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- W4297348705 abstract "ABSTRACT: Laboratory experiments have been carried out to investigate the growth of hydraulic fracture (HF) in an anisotropic rock with pre-existing discontinuities such as bedding planes and veins. The experiments are designed in light of scaling relationships that enable investigation on the impact by the weak mechanical discontinuities on the HF growth under desired regimes (under either a toughness dominated or a lag-viscosity dominated regime based on the scaling analysis). According to our laboratory observations, planar HF growth is promoted in the experiments under the lag-viscosity regime, in which the radial HF is able to cross both the bedding planes and veins. In contrast, profound influence of the weak discontinuities is shown in the toughness dominated experiments, causing the HF to be diverted into, or arrested by the pre-existing weak planes. The test results suggest that the complexity of the fracture path is highly dependent on a dimensionless toughness, Km. This laboratory study highlights the importance of the hydromechanical characteristics in the HF propagation in anisotropic rocks with pre-existing weak discontinuities. 1 INTRODUCTION Weak discontinuities, such as weakly cemented bedding planes, veins, natural fractures, and defects are often encountered in unconventional reservoirs. It has been shown by both laboratory (Suarez-Rivera et al., 2013; Burghardt et al., 2015; Lee et al., 2015; Llanos et al., 2017; Fu et al., 2018; Xing et al., 2018; Lu et al., 2021) and field-scale hydraulic fracturing experiments (Warpinski and Teufel, 1987) that the discontinuities can locally reduce the strength of the rock, and alter the propagation direction of a hydraulic fracture (HF) that is growing towards the planes formed by the discontinuities. Such interaction between the HF and discontinuities can lead to the HF crossing, diverted into, or completely arrested by the pre-existing weak planes." @default.
- W4297348705 created "2022-09-28" @default.
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- W4297348705 date "2022-06-26" @default.
- W4297348705 modified "2023-10-18" @default.
- W4297348705 title "Experimental Investigation of Hydraulic Fracture Growth in an Anisotropic Rock with Pre-Existing Discontinuities Under Different Propagation Regimes" @default.
- W4297348705 doi "https://doi.org/10.56952/arma-2022-0239" @default.
- W4297348705 hasPublicationYear "2022" @default.
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