Impact of rock salt creep law choice on subsidence calculations for hydrocarbon reservoirs overlain by evaporite caprocks

G. Marketos; C. J. Spiers; R. Govers

doi:10.1002/2016jb012892

Impact of rock salt creep law choice on subsidence calculations for hydrocarbon reservoirs overlain by evaporite caprocks

Journal of Geophysical Research Solid Earth ◽

10.1002/2016jb012892 ◽

2016 ◽

Vol 121 (6) ◽

pp. 4249-4267 ◽

Cited By ~ 3

Author(s):

G. Marketos ◽

C. J. Spiers ◽

R. Govers

Keyword(s):

Rock Salt ◽

Hydrocarbon Reservoirs ◽

Salt Creep

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Analysis of Casing Strength after Casing Wear in Ultra-Deep Rock Salt Formation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.616-618.538 ◽

2012 ◽

Vol 616-618 ◽

pp. 538-542 ◽

Cited By ~ 2

Author(s):

Fu Xiang Zhang ◽

Wei Feng Ge ◽

Xiang Tong Yang ◽

Wei Zhang ◽

Jian Xin Peng

Keyword(s):

Rock Salt ◽

Coupling Effect ◽

Equivalent Stress ◽

Horizontal Stress ◽

In Situ Stress ◽

Attrition Rate ◽

Salt Formation ◽

Salt Creep ◽

Casing Wear

To alleviate the problems of casing collapse induced by the coupling effect of rock salt creep and casing wear, the effects of salt creep, attrition rate and casing abrasive position on the equivalent stress on casings in non-uniform in-situ stress field is analyzed by finite-difference model with worn casing, cement and salt formation. It indicates that, creep reduces the yield strength of worn casing to a certain extent; Equivalent stress on casings is bigger and more non-uniform when the abrasion is more serious; Wear position obviously changes the distribution of equivalent stress on casing, and when the wear located along the direction of the minimum in-situ stress, equivalent stress on casing could be the largest that leads to the casing being failed more easily. Equivalent stress on casings increases gradually with creep time increasing and will get to balance in one year or so; In addition, new conclusions are obtained which are different from before: the maximum equivalent stress on casings is in the direction of the minimum horizontal stress, only when the attrition rate of the casing is little; otherwise, it is not. This method could help to improve the wear prediction and design of casings.

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A Nonlinear Creep Model of Rock Salt and Its Numerical Implement in FLAC3D

Advances in Materials Science and Engineering ◽

10.1155/2015/285158 ◽

2015 ◽

Vol 2015 ◽

pp. 1-8 ◽

Cited By ~ 6

Author(s):

Xinrong Liu ◽

Xin Yang ◽

Junbao Wang

Keyword(s):

Numerical Simulation ◽

Rock Salt ◽

Creep Model ◽

Secondary Development ◽

Nonlinear Creep ◽

Creep Properties ◽

Long Term Stability ◽

Creep Characteristics ◽

Salt Creep

Creep characteristics are integral mechanical properties of rock salt and are related to both long-term stability and security of rock salt repository. Rock salt creep properties are studied in this paper through employing combined methods of theoretical analysis and numerical simulation with a nonlinear creep model and the secondary development in FLAC3Dsoftware. A numerical simulation of multistage loading creep was developed with the model and resulting calculations were found consequently to coincide with previously tested data.

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