Decline-Curve Analysis of Hydraulically Fractured Wells in Dual-Porosity Reservoirs

Aguilera, Roberto; Ng, M.C.

doi:10.2118/22938-ms

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…The rock cementation exponent m (which ranges from 1 to 3) is a key parameter in well logging evaluations for determining the fluid saturation in carbonate reservoirs [4,13,15,29,56]. The relationship between m and the structural parameters of fracturedcavernous rocks was explored using the conductivity model and theoretical simulation equations, providing guidance for calculating fluid saturation in rocks with variable m values.…”

Section: Rock Cementation Exponentmentioning

confidence: 99%

“…For vuggy porosity, numerous conductivity models have been proposed, including the dual-porosity model based on a mechanism of series and parallel conduction [26][27][28][29][30][31][32][33][34][35][36][37][38], the tri-porosity model [29,30], and the fractal model [31,32]. A porosity model based on the effective medium theory has also been developed [33].…”

Section: Introductionmentioning

confidence: 99%

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Theoretical Simulation of the Resistivity and Fractured–Cavernous Structures of Carbonate Reservoirs

Zhang,

Gao,

Gao

et al. 2023

Processes

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Recently, theoretical modeling based on rock physics has emerged as a pivotal approach to studying the resistivity of complex fractured–cavernous microstructures. In this work, to study the effects of fractured–cavernous structures on carbonate reservoir resistivity, electrical conductivity models were developed based on the effective medium theory and Ohm’s Law, and theoretical simulations were performed to examine how the porosity and resistivity of the rock matrix, the formation water resistivity, and the parameters of the fractured–cavernous microstructure affect the resistivity of rocks saturated with petroleum or water. Furthermore, the modeling results revealed the specific relationships between these factors in petroleum-saturated and water-saturated rocks. For vuggy reservoirs, a significant negative correlation between throat diameter and resistivity was revealed when variations in the rock matrix and formation water resistivity were negligible. Furthermore, the pore shape—especially the extension of pores in the direction of the current—severely reduced the resistivity of petroleum-saturated rocks. For fractured reservoirs, the porosity and resistivity of the rock matrix were the primary factors affecting resistivity, with the fracture inclination angle and width also exhibiting pronounced effects on the resistivity of water-saturated rocks. The rock cementation exponent was much smaller when the matrix pores were interconnected through fractures than when they were interconnected through throats. The findings reveal that the effects of the structural parameters of fractured–cavernous carbonate reservoirs on reservoir resistivity differ between petroleum-saturated and water-saturated rocks. The conventional Archie’s equation is insufficient for evaluating fluid saturation in carbonate reservoirs. A saturation evaluation model with a variable rock cementation exponent tailored to the specific reservoir type should thus be developed.

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Section: Rock Cementation Exponentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical Simulation of the Resistivity and Fractured–Cavernous Structures of Carbonate Reservoirs

Zhang,

Gao,

Gao

et al. 2023

Processes

View full text Add to dashboard Cite

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Mathematical simulation of a pressure field exemplified by dual porosity reservoir

Bobreneva

Gubaydullin

2019

J. Phys.: Conf. Ser.

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The authors analyze the process of fluid transfer in a formation using the example of a porous fractured reservoir rock. A reservoir of this type has a natural-fracture system and is described by a dual porosity model. The most detailed description of a filtration process is provided by Warren-Root equations which analyze fluid redistribution between the matrix and the natural fracturing pattern. In this paper we develop a numerical model of fluid flow processes for a fractured-porous reservoir. The finite difference method is applied to solve partial differential equations. The problem is approximated by an implicit difference scheme. The system of linear algebraic equations at each time layer is solved by the matrix sweep method.

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Naturally Fractured Reservoirs and their Link to Tight and Shale Petroleum Reservoirs

Aguilera

2020

SPE Latin American and Caribbean Petroleum Engineering Conference

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Decline-Curve Analysis of Hydraulically Fractured Wells in Dual-Porosity Reservoirs

Abstract: IN1RODUCT:ION Type curves have been developed to facilitate reservoir Characterization. Their use is illustrated with an example.

Cited by 5 publications

References 10 publications

Theoretical Simulation of the Resistivity and Fractured–Cavernous Structures of Carbonate Reservoirs

Theoretical Simulation of the Resistivity and Fractured–Cavernous Structures of Carbonate Reservoirs

Mathematical simulation of a pressure field exemplified by dual porosity reservoir

Naturally Fractured Reservoirs and their Link to Tight and Shale Petroleum Reservoirs

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