Experimental investigation of hydraulic fracture propagation in fractured blocks
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| 024 | 7 | 0 | |a 10.1007/s10064-014-0665-x |2 doi |
| 035 | |a (NATIONALLICENCE)springer-10.1007/s10064-014-0665-x | ||
| 245 | 0 | 0 | |a Experimental investigation of hydraulic fracture propagation in fractured blocks |h [Elektronische Daten] |c [Ali Dehghan, Kamran Goshtasbi, Kaveh Ahangari, Yan Jin] |
| 520 | 3 | |a 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 Δσ, which were 5 and 10MPa, 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 10MPa, respectively. It was observed that both the magnitude of differential stress and the pre-existing fracture geometry can magnify the effect of a pre-existing fracture on hydraulic fracture propagation. When the horizontal differential stress is low (5MPa), 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 (10MPa), when the pre-existing 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. | |
| 540 | |a Springer-Verlag Berlin Heidelberg, 2014 | ||
| 690 | 7 | |a Hydraulic fracture propagation |2 nationallicence | |
| 690 | 7 | |a Laboratory experiments |2 nationallicence | |
| 690 | 7 | |a The pre-existing fracture strike and dip |2 nationallicence | |
| 690 | 7 | |a Horizontal stress difference |2 nationallicence | |
| 690 | 7 | |a μ : Fluid viscosity, m/Lt (Pas) |2 nationallicence | |
| 690 | 7 | |a σ h : Minimum principal stress in horizontal direction, m/Lt2 (Pa) |2 nationallicence | |
| 690 | 7 | |a σ H : Maximum principal stress in horizontal direction, m/Lt2 (Pa) |2 nationallicence | |
| 690 | 7 | |a σ v : Principal stress in vertical direction, m/Lt2 (Pa) |2 nationallicence | |
| 690 | 7 | |a ∆σ : Horizontal stress difference, m/Lt2 (Pa) |2 nationallicence | |
| 690 | 7 | |a p : Fluid pressure, m/Lt2 (psi) |2 nationallicence | |
| 690 | 7 | |a q : Flow rate of fluid, L3/t (m3/s) |2 nationallicence | |
| 690 | 7 | |a E : Young's modulus of elasticity, m/Lt2 (Pa) |2 nationallicence | |
| 690 | 7 | |a $$ \nu $$ ν : Poisson's ratio |2 nationallicence | |
| 690 | 7 | |a σ c : Unconfined compressive strength, m/Lt2 (Pa) |2 nationallicence | |
| 690 | 7 | |a T 0 : Tensile strength, m/Lt2 (Pa) |2 nationallicence | |
| 690 | 7 | |a k : Permeability, L2 (m2) |2 nationallicence | |
| 690 | 7 | |a ϕ : Porosity (%) |2 nationallicence | |
| 690 | 7 | |a α : Angle of the dip, angle (°) |2 nationallicence | |
| 690 | 7 | |a β : Angle of the strike, angle (°) |2 nationallicence | |
| 690 | 7 | |a $$ U_{\text{m}}^{i} $$ U m i : Maximum allowable closure for load cycle i, L (mm) |2 nationallicence | |
| 690 | 7 | |a U n : Current normal displacement, L (mm) |2 nationallicence | |
| 690 | 7 | |a K n0 : Initial normal stiffness, m/L2 t2 (Pa/mm) |2 nationallicence | |
| 690 | 7 | |a σ n : Confining stress, m/Lt2 (Pa) |2 nationallicence | |
| 700 | 1 | |a Dehghan |D Ali |u Department of Mining Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran |4 aut | |
| 700 | 1 | |a Goshtasbi |D Kamran |u Department of Mining Engineering, Tarbiat Modares University, Tehran, Iran |4 aut | |
| 700 | 1 | |a Ahangari |D Kaveh |u Department of Mining Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran |4 aut | |
| 700 | 1 | |a Jin |D Yan |u Faculty of Petroleum Engineering, China University of Petroleum, Beijing, China |4 aut | |
| 773 | 0 | |t Bulletin of Engineering Geology and the Environment |d Springer Berlin Heidelberg |g 74/3(2015-08-01), 887-895 |x 1435-9529 |q 74:3<887 |1 2015 |2 74 |o 10064 | |
| 856 | 4 | 0 | |u https://doi.org/10.1007/s10064-014-0665-x |q text/html |z Onlinezugriff via DOI |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 900 | 7 | |a Metadata rights reserved |b Springer special CC-BY-NC licence |2 nationallicence | |
| 908 | |D 1 |a research-article |2 jats | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-springer | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1007/s10064-014-0665-x |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Dehghan |D Ali |u Department of Mining Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Goshtasbi |D Kamran |u Department of Mining Engineering, Tarbiat Modares University, Tehran, Iran |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Ahangari |D Kaveh |u Department of Mining Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Jin |D Yan |u Faculty of Petroleum Engineering, China University of Petroleum, Beijing, China |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Bulletin of Engineering Geology and the Environment |d Springer Berlin Heidelberg |g 74/3(2015-08-01), 887-895 |x 1435-9529 |q 74:3<887 |1 2015 |2 74 |o 10064 | ||