Experimental Hydraulic Fracture Propagation in a Multi-Fractured Medium

Beugelsdijk, L.J.L.; Pater, C.J. de; Sato, K.

doi:10.2523/59419-ms

Cited by 67 publications

(68 citation statements)

References 12 publications

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“…Experimentally, several researchers [3][4][5][6][7][8][9][10][11][12][13] have widely investigated the problem of hydraulic and natural fractures interaction to improve the success rate and fracturing effect. On the basis of experimental studies, it is conceivable that several events may occur during the period of hydraulic fracture propagation towards the natural fracture and beyond.…”

Section: Introductionmentioning

confidence: 99%

The effect of natural fracture dip and strike on hydraulic fracture propagation

Dehghan

Goshtasbi

Ahangari

et al. 2015

International Journal of Rock Mechanics and Mining Sciences

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Section: Introductionmentioning

confidence: 99%

The effect of natural fracture dip and strike on hydraulic fracture propagation

Dehghan

Goshtasbi

Ahangari

et al. 2015

International Journal of Rock Mechanics and Mining Sciences

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“…A number of experimental studies have been conducted on the interaction between hydraulic fractures and natural fractures (Lamont and Jessen 1963;Daneshy 1974;Blanton 1986;Warpinski and Teufel 1987;Renshaw and Pollard 1995;Beugelsdijk et al 2000;Athavale and Miskimins 2008;Zhou et al 2008Zhou et al , 2011Olson et al 2012;Suarez-Rivera et al 2013). Some of these studies focus on the mechanical interaction when a hydraulic fracture intersects a pre-existing fracture, while others also consider the fluid flow in the hydraulic fracture and natural fractures.…”

Section: Introductionmentioning

confidence: 98%

Experimental investigation of hydraulic fracture propagation in fractured blocks

Dehghan

Goshtasbi

Ahangari

et al. 2014

Bull Eng Geol Environ

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Natural fractures in reservoirs can be the cause of many adverse effects during hydraulic fracturing treatment. In the present paper, hydraulic fracturing tests are used to investigate the interaction of a propagating hydraulic fracture with a natural fracture in the fractured blocks. Systematic experiments were designed and performed on the cement blocks with different pre-existing fracture strikes and dips (30°, 60°and 90°). The effect of horizontal stress difference on the propagation of hydraulic fractures was also determined through a series of experiments with different values for Dr, which were 5 and 10 MPa, respectively. Propagation arrest of the hydraulic fracture and crossing the pre-existing fracture were two dominating fracture behaviors at horizontal stress differences of 5 and 10 MPa, respectively. It was observed that both the magnitude of differential stress and the preexisting fracture geometry can magnify the effect of a preexisting fracture on hydraulic fracture propagation. When the horizontal differential stress is low (5 MPa), the hydraulic fracture crosses the pre-existing fracture at a high pre-existing fracture dip (90°) and at an intermediate to high pre-existing fracture strike (60°-90°), while hydraulic fracture is arrested by the opening of the pre-existing fracture at a pre-existing fracture strike (30°). Meanwhile, when the pre-existing fracture dip is low to intermediate (30°-60°) and its strike is low to high (30°-90°), hydraulic fracture is arrested by the opening and shear slippage of the pre-existing fracture in this situation. However, at a high horizontal differential stress (10 MPa), when the preexisting fracture dip is low to high (30°-90°), the hydraulic fracture crosses the pre-existing fracture at the strike of the pre-existing fracture of 60°-90°, and when it is decreased to 30°, the hydraulic fracture is arrested by th eopening and shear slippage of the pre-existing fracture. Therefore, the pre-existing fracture's strike and dip play a significant role in the propagation of hydraulic fracture at a low horizontal stress difference, while the role of the pre-existing fracture dip at a high horizontal stress difference is less than the pre-existing fracture strike on the propagation of hydraulic fracture. Keywords Hydraulic fracture propagation Á Laboratory experiments Á The pre-existing fracture strike and dip Á Horizontal stress difference List of symbols l Fluid viscosity, m/Lt (Pa s) r h Minimum principal stress in horizontal direction, m/Lt 2 (Pa) r H Maximum principal stress in horizontal direction, m/Lt 2 (Pa) r v Principal stress in vertical direction, m/Lt 2 (Pa) D r Horizontal stress difference, m/Lt 2 (Pa) p Fluid pressure, m/Lt 2 (psi) q Flow rate of fluid, L 3 /t (m 3 /s) E Young's modulus of elasticity, m/Lt 2 (Pa) m Poisson's ratio r c Unconfined compressive strength, m/Lt 2 (Pa)

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“…The condition given in Eq. (7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26) ensures that Eq. (7-60) has a solution for 0 < f L0 < 1.…”

Section: Case 2: No Native Fracture Permeabilitymentioning

confidence: 96%

“…The prediction from the model compares equally well with the available laboratory crossing test results. The model also captures the transitional crossing behavior where higher viscosity fluid and flow rate tend to cause HF crossing NF more easily as observed in the laboratory experiment by Beugelsdijk et al [23] and detailed numerical simulations [34]. In addition to the analytical models, numerical models are also used for simulating the crossing behavior [32,33,38].…”

Section: Introductionmentioning

confidence: 98%

“…A branch-off may occur at an intersection with another fracture, or The HF-NF crossing behavior depends on the in situ stresses, rock and NF properties, frac-fluid property and its injection rate. During the last decades, extensive theoretical and experimental studies [17][18][19][20][21][22][23][24][25][26] have been carried out for developing a rule governing the HF-NF interaction.…”

Section: Introductionmentioning

confidence: 99%

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