Modeling Well Performance in Piceance Basin Niobrara Formation Using Embedded Discrete Fracture Model

Xu, Yifei; Yu, Wei; Li, Ningning; Lolon, Ely; Sepehrnoori, Kamy

doi:10.15530/urtec-2018-2901327

Cited by 29 publications

(12 citation statements)

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“…The validation of this methodology against the traditional LGR method can be found in our previous work [30,31]. The efficiency of the EDFM method is much higher than the LGR method, especially when dealing with multiple wells with a large number of fractures [33]. It has been widely applied to model well interference due to complex fracture hits [34,35], automatic history matching for shale reservoirs [36][37][38], gas injection for enhanced unconventional oil recovery [39][40][41], and naturally fractured reservoir simulation [42].…”

Section: Methodsmentioning

confidence: 93%

Investigation of the Effect of Natural Fractures on Multiple Shale-Gas Well Performance Using Non-Intrusive EDFM Technology

Liu

et al. 2019

Energies

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The influence of complex natural fractures on multiple shale-gas well performance with varying well spacing is poorly understood. It is difficult to apply the traditional local grid refinement with structured or unstructured gridding techniques to accurately and efficiently handle complex natural fractures. In this study, we introduced a powerful non-intrusive embedded discrete fracture model (EDFM) technology to overcome the limitations of exiting methods. Through this unique technology, complex fracture configurations can be easily and explicitly embedded into structured matrix blocks. We set up a field-scale two-phase reservoir model to history match field production data and predict long-term recovery from Marcellus. The effective fracture properties were determined thorough history matching. In addition, we extended the single-well model to include two horizontal wells with and without including natural fractures. The effects of different numbers of natural fractures on two-well performance with varying well spacing of 200 m, 300 m, and 400 m were examined. The simulation results illustrate that gas productivity almost linearly increases with the number of two-set natural fractures. Furthermore, the difference of well performance between different well spacing increases with an increase in natural fracture density. A larger well spacing is preferred for economically developing the shale-gas reservoirs with a larger natural fracture density. The findings of this study provide key insights into understanding the effect of natural fractures on well performance and well spacing optimization.

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Section: Methodsmentioning

confidence: 93%

Investigation of the Effect of Natural Fractures on Multiple Shale-Gas Well Performance Using Non-Intrusive EDFM Technology

Liu

et al. 2019

Energies

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“…EDFM provides efficient solutions to model complex fracture geometries in terms of reliability, flexibility, and simulation run time as exposed in different studies (Moinfar et al, 2012;Shakiba and Sepehrnoori, 2015;Zuloaga-Molero et al, 2016;Xu et al, 2017aXu et al, , 2017bXu et al, , 2018Yu et al, 2018a, Fiallos et al, 2019a, 2019b. By using the EDFM method, each fracture plane in the reservoir is discretized into smaller fracture segments using the matrix grid block boundaries so that these fracture segments are embedded into extra virtual grid blocks that are added to the original matrix grid (Xu et al, 2017a(Xu et al, , 2017bYu et al, 2018a).…”

Section: Embedded Discrete Fracture Modeling (Edfm)mentioning

confidence: 99%

Modeling Interwell Fracture Interference and Huff-N-Puff Pressure Containment in Eagle Ford Using EDFM

Fiallos-Torres

Ganjdanesh

et al. 2019

SPE Oklahoma City Oil and Gas Symposium

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First, I would like to express my profound gratitude to my academic supervisor Dr. Sepehrnoori for the continuous guidance and support during these two years of graduate school. I am truly grateful for his interest and willingness to guide me since the very first day of my graduate studies. I would also like to express sincere gratefulness to Dr. Wei Yu for his dedication, expertise advises, and insistent valuable guidance. I will always appreciate how he shared part of his extensive expertise in unconventional reservoirs, and reservoir modeling with me. Also, I would like to thank Erich Kerr and his company for supplying the field data that made this research possible. I gained great practice and understanding through their suggestions for my research work. Their invaluable support received weekly through my entire career will always be appreciated. There are not enough words to express how convinced I am that this would not have been possible without the support of my family. I thank my father Mario and my mother María for covering part of my tuition, and also my sister Carla Adriana for their continuous encouragement to pursue my dreams. I would like to thank Carolina for her caring love and support. I am indebted to my parents, my sister and my girlfriend who never stopped encouraging during both the good and the not so good times. I would also like to thank Reza, Sutthaporn, Fabio, Jorge, and Esmail for their collaboration and assertive comments for my work and my research. Finally, a very special acknowledgment is extended to the Fulbright Commission of Ecuador, the Department of State of the United States, and the Cockrell School of Engineering for being the sponsoring entities which provided me the scholarships to fund and make this accomplishment possible.

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“…Based on the above advantages, 23,29-40 many scholars have performed numerous simulations using the EDFM, demonstrating its good adaptability for simulating fractured reservoirs. 23,[29][30][31][32][33][34][35][36][37][38][39][40] The EDFM can describe the interporosity flow between different media, so each cell is connected with different numbers and types of cells. To understand and record these connections 30 proposed the non-neighboring connection (NNC) method, and Jiang et al 31 proposed the connection list, but they did not study their methods further.…”

Section: Introductionmentioning

confidence: 99%

“…The EDFM uses an orthogonal structured grid for the mesh matrix, and the fractures are divided into a series of segments based on the boundary of the matrix cell. Based on the above advantages, 23,[29][30][31][32][33][34][35][36][37][38][39][40] many scholars have performed numerous simulations using the EDFM, demonstrating its good adaptability for simulating fractured reservoirs. The EDFM is very flexible for handing various kinds of intersections, such as fracture-fracture and fracture-well intersections 28 .…”

mentioning

confidence: 99%

“…These segments are the fracture grids in the EDFM. 23,[29][30][31][32][33][34][35][36][37][38][39][40] The EDFM can describe the interporosity flow between different media, so each cell is connected with different numbers and types of cells. The interporosity between two systems is calculated using the Peaceman-like formulation, which appears as the source/sink term in the governing equations.…”

mentioning

confidence: 99%

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Simulation of a multistage fractured horizontal well in a tight oil reservoir using an embedded discrete fracture model

Zhao

Liu

Zhang

et al. 2019

Energy Science & Engineering

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As an unconventional resource, tight oil reservoirs hold abundant geological reserves and great development potential. However, tight oil reservoirs suffer from high heterogeneity and low permeability. To obtain commercial oil and gas flow, multistage hydraulically fractured horizontal well technology is often adopted. In this paper, an embedded discrete fracture model (EDFM) is adopted to study the fractured reservoir. First, the relationship between the EDFM connection list is studied and its coefficient matrix of the equation system is solved. EDFM connection list is a method to record the connections between the grids. Thereafter, the reasons for the sparsity of the coefficient matrix and the symmetry of the locations of nonzero elements in the matrix are explained, and a simple method to establish and assemble the coefficient matrix is proposed. Using this method, a simulator for tight oil reservoir with EDFM is developed. By comparing the simulation results of the self‐programming simulator with the commercial software SAPHIR, the usefulness of the simulator is verified. Finally, several simulations and sensitivity analysis are performed to determine the key factors affecting production. Modeling studies show the influence of fractures, the horizontal well, and stress sensitivity, providing very useful information for the design of hydraulic fracturing and production development programs.

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Modeling Well Performance in Piceance Basin Niobrara Formation Using Embedded Discrete Fracture Model

Cited by 29 publications

References 0 publications

Investigation of the Effect of Natural Fractures on Multiple Shale-Gas Well Performance Using Non-Intrusive EDFM Technology

Investigation of the Effect of Natural Fractures on Multiple Shale-Gas Well Performance Using Non-Intrusive EDFM Technology

Modeling Interwell Fracture Interference and Huff-N-Puff Pressure Containment in Eagle Ford Using EDFM

Simulation of a multistage fractured horizontal well in a tight oil reservoir using an embedded discrete fracture model

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