Modeling Fracture Propagation Geometry in a Dual Porosity System

  • Fatima Omair Al Hameli

    Student thesis: Master's Thesis

    Abstract

    Over the years, production from unconventional reservoirs has gained significant attention and been the primary area of focus for many researchers. This is mainly attributed to the expanding discoveries of such deposits and technological advancements that make them viable for efficient extraction. However, a persisting challenge that is associated with such reservoirs is the limited understanding of the underlying flow mechanisms within tight reservoirs, as compared to conventional reservoirs. In order to produce from unconventional reservoirs, the reservoir must be artificially stimulated to create induced flow pathways to the producing wells. Hydraulic fracturing is one such well stimulation technique, that is used to enhance wellbore-formation contact area in order to allow for fluid flow at higher economic rates. Recent advancements in reservoir characterization have also led to modern geomodeling techniques which reveal tremendous complexities and high heterogeneity levels within such reservoirs. As such, the ability to model and assess the fracture propagation and analyze the stress direction at targeted source formations continues to be a challenge. This study aims to investigate the effect of fluid leak-off in a dual porosity system on the hydraulic fracture propagation geometry, which, in turn, affects the hydrocarbon recovery from unconventional tight reservoirs. A comprehensive investigation of fracture propagation within tight reservoirs is conducted using an in-house developed code. Both the Perkin-Kern-Nordgren-Carter II (PKN-C) and the Pseudo Three-Dimensional-Carter II (P3D-C) models were implemented for single- and dual porosity systems. Our novel contribution is in modeling the fracture propagation geometry using the P3D-C model in dual porosity systems, which, to the best of our knowledge, has never been done. The in-house code is developed in MATLABĀ®. The findings of this work provide insights into the complexities within hydraulic fracturing treatment design.
    Date of AwardJul 2021
    Original languageAmerican English

    Keywords

    • PKN-C
    • P3D-C
    • Hydraulic Fracturing
    • Dual Porosity

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