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Optimization of Multistage Hydraulic Fracturing Treatment for Maximization of the Tight Gas Productivity

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Optimization of Multistage Hydraulic Fracturing Treatment for Maximization of the Tight Gas Productivity (Volume 58) (English shop)

Mengting Li (Author)

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ISBN-13 (Hard Copy) 9783736999343
ISBN-13 (eBook) 9783736989344
Language English
Page Number 208
Edition 1.
Book Series Schriftenreihe des Energie-Forschungszentrums Niedersachsen (EFZN)
Volume 58
Publication Place Göttingen
Place of Dissertation Clausthal
Publication Date 2018-12-17
General Categorization Dissertation
Departments Energy engineering
Keywords Productivity Optimization, Multistage Hydraulic Fracturing, Dimensionless Fracture Conductivity, Tight Gas Reservoir, THM Coupling, 3D Numerical Simulation
URL to External Homepage https://www.efzn.de/de/ueber-uns/oeffentlichkeitsarbeit/efzn-schriftenreihe/
Description

Hydraulic fracturing is essential technology for the development of unconventional resources such as tight gas. So far, there are no numerical tools which can optimize the whole process from geological modeling, hydraulic fracturing until production simulation with the same 3D model with consideration of the thermo-hydro-mechanical coupling. In this dissertation, a workflow and a numerical tool chain were developed for design and optimization of multistage hydraulic fracturing in horizontal well regarding a maximum productivity of the tight gas wellbore. After the verification a full 3D reservoir model is generated based on a real tight gas field in the North German Basin. Through analysis of simulation results, a new calculation formula of FCD was proposed, which takes the proppant position and concentration into account and can predict the gas production rate more accurately. However, not only FCD but also proppant distribution and hydraulic connection of stimulated fractures to the well, geological structure and the interaction between fractures are determinant for the gas production volume. Through analysis the numerical results of sensitivity analysis and optimization variations, there is no unique criterion to determine the optimal number and spacing of the fractures, it should be analyzed firstly in detail to the actual situation and decided then from case to case.