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2 edition of Poroelastic effects and influence of material interfaces on hydraulic fracture behaviour. found in the catalog.

Poroelastic effects and influence of material interfaces on hydraulic fracture behaviour.

Jose Luis Carvalho

Poroelastic effects and influence of material interfaces on hydraulic fracture behaviour.

by Jose Luis Carvalho

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  • 36 Currently reading

Published .
Written in English


The Physical Object
Pagination[121] leaves
Number of Pages121
ID Numbers
Open LibraryOL18084455M

The impact of formation plastic properties on fracture process is investigated for both short term and long term injection and the results are compared with elastic formation. In addition, the main factors that affect the poroelastic backstress and the effects of formation plasticity on a hydraulic fracture . energies Article The Behaviour of Fracture Growth in Sedimentary Rocks: A Numerical Study Based on Hydraulic Fracturing Processes Lianchong Li 1,*, Yingjie Xia 2, Bo Huang 3, Liaoyuan Zhang 3, Ming Li 3 and Aishan Li 3 1 School of Civil Engineering, Dalian University of Technology, Dalian , China 2 State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology.

effect of fracture toughness ignored. A modified leak-off In this paper we investigate the influence of angle of approach, diff stress state and natural fracture properties on interaction between pre-existing natural fractures and induced hydraulic fracture based on poroelastic environment. A two dimensional numerical model was. The effective fracture toughness is calculated using a fully deterministic elasto-plastic hydraulic fracturing model. Rock is modelled by Mohr–Coulomb flow theory of plasticity for cohesive-frictional dilatant material. Fluid flow is modelled by lubrication theory.

Vertical Hydraulic Fracture Problem. The test case (Fig. 10) that is used here is very similar to the previous KGD problem, but an initial crack is placed at the bottom of the model, to model the vertical fracture growth representative of the hydraulic fractures. The model is . Lin Ni, Xue Zhang, Liangchao Zou, Jinsong Huang, Phase-field modeling of hydraulic fracture network propagation in poroelastic rocks, Computational Geosciences, /s .


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Poroelastic effects and influence of material interfaces on hydraulic fracture behaviour by Jose Luis Carvalho Download PDF EPUB FB2

The natural fractures have a spacing of 3 m and an aperture of ×10 −5 m. The vertical hydraulic fracture is considered to be at a depth of m in an in-situ stress field of σ v = MPa, σ h min = MPa, σ h max = MPa, and a pore pressure of p = by:   Savitski and Detournay () derived solutions for a penny-shaped hydraulic fracture in an impermeable elastic rock.

They defined three hydraulic fracturing variables, fracture aperture a f, fracture net pressure p fnet, and fracture radius R f, as functions of the dimensionless parameters Ω, Π and γ, as: (33) a f = ɛ L Ω (34) p f = ɛ E ′ Π (35) R f = L γ where ε is a small number Cited by:   Poroelastic Effects in the Hydraulic Fracturing influence of the pore pressure on the stresses, etc.

In the talk we present our recent development in the modelling of the hydraulic fracture dynamics in a poroelastic medium. The topics include: a numerical algorithm for a simulation of the planar hydraulic fracture propagation in the Biot Author: Sergey V.

Golovin, Alexey N. Baykin, Alexander V. Valov. Hydraulic fracturing is the process of creating a fracture due to pumping a highly pressurized fluid in a rock formation through a wellbore that is used for intensification of hydrocarbon production. This study investigates, by performing finite element-based simulations, the influence of fluid leak-off and poroelasticity on growth of multiple hydraulic fractures that initiate from a single.

Regarding a hydraulic fracture in a layered rock system, previous studies (e.g., Li et al., ) have shown that the fracture propagation is affected by its incident height (h i) and incident angle (θ i), which are defined in Fig.

A series of FEM simulations using the PHF model is conducted to investigate the effect of h i and θ i by modeling the fracture propagation in a layered rock. Many numerical models have been presented to study the interaction of a hydraulic fracture, its surrounding area and other hydraulic and natural fractures in a poroelastic medium.

Many of these models ignore or simplify the effect of pore pressure/stress coupling as well as the fracture geometry and fluid flow within the fracture.

Based on the previous studies [20,24,26,27], we present in this paper the primary results concerning the poroelastic effects on the time- and rate-dependent fracture of polymer gels, including both delayed fracture and steady-state crack particular, the modified J-integral method is emphasized (Sec.

2) as an effective approach for calculating the crack-tip energy release rate as the. A fully coupled poroelastic hydraulic fracture model is used to account for pore pressure and stress changes due to production. To ease the computational cost of a simulator, we also provide reduced-order models (ROMs), which can be used to replace the complex numerical model with a rather simple analytical model, for calculating the pore.

Hydraulic fracturing is an effective method for developing unconventional reservoirs. The fracture height is a critical geometric parameter for fracturing design but will be limited by a weak interface. Fracture containment occurs when fracture propagation terminates at layer interfaces that are weaker than the surrounding rock.

It always occurs in multilayer formation. hydraulic fractures and joints. A hydraulic fracture usually is pressurized in excess of the minimum in-situ stress and remains open during the loading process, which means both the normal and shear stiffness of the fracture are zero.

On the hydraulic fracture surface, the normal tractions equal the fluid pressures in the fracture and the shear. Poroelastic Effects on Fracture Characterization. The duration and magnitude of the response reflects the poromechanical properties of the fractured host rock and hydraulic properties of the pumped fracture.

An axisymmetric flow and deformation model were developed using Biot2 in an effort to simulate the observed water‐level response.

Poroelastic and Poroplastic Modeling of Hydraulic Fracturing in Brittle and Ductile Formations* HanYi Wang, The University of Texas at Austin, Matteo Marongiu-Porcu, Schlumberger, Michael ides, University of Houston Summary The prevailing approach for hydraulic fracture modeling relies on Linear Elastic Fracture Mechanics (LEFM).

Generally. In this research, poroelastic deformation of the matrix is coupled with fluid flow in the fractures, and fluid flow in the rock matrix, in three dimensions.

Effects of the fluid leakoff and poroelasticity on the propagation of the neighboring fractures are studied by varying the.

the poroelastic effects are essential in case of the hydraulic fracturing process. In present work we investigate this subject using numerical analysis. We consider the model of radial hydraulic fracture in a poroelastic medium constructed similarly to one in plane strain case [1].

The model makes it possible to. Fig. 7 shows the fracture geometry in poro-viscoelastic material compared to that in poroelastic material. The evolution of crack inlet width has a sharp jump followed by a fall and then to a steady growth state, as shown in Fig.

7 (a). The initial soar of width is due to accumulated pressure in the crack. Request PDF | Dynamic interface behaviour of a bi-material poroelastic cracked plate | The interface fracture behaviour of a bi-material poroelastic plate with normal to the interface surface.

The hydraulic fractures' growth in the reservoir scale is then simulated, in which the effect of fluid viscosity, natural fracture characteristics and differential stresses on induced fracture. Furthermore, it is also found that the diffusion process that is a major mechanism in hydraulic fracture operations influences further the obtained results on the fracture dimensions, plastic.

It is then shown that the reservoir history as well as the percolation occurring prior to hydraulic fracture initiation affects the breakdown pressure value.

Poroelastic models also explain the decrease of propagation pressure with pore pressure, as has been often reported in the field.

influence pumping rate and/or fluid characteristics. To capture the hydraulic fractures in heterogeneous and layered rocks, a numerical code that can consider the coupled effects of fluid flow, damage, and stress field in rocks is presented. Based on the characteristics of a typical thin and inter-bedded sedimentary reservoir, China, a series of simulations on the hydraulic fracturing are performed.

In the simulations, three points, i.e., (1.In this paper, I shall theoretically examine the effects of fracture aperture and fracture roughness on the hydraulic (fluid transport) and mechanical (elastic) response of a fractured rock.

Note that mechanical response includes the stress dependence, which has significant impact on time-lapse seismic monitoring (e.g. Liu et alTod ).The developments in poroelasticity presented by – can therefore be regarded as the representations of displacement, stress and pore pressure fields associated purely with the effects of injection.

The interface between the poroelastic caprock layer and the poroelastic halfspace region is assumed to be contiguous thereby allowing complete.