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Variable-Permeability Well-Testing Models and Pressure Response in Low-Permeability Reservoirs with non-Darcy Flow

Feng, Naichao and Cheng, Shiqing and Lan, Weixing and Mu, Guoquan and Peng, Yao and Yu, Haiyang (2016) Variable-Permeability Well-Testing Models and Pressure Response in Low-Permeability Reservoirs with non-Darcy Flow. Earth Sciences Research Journal, 20 (1). J1-J6. ISSN 2339-3459

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This paper proposes the concept of variable-permeability effect and sets up the one-dimensional and two-dimensional non-Darcy well testing models. The finite difference algorithm is employed to solve the differential equations of the variable-permeability model, and the non-convergence of the numerical solutions is solved by using the geometric mean of permeability. The type curves of pressure and pressure derivative with variable-permeability effect are obtained, and sensitivity analysis is conducted. The results show that the type curves upturn in the middle and late sections, and the curves turn more upward with the severer of the variable-permeability effect. The severer the non-Darcy effect is, the less obviously the curve upturns caused by boundary effect. Furthermore, the boundary effect is increased by increasing the number of impermeable boundaries or decreasing the distance between the well and boundary.

Tipo de documento:Artículo - Article
Palabras clave:Variable-permeability effect, Low-permeability reservoirs, Non-Darcy ow, Well testing, Pressure gradient, Boundary effect.
Temática:5 Ciencias naturales y matemáticas / Science > 55 Ciencias de la tierra / Earth sciences & geology
Unidad administrativa:Revistas electrónicas UN > Earth Sciences Research Journal
Código ID:64082
Enviado por : Dirección Nacional de Bibliotecas STECNICO
Enviado el día :06 Junio 2018 13:36
Ultima modificación:06 Junio 2018 13:36
Ultima modificación:06 Junio 2018 13:36
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