Analysis of Multistage and Other Creep Data for Domal Salts

Munson, D.E.

doi:10.2172/1897

Cited by 24 publications

(75 citation statements)

References 2 publications

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“…These mechanisms are (1) a dislocation climb-controlled creep mechanism at high temperatures and low stresses, (2) an empirically specified, but undefined mechanism at low temperatures and low stresses, and (3) a dislocation slip-controlled mechanism at high stresses (Munson et al 1989). These mechanisms act in parallel, which means the individual steady-state creep rates can be summed over the three mechanisms to give the total steady-state creep rate, as follows (Munson 1998):…”

Section: Saltmentioning

confidence: 99%

“…In particular, those critical parameters that primarily distinguish one salt material from another salt material are the steady-state responses as represented by the structure factors (A's and B's) and the transient strain rate limits ( * t ) as represented by K 0 (Munson 1998).…”

Section: Footnote 3 (Continued)mentioning

confidence: 99%

“…However, the limited database permits only structure factors to be determined; all other parameters were established on the basis of the clean WIPP salt database and the logical extension of the WIPP parameters, considering how material variation can affect the parameter. These results are given in Table 4 for clean WIPP salt and the BC salt (Munson 1998). A 2 F is defined as A 2 multiplication factor to examine the A 2 factor effect, and K 0 F is defined as K 0 multiplication factor to examine the K 0 factor effect in Table 4.…”

Section: Footnote 3 (Continued)mentioning

confidence: 99%

“…Therefore, CAVEMAN predictions are used as 'data' for calibration purposes in this study. (Munson 1998) The parameter values are assumed to be the same as the WIPP salt values or adjusted from the WIPP salt value in proportion to the A 2 value obtained experimentally for Bayou Choctaw salt a A 2 multiplication factor to examine the A 2 factor effect b K 0 multiplication factor to examine the K 0 factor effect …”

Section: Cavemanmentioning

confidence: 99%

“…Because all of the creep tests were conducted at relatively low stress and low temperature, the creep in terms of the structure factor of just one of the three mechanisms involved in salt creep can be characterized. This is the undefined or empirical mechanism with the structure factor A 2 (Munson 1998). Equation (3) represents the strain rate for an empirically specified but undefined mechanism at low temperatures and low stresses.…”

Section: Baselinementioning

confidence: 99%

See 4 more Smart Citations

Geomechanical Model Calibration Using Field Measurements for a Petroleum Reserve

2018

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A finite element numerical analysis model has been constructed that consists of a mesh that effectively captures the geometries of Bayou Choctaw (BC) Strategic Petroleum Reserve (SPR) site and multimechanism deformation (M-D) salt constitutive model using the daily data of actual wellhead pressure and oil-brine interface location. The salt creep rate is not uniform in the salt dome, and the creep test data for BC salt are limited. Therefore, the model calibration is necessary to simulate the geomechanical behavior of the salt dome. The cavern volumetric closures of SPR caverns calculated from CAVEMAN are used as the field baseline measurement. The structure factor, A 2 , and transient strain limit factor, K 0 , in the M-D constitutive model are used for the calibration. The value of A 2 , obtained experimentally from BC salt, and the value of K 0 , obtained from Waste Isolation Pilot Plant salt, are used for the baseline values. To adjust the magnitude of A 2 and K 0 , multiplication factors A 2 F and K 0 F are defined, respectively. The A 2 F and K 0 F values of the salt dome and salt drawdown skins surrounding each SPR cavern have been determined through a number of back analyses. The cavern volumetric closures calculated from this model correspond to the predictions from CAVEMAN for six SPR caverns. Therefore, this model is able to predict behaviors of the salt dome, caverns, caprock, and interbed layers. The geotechnical concerns associated with the BC site from this analysis will be explained in a follow-up paper.

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Section: Saltmentioning

confidence: 99%

Section: Footnote 3 (Continued)mentioning

confidence: 99%

Section: Footnote 3 (Continued)mentioning

confidence: 99%

Section: Cavemanmentioning

confidence: 99%

Section: Baselinementioning

confidence: 99%

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Geomechanical Model Calibration Using Field Measurements for a Petroleum Reserve

2018

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A New Elasto-Viscoplastic Damage Model Combined with the Generalized Hoek–Brown Failure Criterion for Bedded Rock Salt and its Application

Liu

Fang

et al. 2012

Rock Mech Rock Eng

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Interbed Modeling to Predict Wellbore Damage for Big Hill Strategic Petroleum Reserve

Park

2014

Rock Mech Rock Eng

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Oil leaks were found in wellbores of Caverns 105 and 109 at the Big Hill Strategic Petroleum Reserve site. According to the field observations, two instances of casing damage occurred at the depth of the interbed between the caprock bottom and salt top. A three-dimensional finite element model, which allows each cavern to be configured individually, was constructed to investigate horizontal and vertical displacements in each well as it crosses the various interbeds. The model contains interfaces between each lithology and a shear zone (fault) to examine the interbed behavior in a realistic manner. This analysis results indicate that the casings of Caverns 105 and 109 failed, respectively, from shear stress that exceeded the casing shear strength due to the horizontal movement of the salt top relative to the caprock and tensile stress due to the downward movement of the salt top from the caprock. The wellbores of Caverns 114 and 104, located at the far end of the field and near the fault, respectively, are predicted to fail by shear stress in the near future. The wellbores of inmost Caverns 107 and 108 are predicted to fail by tensile stress in the near future. The salt top subsides because the volumes of caverns in the salt dome decrease with time due to salt creep closure, while the caprock does not subside at the same rate as the salt top because the caprock is thick and stiff. This discrepancy yields deformation of the well.

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Analysis of Multistage and Other Creep Data for Domal Salts

Cited by 24 publications

References 2 publications

Geomechanical Model Calibration Using Field Measurements for a Petroleum Reserve

Geomechanical Model Calibration Using Field Measurements for a Petroleum Reserve

A New Elasto-Viscoplastic Damage Model Combined with the Generalized Hoek–Brown Failure Criterion for Bedded Rock Salt and its Application

Interbed Modeling to Predict Wellbore Damage for Big Hill Strategic Petroleum Reserve

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