Anisortopic Modeling of Hydraulic Fractures Height Growth in the Anadarko Basin

Merzoug, Ahmed; Ellafi, Abdulaziz; Rasouli, Vamegh; Jabbari, Hadi

doi:10.3390/applmech4010004

Cited by 4 publications

(1 citation statement)

References 58 publications

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“…Decreased resource utilization: Fishbone drilling could potentially reduce the dependency on hydraulic fracturing, which involves injecting vast amounts of water and chemicals into the ground as stated by Merzoug et al [65]. By decreasing the reliance on hydraulic fracturing, fishbone drilling can lower the energy and resource consumption associated with drilling operations, thereby reducing CO 2 emissions.…”

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A Comprehensive Review of Fishbone Well Applications in Conventional and Renewable Energy Systems in the Path towards Net Zero

Ndulue,

Tomomewo,

Khalifa

2023

Fuels

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Fishbone drilling (FbD) involves drilling multiple micro-holes branching out in various directions from the primary vertical or deviated wellbore. FbD is similar to multilateral micro-hole drilling and can be employed to boost hydrocarbon production in naturally fractured formations or during refracturing operations by connecting existing natural fractures. Key design elements in fishbones include determining the number, length, and spacing between the branches, and the angle at which the branches deviate from the main borehole. Fishbone wells have emerged as a promising technology for improving well performance and reducing environmental impact. In this paper, we present a comprehensive review of the different applications of fishbone wells in conventional and renewable energy systems. We discuss the potential of fishbone wells for enhanced oil and gas recovery, as well as their application in unconventional resources such as coal bed methane. Moreover, we examine the feasibility of fishbone wells in renewable energy systems, such as geothermal energy and carbon capture, utilization, and storage (CCUS). We highlight the various benefits of fishbone wells, including reduced carbon footprint, enhanced efficiency, and increased sustainability. Finally, we discuss the challenges and limitations associated with fishbone wells in different energy systems. This review provides a comprehensive overview of the potential and challenges of fishbone wells in reducing carbon footprint and improving well performance in a wide range of energy systems.

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confidence: 99%

A Comprehensive Review of Fishbone Well Applications in Conventional and Renewable Energy Systems in the Path towards Net Zero

Ndulue,

Tomomewo,

Khalifa

2023

Fuels

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Analytical and Numerical Investigations of the Impact of Anisotropic Elastic Properties on Hydraulic Fracture Geometry

Shawaf,

Dehdouh,

Rasouli

2024

Day 3 Wed, February 14, 2024

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This study investigates the impact of transverse isotropic vertical (TIV) characteristics on fracture geometry, spacing, and stress shadow development in shales. Shales exhibit transverse isotropic characteristics due to their rich organic content and laminated depositional environments. The lamination planes are horizontal in shale formations having a symmetric axis vertical to the bedding plane. Neglecting the TIV nature of shale formations leads to erroneous in-situ stress estimates, resulting in inefficient fracture design and reduced recovery. The study employs analytical modeling and numerical simulations to analyze the effects of TIV medium properties. Analytical modeling shows that Young's modulus anisotropy significantly impacts fracture width, while Poisson's ratio has minimal influence. Stress anisotropy is also examined, revealing that high-stress anisotropy allows for closely spaced fractures, theoretically eliminating minimum spacing concerns. Numerical simulations confirm that higher anisotropic stiffness reduces fracture width in TIV formations, aligning well with analytical modeling results. Wide fracture spacing produces a uniform and symmetric geometry, while narrow spacing results in non-uniform and asymmetric growth, with some fractures failing to initiate. Fracture turning due to stress anisotropy was also investigated, and the fracture propagation results clearly demonstrated the starting of fracture turning between 1000 to 1500 psi stress anisotropy. Micro-seismic was used to validate and calibrate fracture geometry. Economic-based optimization determines the optimal fracture spacing.

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Numerical Simulation Research on the Effect of Artificial Barrier Properties on Fracture Height

Zou

Zhang

et al. 2023

Processes

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Hydraulic fracturing is an important measurement for the stimulation of oil and gas wells and is widely used in the development of low-permeability and ultra-low-permeability reservoirs. However, fractures can pass through barriers with poor properties during fracturing, resulting in fractures that do not reach the pre-designed length. In a worse situation, it is possible to communicate with the water layer and cause sudden water flooding, resulting in the failure of the fracturing construction. In order to improve the efficiency of fracturing construction, an effective way to control the height of fractures is by laying diverting agents to form artificial barriers. In this study, we established a three-dimensional numerical calculation model of fracture propagation, considering artificial barriers in the finite element analysis framework; the fracture propagation is governed by a cohesive zone model. The influence of artificial barriers with different Young’s modulus and different permeability on the fracture height was simulated and calculated. Different fracture geometries under different pumping injection rates were also considered. The simulation results show that the smaller the Young’s modulus of the artificial barrier, the smaller the extension in the direction of the fracture height: when its Young’s modulus is 28 GPa, the half fracture height is about 25 m, while when Young’s modulus increases to 36 GPa, the half fracture height increases by about 10m. When the fracture does not penetrate the artificial barrier area, the larger the Young’s modulus, the smaller the fracture width and the larger the fracture height. With the change in the permeability of the artificial barrier, the change in the fracture width direction of the fracturing fracture is only about 0.5 m, but the inhibition on the fracture height direction is more obvious; in the case of maximum permeability and minimum permeability, the fracture height change is 10 m. The influence of pumping injection rates on the width and height of the fracture is obvious: with the increase in the pumping rates, both the height and width of the fractures increase. However, when the pumping rate increases from 0.12 m3/s to 0.14 m3/s, the change in the direction of fracture height is no longer significant, and the increase is only 0.6 m. This study investigates the role of artificial barrier properties and pumping rates in controlling fracture height extension, clarifies the feasibility of artificial barriers to control fracture height technology, and provides guidance for the selection of diverting agents and the determination of the pumping rate in the process of fracturing construction.

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Anisortopic Modeling of Hydraulic Fractures Height Growth in the Anadarko Basin

Cited by 4 publications

References 58 publications

A Comprehensive Review of Fishbone Well Applications in Conventional and Renewable Energy Systems in the Path towards Net Zero

A Comprehensive Review of Fishbone Well Applications in Conventional and Renewable Energy Systems in the Path towards Net Zero

Analytical and Numerical Investigations of the Impact of Anisotropic Elastic Properties on Hydraulic Fracture Geometry

Numerical Simulation Research on the Effect of Artificial Barrier Properties on Fracture Height

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