Semi-analytical modeling for multi-wing fractured vertical wells in a bilaterally heterogeneous gas reservoir

Ren, Junjie; Wu, Qingxing; Liu, Xiaoxue; Zhang, Haibo

doi:10.1016/j.jngse.2021.104203

Cited by 2 publications

(1 citation statement)

References 49 publications

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“…To account for the reservoir heterogeneity caused by SRV, the line source solutions for a composite system comprising a high-permeability inner zone and a low-permeability outer zone are proposed [143,144], but such treatment can only account for heterogeneity in the radial direction. Ren et al [145] further proposed the line-source-based model for shale gas reservoirs with heterogeneity along the wellbore direction. Besides this, massive efforts have been made to couple the line-source-based models with multiple-porosity models [99,139,146], such that complex transport mechanisms can be considered in the multiscale porous system, e.g., gas diffusion, adsorption, and stress-sensitivity.…”

Section: Analytical and Semi-analytical Methodsmentioning

confidence: 99%

A Review of Macroscopic Modeling for Shale Gas Production: Gas Flow Mechanisms, Multiscale Transport, and Solution Techniques

Liu,

Zhang,

Zhang

et al. 2023

Processes

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The boost of shale gas production in the last decade has reformed worldwide energy structure. The macroscale modeling of shale gas production becomes particularly important as the economic development of such resources relies on the deployment of expensive hydraulic fracturing and the reasonable planning of well schedules. A flood of literature was therefore published focused on accurately and efficiently simulating the production performance of shale gas and better accounting for the various geological features or flow mechanisms that control shale gas transport. In this regard, this paper presents a holistic review of the macroscopic modeling of gas transport in shale. The review is carried out from three important points of view, which are the modeling of the gas flow mechanisms, the representation of multiscale transport, and solution techniques for the mathematical models. Firstly, the importance of gas storage and flow mechanisms in shale is discussed, and the various theoretical models used to characterize these effects in the continuum scale are introduced. Then, based on the intricate pore structure and various pore types of shale gas reservoirs, this review summarizes the multiple-porosity models in the literature to represent multiscale gas transport, and discusses the applicability of each model. Finally, the numerical and analytical/semi-analytical approaches used to solve the macroscopic mathematical model governing shale gas production are reviewed, with a focus on the treatment of the complex fracture network formed after multistage hydraulic fracturing.

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Section: Analytical and Semi-analytical Methodsmentioning

confidence: 99%

A Review of Macroscopic Modeling for Shale Gas Production: Gas Flow Mechanisms, Multiscale Transport, and Solution Techniques

Liu,

Zhang,

Zhang

et al. 2023

Processes

View full text Add to dashboard Cite

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Semi-analytical model of multiple fractured horizontal well across a discontinuity in a linear composite reservoir

Ren

Liu

et al. 2021

Journal of Geophysics and Engineering

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Many geologic settings can be treated as linear composite (LC) reservoirs, where linear discontinuities divide the formation into multiple zones with different properties. Although there have been many studies on pressure behavior of production wells in an LC reservoir, most of the studies focus on vertical wells. The modeling of multiple fractured horizontal (MFH) wells in an LC reservoir remains limited. The goal of the present work is to propose a general semi-analytical model of an MFH well situated anywhere in a two-zone LC reservoir. This model can take into account the situation where the horizontal well intersects with the discontinuity and hydraulic fractures are distributed in both the two zones. According to the point-source function method, the semi-analytical solution for an MFH well in LC reservoirs is derived by using superposition principle, fracture discrete scheme and numerical inversion algorithm of Laplace transformation. Type curves of MFH wells far away from a discontinuity and across a discontinuity in an LC reservoir are drawn and analysed, respectively. Furthermore, the effects of some parameters on pressure behavior and rate response of an MFH well across a discontinuity are studied. This research finds that the pressure behavior and rate response of an MFH well across a discontinuity are significantly affected by the well location, properties of hydraulic fractures and formation properties.

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Semi-analytical modeling for multi-wing fractured vertical wells in a bilaterally heterogeneous gas reservoir

Cited by 2 publications

References 49 publications

A Review of Macroscopic Modeling for Shale Gas Production: Gas Flow Mechanisms, Multiscale Transport, and Solution Techniques

A Review of Macroscopic Modeling for Shale Gas Production: Gas Flow Mechanisms, Multiscale Transport, and Solution Techniques

Semi-analytical model of multiple fractured horizontal well across a discontinuity in a linear composite reservoir

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