Experimental study on relationship between fracture propagation and pumping parameters under constant pressure injection conditions

Zhao, Yu; Zhang, Yongfa; Yang, Haiqing; Liu, Qiang; Tian, Guodong

doi:10.1016/j.fuel.2021.121789

Cited by 55 publications

(18 citation statements)

References 59 publications

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“…The fracturing fluid pumping rate (Q) will significantly affect the fluid pressure distribution in hydraulic fractures, thus changing the characteristics of fracture propagation [30,31]. The pumping rate is the most important controllable parameter in hydraulic fracturing design.…”

Section: Influence Of Fracturing Fluid Pumping Ratementioning

confidence: 99%

Multi-Fracture Synchronous Propagation Mechanism of Multi-Clustered Fracturing in Interlayered Tight Sandstone Reservoir

Tian

Yan

Jin³

et al. 2022

Sustainability

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A numerical model was established by using the 3D lattice method to investigate the synchronous propagation mechanism of multiple clusters of hydraulic fractures in interlayered tight sandstone reservoirs in the Songliao Basin in China. The multi-fracture synchronous propagation model under different geological factors and fracturing engineering factors was simulated. The results show that the vertical stress difference, interlayer Young’s modulus, and lithologic interface strength are positively correlated with the longitudinal propagation ability of multiple hydraulic fractures. The three clusters of hydraulic fractures can have adequate longitudinal extension capacity and transverse propagation range with 15 m cluster spacing and a 12 m3/min pumping rate. The viscosity of the fracturing fluid is positively correlated with the ability of hydraulic fracture to penetrate the interlayer longitudinally but negatively correlated with the transverse propagation length. It is recommended that high viscosity fracturing fluid is used in the early stage of multi-clustered fracturing in interlayered tight sandstone reservoirs to promote hydraulic fractures to penetrate more interlayers and communicate more pay layers in the longitudinal direction, and low viscosity fracturing fluid in the later stage to make multiple clusters of fractures propagate to the far end where possible and obtain a more ideal SRV.

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Section: Influence Of Fracturing Fluid Pumping Ratementioning

confidence: 99%

Multi-Fracture Synchronous Propagation Mechanism of Multi-Clustered Fracturing in Interlayered Tight Sandstone Reservoir

Tian

Yan

Jin³

et al. 2022

Sustainability

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“…Soft rock crack initiation, propagation, and coalescence are complex physical, chemical, and mechanical water-rock interaction processes [9][10][11][12], which are closely related to mineral composition, mesostructure, and stress state [13][14][15]. Mineral dissolution and water absorption swelling are important causes of crack initiation and propagation of soft rock [16][17][18]. In addition, the primary joints and fissures provide a convenient channel for the water-rock reaction, which promotes crack propagation and coalescence [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Evolution Mechanism of Mesocrack and Macrocrack Propagation in Carbonaceous Mudstone under the Action of Dry-Wet Cycles

Huang

Liang

et al. 2022

Geofluids

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The crack propagation evolution of carbonaceous mudstone under the action of dry-wet cycles is an important cause of the unstable failure of this type of slope. This paper attempts to reveal the evolution mechanism of mesocrack and macrocrack propagation in carbonaceous mudstone under the action of dry-wet cycles from chemical, physical, and mechanical perspectives. Firstly, the soaking solution of carbonaceous mudstone during the dry-wet cycles was extracted for an ion concentration test to analyze the chemical reactions of carbonaceous mudstone. Then, CT scans were performed on the carbonaceous mudstone samples to study the changing pattern of mesostructure of carbonaceous mudstone during the dry-wet cycles. In the end, the mechanical properties and failure characteristics of carbonaceous mudstone after dry-wet cycles were studied by triaxial compression tests. The results showed that chemical reactions such as calcite dissolution, potassium feldspar hydrolysis, and sodium feldspar hydrolysis occurred during the dry-wet cycle of carbonaceous mudstone. Affected by the dry-wet cycles, the mesostructure of the carbonaceous mudstone gradually changed from face-face contact and edge-face contact to edge-corner contact and corner-corner contact, and the interlayer flake structure was opened and was locally curled and fractured. With the increase in the number of dry-wet cycles, the failure characteristic of carbonaceous mudstone transformed from tensile failure to shear failure, the failure surface of carbonaceous mudstone was deflected from 90° to 60°, and the crack propagation path of carbonaceous mudstone became more complicated. The chemical reaction of carbonaceous mudstone minerals during the dry-wet cycle is an important reason for the initiation and development of pores. The dry-wet cycle aggregates the propagation of mesocracks and structural disorder, transforming the uniform stress state of the rock mesostructure to the concentrated stress state, which is the important reason for the macrocrack propagation evolution of carbonaceous mudstone.

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“…To improve the flow state of water in the spillway in the paper, a ladder-shaped spillway is proposed for optimization and redesign. Based on the relevant standards and requirements [23,24], a hydraulic simulation model is established and the hydraulic characteristics of the optimized scheme are simulated under different cases [25,26], resulting in a stable flow state of water in the optimized model and a good energy dissipation rate at the downstream chute [27,28].…”

Section: Introductionmentioning

confidence: 99%

The Experimental Investigation of the Optimization of the Flow State of a Ladder-Shaped Spillway in a Certain Reservoir

Zhang

et al. 2022

Geofluids

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The original design scheme of ladder-shaped spillways in certain reservoirs is improved by using a hydraulic similar model experiment. The results of the original scheme demonstrate that the stilling basin cannot meet the requirement of safe discharge, and the flow state at the end of the stilling basin is violent and chaotic. The experimental method of the physical model was used to optimize the design of the spillway without changing the original plane layout. First, three steps in the ladder are added. The stilling basin is then replaced by the torsion plane. Finally, the longitudinal slope of the tail channel section is altered, and an experimental investigation on the flow state and energy dissipation rate is performed. The conclusions are drawn that the flow state of the water is obviously improved, and the energy dissipation rate increases; the optimal scheme produces the expected effects.

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Experimental study on relationship between fracture propagation and pumping parameters under constant pressure injection conditions

Cited by 55 publications

References 59 publications

Multi-Fracture Synchronous Propagation Mechanism of Multi-Clustered Fracturing in Interlayered Tight Sandstone Reservoir

Multi-Fracture Synchronous Propagation Mechanism of Multi-Clustered Fracturing in Interlayered Tight Sandstone Reservoir

Evolution Mechanism of Mesocrack and Macrocrack Propagation in Carbonaceous Mudstone under the Action of Dry-Wet Cycles

The Experimental Investigation of the Optimization of the Flow State of a Ladder-Shaped Spillway in a Certain Reservoir

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