A novel approach to assessing the anisotropic permeability parameters of fractured media

Song, Xinyu; Liu, Y T; Jiang, Xiangming; Ding, Zhuoying; Xue, Liang

doi:10.1088/1757-899x/474/1/012043

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…Finally, the empirical estimation methods mainly include the fracture network measurement method, fracture network numerical test method, and geological index estimation method. Among these, in the fracture network measurement method [16][17][18], the geometric parameters of fractures in the measurement and statistic area are substituted into the permeability tensor formula to obtain the initial value of the equivalent permeability tensor, which must then be corrected using the hydraulic test method or inverse analysis method. The fracture network numerical test method [19][20][21] was proposed by Long et al [19] to determine the REV and equivalent permeability tensor of rock mass.…”

Section: Introductionmentioning

confidence: 99%

An Estimation Model for Hydraulic Conductivity of Low-Permeability and Unfilled Fractured Granite in Underground Water-Sealed Storage Caverns

et al. 2021

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The permeability of rock mass is closely related to the stability and safety of underground structure, especially in underground water-sealed storage caverns. With regard to the estimation approaches in predicting the hydraulic conductivity of fractured granite in water-sealed storage caverns, there are some limitations of parameter selection leading to poor applicability. Focusing on the contribution of the water conduction fractures (WCF) to the hydraulic conductivity, we attempted to propose a novel model, the CA model, for estimating its hydraulic conductivity based on the fracture orientation index and the normal stress index by analyzing the borehole wall imaging results and borehole water-pressure test results in the site of underground water-sealed storage caverns. The results indicated that the proposed model is suitable for low-permeability and unfilled fractured granite, exhibiting good effectiveness by clarifying the relation between geomechanical parameters and hydraulic behavior. Further, the parameters upon which the proposed model is based are representative and easy to obtain, which has certain guiding significance and reference value for analyzing the permeability characteristics of similar rock masses.

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Section: Introductionmentioning

confidence: 99%

An Estimation Model for Hydraulic Conductivity of Low-Permeability and Unfilled Fractured Granite in Underground Water-Sealed Storage Caverns

et al. 2021

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Ensemble-based optimization of hydraulically fractured horizontal well placement in shale gas reservoir through Hough transform parameterization

Xue

Jiang

et al. 2021

Pet. Sci.

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Shale gas reservoirs have been successfully developed due to the advancement of the horizontal well drilling and multistage hydraulic fracturing techniques. However, the optimization design of the horizontal well drilling, hydraulic fracturing, and operational schedule is a challenging problem. An ensemble-based optimization method (EnOpt) is proposed here to optimize the design of the hydraulically fractured horizontal well in the shale gas reservoir. The objective is to maximize the net present value (NPV) which requires a simulation model to predict the cumulative shale gas production. To accurately describe the geometry of the hydraulic fractures, the embedded discrete fracture modeling method (EDFM) is used to construct the shale gas simulation model. The effects of gas absorption, Knudsen diffusion, natural and hydraulic fractures, and gas–water two phase flow are considered in the shale gas production system. To improve the parameter continuity and Gaussianity required by the EnOpt method, the Hough transformation parameterization is used to characterize the horizontal well. The results show that the proposed method can effectively optimize the design parameters of the hydraulically fractured horizontal well, and the NPV can be improved greatly after optimization so that the design parameters can approach to their optimal values.

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An implementation of mimetic finite difference method for fractured reservoirs using a fully implicit approach and discrete fracture models

Zhang

Abushaikha

2021

Journal of Computational Physics

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A novel approach to assessing the anisotropic permeability parameters of fractured media

Cited by 4 publications

References 6 publications

An Estimation Model for Hydraulic Conductivity of Low-Permeability and Unfilled Fractured Granite in Underground Water-Sealed Storage Caverns

An Estimation Model for Hydraulic Conductivity of Low-Permeability and Unfilled Fractured Granite in Underground Water-Sealed Storage Caverns

Ensemble-based optimization of hydraulically fractured horizontal well placement in shale gas reservoir through Hough transform parameterization

An implementation of mimetic finite difference method for fractured reservoirs using a fully implicit approach and discrete fracture models

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