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Pore fluid effects on rock mechanics

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Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0005
... numerical analysis will the realistic spatial distribution of rock inclusions (i.e., (a) enhance reliable assessments of effective rock fabrics), dynamic fluid flow, pore pressure, and elastic/mechanical properties of carbonates or any other pore structure. rock type in the presence of pore pressure...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201380-MS
... components and perform mechanical homogenization. Such approaches often only take into account the volumetric concentrations of rock components within the elastic deformation regime, regardless of their spatial distribution. They also overlook the effects of dynamic fluid flow and pore pressure on mechanical...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0895
... and results in overpressure. Alternatively, thermal expansion of fluids can cause pressure to increase in a closed pore. Effective compliance due to this mechanism can be described using equation 7. Note that the microstructure of rocks evolves with the geological processes. For example, an exponential Page...
Proceedings Papers

Paper presented at the 2011 SEG Annual Meeting, September 18–23, 2011
Paper Number: SEG-2011-2140
... rock samples can be determined computationally (Saenger et al. 2009). Therefore, computer simulations can provide a combined estimate of transport and viscous pore fluid dependent mechanical properties for exactly the same structure. Gurevich (2002) reported that it is generally believed...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 23–25, 2018
Paper Number: URTEC-2883153-MS
..., Biot coefficient, and leak-off coefficient. Previous modeling studies mainly focus on the effects of in-situ stresses, rock mechanical properties, and injected fluid properties on hydraulic fracture behavior. However, there remains a distinct lack of studies on the effects of pore pressure and rock...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-031
... formation annular pressure drilling viscosity mud loss drilling fluid density permeability fluid dynamics fracture aperture eurock 2020 ballooning pore pressure severe breathing effect society of petroleum engineers © International Society for Rock Mechanics and Rock Engineering Norwegian...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1947
... investigates the effect of pore water pressure on rock erosion performance. The results are in good agreement with experimental results. hydraulic fracturing element formulation back pressure sandstone Reservoir Characterization fluid modeling equation of state Upstream Oil & Gas rock...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-093
... spaces. Each pore space can store pore pressure. The previous studies focused on the effect of the injection pressure of pores in rock. In contrast, the aim of this study is to modify the fluid flow algorithm and merge it with the PIM to simulate fluid transmission along a fracture. Fig. 1 Fluid flow...
Proceedings Papers

Paper presented at the 2007 SEG Annual Meeting, September 23–28, 2007
Paper Number: SEG-2007-1584
... the absence of chemical interactions between the rock matrix and the pore fluid. Less is known about the effects of chemical processes on the elastic properties. Chemical processes may create secondary porosity (e.g. dissolution mechanisms), cause mineral transformation (e.g. hydrated mineral phases...
Proceedings Papers

Paper presented at the Offshore Technology Conference Asia, March 20–23, 2018
Paper Number: OTC-28231-MS
.... 6 OTC-28231-MS Table 1 The pore pressure profile and overpressure mechanism based on Sonic Velocity Effective Stress cross-plots of wells in study area. Abnormal Pressure Well Name Normal Pressure Disequilibrium compaction Fluid expansion MRI 1 Determined Determined Not Determined MRI 2 Determined...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0371
... to be caused by the different pore pressures that developed in the rock matrix, which resulted from the significantly distinct fluid fronts observed for the two injection rates tested. Reservoir Characterization Upstream Oil & Gas pore pressure specimen hydraulic fracturing fluid front fluid...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1451
... fluid and rock under normal conditions. The yellow part is more accurate for the prediction of abnormal high pressure in this block. Li et al. (2020) established effective of Fig. 1(a) is the rock matrix, and the blue part is the pore stress curves for illite-montmorillonite transformation under...
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-10-117
.... In this paper, we review the evidence that behavior of porous rocks is pore fluid dependent, and present a constitutive model for pore fluid dependent porous rocks. Our review indicates that theories of Unsaturated Soil Mechanics (USM) are not fully applicable to the modeling of the effects of pore fluid...
Proceedings Papers

Paper presented at the ISRM 2nd International Conference on Rock Dynamics, May 18–19, 2016
Paper Number: ISRM-ROCDYN-2016-43
... of rock mechanics, three fundamental mechanisms are summarized, i.e., the increase of pore pressure, the change of stress, and the change of frictional coefficient. The stimulation of reservoir-related earthquakes and earthquakes induced by fluid injection are sufficiently interpreted by a Coulomb-Mohr...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1836
... to model fracturing in geomaterials. However, modelling this process in standard FEM is a challenging task as the rock deformation and pore fluid pressures are coupled, it involves a lot more degrees of freedom per node compared to a deformation analysis of dry rock. On the other hand, fracture propagation...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1766
... as the ratio of the induced pore pressure to the change of Eq. (8) shows that the B-value, considering both the isotropic compression: compressibility of the rock matrix and the fluid, may be significantly smaller than one because K is comparable to B = u = 1 (3) Kf, and Ks is larger than K and Kf. c 1 + n...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-229
... ultrasonic monitoring can be used to detect the advancement of the fluid front within the rock pore space. Introduction To assess water-weakening effects in reservoir rocks, previous experimental studies have focused on changes in the failure envelopes derived from mechanical tests conducted on rocks...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1256
... of the rock, the pore fluids do not flow, so the effect of the flow can be ignored. In this paper, the pore fluids are water and oil. In the reservoir, the content of water and oil would change with long-term production and injection. Strengths and elastic parameters will change with the content of water...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1810
... and plastic mechanics, and of pressure in fracture required for propagation was given considering the characteristics of reservoir lithology, (Huang,1982). And, the rock strength is considered to be natural fractures, and stress distribution. However, the one of the main factors affecting fracture growth pore...
Proceedings Papers

Paper presented at the ISRM Rock Dynamics Summit, May 7–11, 2019
Paper Number: ISRM-RDS-2019-014
... a key role in activating of geological faults at a wide range of scale. One of the main factors causing the fault reactivation is increases in pore fluid pressure which generally decreases in effective stress and shear strength. Pore pressure-induced dynamic strains could change mechanical conditions...

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