Effect of normal load and shearing velocity on the interface friction of organic shale – Proppant simulant

He, Huan; Luo, Lina; Senetakis, Kostas

doi:10.1016/j.triboint.2019.106119

Cited by 18 publications

(4 citation statements)

References 35 publications

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“…For composite interfaces however, recent studies published in the literature show a dependency of μ on the applied normal load; this was reported for both composite interfaces of sand grain sliding on softer FRP (fiber-reinforced polymer) interface by He t al. [77] and proppant (natural particle) sliding on softer shale rock by He and Senetakis [78] and He et al [79]. The dependency of the interparticle friction on the magnitude of normal load is desirable to be considered in DEM simulations (similar to the study by [19]), provided that a complete characterization of the normal load-dependency of interparticle friction at the grain-scale is implemented based on experimental investigations; this can be a promising area of research in future studies.…”

Section: Monotonic Shearing Of Composite Interfaces: General Observations On Frictionmentioning

confidence: 98%

On the contact problem of soft-rigid interfaces: incorporation of Mindlin-Deresiewicz and self-deformation concepts

Tian

Senetakis

2021

Granular Matter

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The contact problem of soft-rigid interfaces is investigated in this study performing micromechanical-based experiments on sand (rigid) grains sliding against granulated (soft) rubber and by incorporating the Mindlin-Deresiewicz model. The analysis suggested that modifications of the theoretical model are necessary by taking into account, quantitatively, the deformable nature of the soft particles in terms of self-deformations during sliding. Interface friction, tangential stiffness and microslip displacement are analyzed and an attempt is made to provide inter-correlations among different contact parameters, incorporating experimental stiffness and realistic displacement thresholds into the theoretical model.

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Section: Monotonic Shearing Of Composite Interfaces: General Observations On Frictionmentioning

confidence: 98%

On the contact problem of soft-rigid interfaces: incorporation of Mindlin-Deresiewicz and self-deformation concepts

Tian

Senetakis

2021

Granular Matter

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“…In previous research, we have studied the contact behavior between sand particles and sand cleaning tools in the oil/gas industry from the perspective of tribology [ 4 , 20 , 21 ]. Due to the increasing demand and production of shale oil and gas, the characterization of proppant particles is essential to prove and demonstrate that the shale bed cracks are closely related to hydraulic fracturing [ 22 ]. This paper developed polymer-coated particles (PCP) with excellent mechanical properties considering the fracture process and fracture environment.…”

Section: Introductionmentioning

confidence: 99%

The Excellent Mechanical Performance of Polymer-Coated Ceramsite Particles for Efficient Fracturing: An Explanation from a Surface, Tribological Perspective

He,

Wang,

Wang

et al. 2024

Materials

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Hydraulic fracturing using micro-particles is an effective technology in the petroleum industry since the particles facilitate crack propagation of the shale layer, creating pathways for oil and gas. A new kind of polymer-coated ceramsite particles (PCP) was generated. The friction and wear properties of the particles under different loads and speeds were also studied. The tribological relationship between the newly fabricated polymer-coated ceramsite particles and the fracturing fluid was studied through tribological experiments under the condition of fracturing fluid lubrication. The results show that, in contrast, the wear of the new-generation particles is relatively stable, indicating that it has good adjustable friction properties. In addition, under the lubrication condition of fracturing fluid, the new-generation particles have better hydrophobicity, high-pressure resistance, and low reflux rate, which have an important value as a practical engineering application for improving shale gas production efficiency and production.

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“…In petroleum engineering, developments in unconventional reservoir technologies and hydraulic fracturing have led to an increased interest in the study of the interactions of proppants, including their damage behavior [ 8 , 9 ] and the frictional response between proppants and rocks [ 10 , 11 , 12 ]. These problems involve, among other aspects, grain global crushing and embedment of the proppants, which influence fluid flow and the quality of the production process.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Failure Behavior of Sand Grain Contacts with Hertz Modeling, Image Processing, and Statistical Analysis

Kasyap

Senetakis

2021

Sensors

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The crushing behavior of particles is encountered in a large number of natural and engineering systems, and it is important for it to be examined in problems related to hydraulic fracturing, where proppant–proppant and proppant–rock interactions are essential to be modeled as well as geotechnical engineering problems, where grains may crush because the transmitted stresses at their contacts exceed their tensile strength. Despite the interest in the study of the crushing behavior of natural particles, most previous experimental works have examined the single-grain or multiple-grain crushing configurations, and less attention has been given in the laboratory investigation of the interactions of two grains in contact up to their failure as well as on the assessment of the methodology adopted to analyze the data. In the present study, a quartz sand of 1.18–2.36 mm in size was examined, performing a total of 244 grain-to-grain crushing tests at two different speeds, 0.01 and 1 mm/min. In order to calculate stresses from the measured forces, Hertz modeling was implemented to calculate an approximate contact area between the particles based on their local radii (i.e., the radius of the grains in the vicinity of their contact). Based on the results, three different modes of failure were distinguished as conservative, fragmentary, and destructive, corresponding to micro-scale, meso-scale, and macro-scale breakage, respectively. From the data, four different classes of curves could be identified. Class-A and class-B corresponded to an initially Hertzian behavior followed by a brittle failure with a distinctive (single) peak point. The occurrence of hardening prior to the failure point distinguished class-B from class-A. Two additional classes (termed as class-C and class-D) were observed having two or multiple peaks, and much larger displacements were necessary to mobilize the failure point. Hertz fitting, Weibull statistics, and clustering were further implemented to estimate the influence of local radius and elastic modulus values. One of the important observations was that the method of analysis adopted to estimate the local radius of the grains, based on manual assessment (i.e., eyeball fitting) or robust Matlab-based image processing, was a key factor influencing the resultant strength distribution and m-modulus, which are grain crushing strength characteristics. The results from the study were further compared with previously reported data on single- and multiple-grain crushing tests.

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Effect of normal load and shearing velocity on the interface friction of organic shale – Proppant simulant

Cited by 18 publications

References 35 publications

On the contact problem of soft-rigid interfaces: incorporation of Mindlin-Deresiewicz and self-deformation concepts

On the contact problem of soft-rigid interfaces: incorporation of Mindlin-Deresiewicz and self-deformation concepts

The Excellent Mechanical Performance of Polymer-Coated Ceramsite Particles for Efficient Fracturing: An Explanation from a Surface, Tribological Perspective

A Study on the Failure Behavior of Sand Grain Contacts with Hertz Modeling, Image Processing, and Statistical Analysis

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