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Título del libro: Society Of Petroleum Engineers - Spe Canadian Energy Technology Conference And Exhibition, Cet 2025
Título del capítulo: Numerical Simulation of Huff-And-Puff Gas Injection in Shale Reservoirs Using an Integrated Model of Geomechanics and Multiporosity Fluid Flow

Autores UNAM:
BRUNO ARMANDO LOPEZ JIMENEZ;

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Autores externos:

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Idioma:

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Año de publicación:
2025

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Palabras clave:

Crack tips; Diffusion in gases; Gas permeability; Gasoline; Injection (oil wells); Natural gas deposits; Negative temperature coefficient; Oil shale; Petroleum reservoir evaluation; Petroleum transportation; Positive temperature coefficient; Secondary recovery; Seepage; Shear bands; Stress analysis; Complex task; Fluid-flow; Integrated modeling; Isotropics; Oil recoveries; Rock deformation; Shale plays; Stress-dependent; Transport mechanism; Transverse isotropic; Oil well flooding

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Resumen:

Improving oil recovery is one of the main challenges of shale play exploitation, and huff-and-puff gas injection has established itself as one of the most important techniques for the industry and academia. Therefore, understanding the physics of huff-and-puff gas injection in shale reservoirs is significantly of interest. However, the multiporosity, multitransport mechanism and stress-dependent nature of shale reservoirs make this a very complex task. This paper aims at investigating huff-and-puff gas injection, considering multiple storage and transport mechanisms present in shale reservoirs as well as the effect of rock deformation on them. This is attained by using a new in-house 3D integrated numerical simulator of fluid flow and geomechanics. The simulator incorporates a quintuple porosity formulation (and gas dissolved in the solid kerogen), several transport mechanisms (Darcy flow, slip flow and Knudsen diffusion), and the effect of rock deformation on these storage systems and transport phenomena through an iterative coupling with the rock mechanics model. The model accounts for hysteresis in rock properties during the huff-and-puff cycles. Constitutive laws for isotropic and vertical transverse isotropic (VTI) materials are implemented and simulations of primary recovery and huff-and-puff scenarios are carried out for both rock behaviors. Simulation results illustrate the effect of the huff-and-puff cycles on the stresses in hydraulic fractures, natural fractures and the shale matrix. The behavior of adsorbed porosity, organic porosity and sorption-dependent permeability is shown and analyzed. The changes in hydraulic fracture permeability due to variation in stresses are presented along with the effect of hysteresis, revealing multiple rebound curves generated during the huff-and-puff cycles. Comparison of results between the isotropic and VTI models displays moderately different results for the cases analyzed in this work. Simulation results also corroborate the importance of good hydraulic fracture properties and adequate gas injection rates in the performance of huff-and-puff injection projects in shale reservoirs. Simulation of huff-and-puff gas injection in shale reservoirs using a 3D integrated model that incorporates a quintuple porosity formulation, multiple transport mechanisms and rock mechanics (including hysteresis effects) has not been published in the literature. This is a step forward in the modeling and understanding of huff-and-puff injection processes in shale reservoirs. Copyright 2025, Society of Petroleum Engineers

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Entidades citadas de la UNAM:

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Fuente:


ISBN:
9781959025672
Editorial:
Society of Petroleum Engineers

Tipo de producto:
Conference Paper

DOI:
10.2118/223995-MS