime FBP interpretation propagation hydraulic fracturing cumulative probability plot horizontal stress frictional strength Drilling mechanics Wellbore Design subsurface database Statoil tensile...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-302
... Abstract: Leak-off pressure and lost circulation data are generally thought to be reflective of minimum stress. We propose that in the analysis of these data for stress and fracture gradient information, an alternative interpretation be considered where the data may reflect a shear failure...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-662
... of the fracture close to the wellbore. hydraulic fracturing perforated borehole stress 0 Upstream Oil & Gas fracture initiation geometry perforation wellbore integrity minimum stress perpendicular orientation mortar sample Wellbore Design experimental investigation fracture fracture...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-408
... reservoirs. In order to be able to optimize sustainable injection design, two well tests were performed with long fall-offs. The main parameters determined are the reservoir connectivity, minimum stress, flow capacity and pore volume compressibility. This article presents the results of these well tests...
Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-177
... of leak-off pressure, the minimum stress, and the matrix stress ratio. Contrary to the widely-used Eaton model, results from this study suggest that the locally-calibrated matrix stress ratio, K0, appears to be approximately constant as a function of depth. As a guideline for deriving facture gradients...
Proceedings Papers

Paper presented at the The 34th U.S. Symposium on Rock Mechanics (USRMS), June 28–30, 1993
Paper Number: ARMA-93-0471
... & Gas fracture growth zone development situ stress Reservoir Characterization fracture pattern fracture process zone development Fracture Zone process zone development hydraulic fracturing Shlyapobersky fracture initiation minimum stress reservoir geomechanics orientation network tensile...
Proceedings Papers

Paper presented at the The 32nd U.S. Symposium on Rock Mechanics (USRMS), July 10–12, 1991
Paper Number: ARMA-91-015
... such as the elastic uniaxial strain model( Hubbert and Willis 1957, Eaton 1969)and the Mohr-Coulomb failure model (Hubbert and Willis 1957). These models have often provided reasonable estimations of the minimum stress from a knowledge of the overburden stress, pore pressure and relevant rock properties (Anderson et...
Proceedings Papers

Paper presented at the The 32nd U.S. Symposium on Rock Mechanics (USRMS), July 10–12, 1991
Paper Number: ARMA-91-035
... strength breakdown procedure minimum stress leakoff cycle reservoir geomechanics drilling fluids and materials Upstream Oil & Gas Rock mechanics gauge fracture pressure decrease leakoff test packer downhole gauge stress data situ stress stress measurement fluid density tensile...
Proceedings Papers

Paper presented at the The 28th U.S. Symposium on Rock Mechanics (USRMS), June 29–July 1, 1987
Paper Number: ARMA-87-0283
... the pressure-flow relationship becomes non-linear, provides a lower minimum stress estimate (by about 0.7 MPa) than pressure transient methods. Hydraulic jacking is an attractive method for estimating minimum stress values particularly in fractured rock masses where hydraulic fractures are likely to intersect...
Proceedings Papers

Paper presented at the The 25th U.S. Symposium on Rock Mechanics (USRMS), June 25–27, 1984
Paper Number: ARMA-84-0095
... on breakdown pressures. Flow rate and borehole diameter variations were found to have a marked effect on breakdown pressures. Shut-in pressure values, which are generally used as an indication of the minimum stress value, exceeded the applied minimum stresses by 10 to 60% depending on the method...
Proceedings Papers

Paper presented at the The 23rd U.S Symposium on Rock Mechanics (USRMS), August 25–27, 1982
Paper Number: ARMA-82-183
... and field tests which were performed to assess the reliability of the instantaneous shut in pressure as an estimate of the minimum stress acting perpendicular to the wellbore axis. DETERMINATION OF THE INSTANTANEOUS SHUT IN PRESSURE Experience reported in this paper suggests that for low flow rate...

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