Experimental Investigation on the Time Dependent Behaviour of a Multiphase Chalk

Priol, G.; Gennaro, Vincenzo De; Delage, Pierre; Servant, Thibaut

doi:10.1007/3-540-69873-6_15

Cited by 13 publications

(19 citation statements)

References 12 publications

(6 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effects of the oil-water suction on the time dependent behaviour of reservoir chalks has only been partially explored up to now. In this regard, recent findings (Priol, 2005;Priol et al, 2007) from oedometer tests carried out on chalk samples seem to suggest that the delayed strain of chalk is well correlated with the over-stress ratio (i.e. the ratio between the actual stress and the yield stress).…”

Section: Introductionmentioning

confidence: 93%

“…where e is the void ratio, e oi the initial void ratio, t the time, β i a coefficient accounting for the instantaneous (Priol et al, 2007). (Priol et al, 2007).…”

Section: Experimental Evidence Of Creep In Chalkmentioning

confidence: 99%

“…In order to link more directly the parameters to experimental measurement the results of CRS (Constant Rate of Strain) oedometer compression tests at different strain rates and suction (water or oil saturated, 200 kPa suction and dry samples) are first analysed (Priol, 2005;Priol et al, 2007). It was observed that for a given suction the yield limit (i.e.…”

Section: Assessment Of the Viscous Parametersmentioning

confidence: 99%

“…Priol (2005) and Priol et al (2007) reported results of oedometer compression tests carried out on Lixhe chalk (an outcrop chalk from Belgium) saturated with oil, with water, partially saturated and dry (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

“…A modified Pasachalk model was proposed to account for time effects using the framework of Perzyna's viscoplasticity (1964) but without considering suction effects. Based on available experimental results (Priol et al, 2007), a modified version of the viscoplastic Pasachalk model including suction effects is proposed in this paper. …”

mentioning

confidence: 99%

See 4 more Smart Citations

An elasto-viscoplastic model for chalk including suction effects

Collin¹,

Gennaro²,

Delage³

et al. 2008

Unsaturated Soils. Advances in Geo-Engineering

View full text Add to dashboard Cite

During the six years long Pasachalk project devoted to the mechanical behaviour of high porosity chalks from North Sea oilfields, the constitutive model Pasachalk (Collin et al., 2002) was proposed based on the Barcelona Basic Model (BBM) (Alonso et al., 1990). The approach was based on the similarities found between the oil-water interactions (oil and water being the non wetting and wetting fluid respectively) in oil reservoir chalk and the air-water interactions in unsaturated soils. This approach appeared to be relevant to interpret the subsidence of the seafloor during waterflooding operations for enhanced oil recovery that has been observed in North Sea oilfields (e.g. Ekofisk oilfield). Another important component of subsidence was then related to the creep behaviour of the multiphase chalk (De Gennaro et al., 2003). A modified Pasachalk model was proposed to account for time effects using the framework of Perzyna's viscoplasticity (1964) but without considering suction effects. Based on available experimental results (Priol et al., 2007), a modified version of the viscoplastic Pasachalk model including suction effects is proposed in this paper.

show abstract

Section: Introductionmentioning

confidence: 93%

“…where e is the void ratio, e oi the initial void ratio, t the time, β i a coefficient accounting for the instantaneous (Priol et al, 2007). (Priol et al, 2007).…”

Section: Experimental Evidence Of Creep In Chalkmentioning

confidence: 99%

Section: Assessment Of the Viscous Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

An elasto-viscoplastic model for chalk including suction effects

Collin¹,

Gennaro²,

Delage³

et al. 2008

Unsaturated Soils. Advances in Geo-Engineering

View full text Add to dashboard Cite

show abstract

A viscoplastic constitutive model for unsaturated soils based on nonstationary flow surface theory

Wang,

Cui

2023

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

A viscoplastic constitutive model is developed to describe the viscoplastic behavior of unsaturated soils. The proposed model accounts for the stain‐rate and suction effects on yield by adopting an unsaturated isotach concept. The nonstationary flow surface theory (NSFS) is applied for modeling the viscoplastic behavior, with the yield surface which can evolve with the viscoplastic strain, viscoplastic strain rate and suction. Meanwhile, the progressively hardening concept is adopted for reproducing the viscoplastic behavior of soil at an over‐consolidated state. For the validation, a series of loading conditions are considered based on the data from the literature. Results show that the proposed model is able to reproduce the main viscoplastic behaviors of unsaturated highly compacted Gaomiaozi (GMZ) bentonite, Glenroy silt and Qianjiangping landslide (QL) soil, including CRS compression tests, rate‐dependent triaxial shear tests, and triaxial creep tests.

show abstract

The UTUH model: a time-dependent unified hardening constitutive model for unsaturated soils

Zhao,

Zhou,

Yao

2023

Acta Geotech.

View full text Add to dashboard Cite

An advanced constitutive framework for unsaturated soils, the UTUH model, is proposed in this paper, which considers the joint effect of time, suction and overconsolidation within the framework of sub-loading surface plasticity. A reference line, namely the instantaneously normal compression line (INCLs) for unsaturated soils, is introduced from a conceptual framework drawn from constant rates of strain test results to determine creep time and overconsolidation states of unsaturated soils. Subsequently, an isotropic elasto-viscoplastic constitutive model for unsaturated soils is produced by combining viscous deformation with mechanical and hydraulic deformation through overconsolidation parameter. Net stress, suction and time are adopted as fundamental constitutive variables and time-dependent loading collapse yield surface is derived to characterize the relationship between yield stress, suction, and time. Then, an extension to a triaxial stress state is built in the space of mean effective stress, suction, deviator stress and time variable. The hardening of yield surface and sub-loading surface is controlled by viscoplastic volumetric strain and unified hardening parameter. The performance of the proposed UTUH model is addressed through four numerical studies, and the proposed model is validated against experimental data from the literature.

show abstract

Experimental Investigation on the Time Dependent Behaviour of a Multiphase Chalk

Cited by 13 publications

References 12 publications

An elasto-viscoplastic model for chalk including suction effects

An elasto-viscoplastic model for chalk including suction effects

A viscoplastic constitutive model for unsaturated soils based on nonstationary flow surface theory

The UTUH model: a time-dependent unified hardening constitutive model for unsaturated soils

Contact Info

Product

Resources

About