Experimental and Numerical Study on Proppant Transport in a Complex Fracture System

Zhang, Zhaopeng; Zhang, Shicheng; Ma, Xinfang; Guo, Tiankui; Zhang, Wenzhe; Zou, Yushi

doi:10.3390/en13236290

Cited by 18 publications

(2 citation statements)

References 41 publications

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“…Large-scale volume fracturing with a complex fracture network mainly composed of low-viscosity slick water is an effective measure for unconventional oil and gas reservoirs to achieve production [1]. In order to achieve a high production capacity for fracturing wells, it is necessary to carry the proppant to the far end of the fracture and support the artificial fracture for a long time without displacement of the proppant [2]. How to improve the proppant delivery efficiency, how to maintain the stable placement of the proppant, and how to obtain better stacking height and porosity in the fracture have been challenging for researchers [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

High-Efficiency Proppant Placement Technology and Its Application

Guo,

Zhou,

Song

et al. 2024

Contemporary Developments in Hydraulic Fracturing

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Aiming at solving the problem of sand production and limited sand carrying distance during slick water fracturing of unconventional oil and gas reservoirs, an efficient proppant placement technology based on fiber structure stabilizer is innovatively developed: During the sand fracturing construction of oil and gas wells, the fiber and fiber structure stabilizer is pumped into the reservoir with proppant in sand-adding stage, and the components including fiber, stabilizer, proppant and drag reducing agent form a stable net-like structure to improve the proppant placement distance and stacking height, thus increasing the effective support volume. With this technology, the seepage mode of artificial fracture is changed and its conductivity of supporting fracture body is greatly improved; the critical flow rate of proppant flowback is increased up to tens of folds compared in the same operation condition. It has been applied in more than 30 wells of tight gas and shale oil and gas in China. The sand production rate after fracturing in tight gas was 79% lower than conventional fracturing without additives of fiber and fiber structure stabilizer. The effect of proppant flowback control and hydrocarbon stimulation is remarkable.

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Section: Introductionmentioning

confidence: 99%

High-Efficiency Proppant Placement Technology and Its Application

Guo,

Zhou,

Song

et al. 2024

Contemporary Developments in Hydraulic Fracturing

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“…Many scholars have done a lot of research on the migration law of proppant in the wellbore and the dynamic cou-pling between proppant and fracture propagation, whose research methods are mainly carried out from two aspects: experimental simulation and numerical simulation [4][5][6][7][8]. Wen et al systematically studied the settlement and migration law of proppant in wellbore and fracture during shale gas slick water fracturing by using self-designed experimental instruments and established a critical velocity calculation model based on experimental data through multivariate nonlinear fitting.…”

Section: Introductionmentioning

confidence: 99%

Migration Law and Influence of Proppant in Segmented Multicluster Fracturing Wellbore of Deep Shale Horizontal Well

et al. 2022

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Intensive stage multicluster fracturing is the main technology of deep shale gas development, but this technology is easy to lead to the uneven propagation of multiple fractures. In order to deeply analyze the influence mechanism and law of proppant flow in the wellbore on multiple fractures and propagation, Firstly, based on the theoretical knowledge of computational fluid dynamics (CFD), a numerical model of solid-liquid two-phase flow of proppant migration in horizontal wellbore is established, which is calculated and solved by using the Euler-Euler multiphase-flow mixture model, and the effects of different influencing factors on the migration and distribution of proppant in wellbore are studied. Then, based on the fluid structure coupling theory, a planar three-dimensional (PL3D) numerical model of multicluster fracturing in horizontal wells is established. Taking the numerical simulation results of wellbore proppant migration as the initial condition, the influence law of proppant settlement on the fluid volume distribution among multiple clusters and the difference of multifracture geometry is clarified. The results show that the proppant content in the horizontal wellbore increases from heel end to toe end. The fracturing fluid viscosity and sand ratio are the main influencing parameters. The proppant settlement in the wellbore is also an important factor affecting the liquid and sand injection of multifracture. When considering the proppant settlement in the wellbore, the phenomenon of multifracture uneven propagation is more significant. The construction scheme of medium viscosity, large displacement fracturing fluid, large proppant size, and medium sand ratio in a certain range is conducive to promote the even propagation of multifracture. This study is helpful to guide the construction design of multicluster fracturing in horizontal wells, so as to improve the success rate of multicluster fracturing and greatly save the construction cost.

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Review on the impact of fluid inertia effect on hydraulic fracturing and controlling factors in porous and fractured media

Edirisinghe,

Perera

2024

Acta Geotech.

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The impact of fluid inertia on fracture flow dynamics, particularly under high-velocity conditions, has emerged as a critical consideration in petroleum engineering and related fields. This review paper investigates the profound effects of inertia-dominated nonlinear flow, a phenomenon increasingly recognised for its significant influence on fluid dynamics in rock fractures. Given the prevalence and importance of such flows in field applications, neglecting fluid inertial effects is no longer justifiable. A comprehensive investigation into these effects is essential for advancing our understanding of fracture flow mechanisms and optimising engineering practices. This review aims to thoroughly analyse the impact of fluid inertia on applications in hydraulic fracturing. It offers an in-depth discussion of how fluid inertia affects critical aspects of crack propagation, fracture diagnostics, proppant transport and settlement, and fines migration. Additionally, this paper identifies and explores four main factors that influence the fluid inertia effect in fracture flows: fracture roughness, intersections and dead ends within the fracture network, variations in contact area and fracture aperture, and the role of shear displacement. The review provides valuable insights into the complex interplay between fluid inertia and fracture flow dynamics by elucidating these factors.

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Experimental and Numerical Study on Proppant Transport in a Complex Fracture System

Cited by 18 publications

References 41 publications

High-Efficiency Proppant Placement Technology and Its Application

High-Efficiency Proppant Placement Technology and Its Application

Migration Law and Influence of Proppant in Segmented Multicluster Fracturing Wellbore of Deep Shale Horizontal Well

Review on the impact of fluid inertia effect on hydraulic fracturing and controlling factors in porous and fractured media

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