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You searched for +publisher:"The Ohio State University" +contributor:("Tomasko, David"). One record found.

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The Ohio State University

1. Gong, Yiwen. Toward Better Understandings of Unconventional Reservoirs - Rock Mechanical Properties and Hydraulic Fracture Perspectives.

Degree: PhD, Chemical Engineering, 2020, The Ohio State University

The advancements of hydraulic fracturing techniques ensure the improved fracture surface areas that are open to fluids flow. The induced microcracks accelerate the fluid communications between fractures and the fracture adjacent rock matrix at fracture surface. In brittle rocks, the generated fracture network puzzles engineers since the induced hydraulic fractures and activated pre-existing fractures challenge the stimulated reservoir volume (SRV) characterizations. Furthermore, the necessary engineered justifications of each stage due to lateral heterogeneity of the reservoir and the stress shadow effect (in-situ stress increase along the wellbore) even introduce another level of complexity of the effective fracture drainage complexity. Simultaneous fracture growth becomes difficult, resulting in variations of fracture half lengths, within a stage, and among stages. The failure planes of the rock, from mode I, mode II and the combination of them, are not smooth and parallel; instead, they are usually associated with certain surface roughness and non-planar morphology, which in turn inhibit the ideal Poiseuille flow in the fracture. As a result, the fundamental studies of non-planar and rough complex fracture paths to the proppant transport are essentially inevitable.To gain better understanding of the fracture network and the geomechanical aspects that form the complex fracture network, the objective of this work is firstly to quantitatively measure the rock damage from the induced microcracks at the adjacent matrix of the hydraulic fracture; we will then investigate the rock geomechanical properties which essentially dominant the fracture generation using machine learning approaches with cross-disciplinary data sources, including well logs, petrophysical properties, and rock microstructures information. Lastly, we will probe proppant transport characteristics in bifurcated fracture system. To achieve the aforementioned adjectives, this dissertation is structured into two major parts: the microstructure diagnosis of fractured tight rocks and geomechanical rock property estimations beyond the traditional approach as the first part and the proppant transport considering the induced microfracture/bifurcated fractures as the second part. To be more specific, the microstructure analysis is achieved by SEM image analysis while the geomechanical study is conducted optimizing the data usage from machine learning techniques. The second major part is to build the complex fracture network modeling by including non-planarity, and secondary fractures and tertiary fractures in the computational fluid dynamics modeling frame (Eulerian-Eulerian) in the field scale as well as computational fluid dynamics – discrete element method coupling frame (Eulerian- Lagrangian) in the flow-unit scale, respectively. The proppant transport loss passing the bifurcated fractures are evaluated. Advisors/Committee Members: El-Monier, Ilham (Advisor), Tomasko, David (Committee Co-Chair).

Subjects/Keywords: Chemical Engineering; Petroleum Engineering; Proppant transport; machine learning; rock geomechanical properties; CFD; CFD-DEM

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APA (6th Edition):

Gong, Y. (2020). Toward Better Understandings of Unconventional Reservoirs - Rock Mechanical Properties and Hydraulic Fracture Perspectives. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1605633687308252

Chicago Manual of Style (16th Edition):

Gong, Yiwen. “Toward Better Understandings of Unconventional Reservoirs - Rock Mechanical Properties and Hydraulic Fracture Perspectives.” 2020. Doctoral Dissertation, The Ohio State University. Accessed April 12, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1605633687308252.

MLA Handbook (7th Edition):

Gong, Yiwen. “Toward Better Understandings of Unconventional Reservoirs - Rock Mechanical Properties and Hydraulic Fracture Perspectives.” 2020. Web. 12 Apr 2021.

Vancouver:

Gong Y. Toward Better Understandings of Unconventional Reservoirs - Rock Mechanical Properties and Hydraulic Fracture Perspectives. [Internet] [Doctoral dissertation]. The Ohio State University; 2020. [cited 2021 Apr 12]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1605633687308252.

Council of Science Editors:

Gong Y. Toward Better Understandings of Unconventional Reservoirs - Rock Mechanical Properties and Hydraulic Fracture Perspectives. [Doctoral Dissertation]. The Ohio State University; 2020. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1605633687308252

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