A NEW WELL TEST MODEL FOR STRESS-SENSITIVE AND RADIALLY HETEROGENEOUS DUAL-POROSITY RESERVOIRS WITH NON-UNIFORM THICKNESSES

• Published in: Journal of hydrodynamics. Series B Vol. 23; no. 6; pp. 759 - 766
• Main Authors: ZHANG, Lie-hui, GUO, Jing-jing, LIU, Qi-guo
• Format: Journal Article
• Language: English
• Published: Singapore Elsevier Ltd 01.12.2011; Springer Singapore; State Key Laboratory of Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500 China
• Subjects: composite dual-porosity; Computational fluid dynamics; Derivatives; Engineering; Engineering Fluid Dynamics; Fluid flow; Fluids; Hydrology/Water Resources; Laplace空间; Mathematical analysis; Mathematical models; non-uniform thickness; Numerical and Computational Physics; Perturbation methods; Reservoirs; Simulation; stress-sensitive; type curve; well test model; 不均匀; 双重孔隙; 地层厚度; 应力敏感; 径向; 试井模型; 非均匀模型; non-uniform thickness; well test model; stress-sensitive; composite dual-porosity; type curve
• ISSN: 1001-6058; 1878-0342
• DOI: 10.1016/S1001-6058(10)60174-6

This article presents a new well test model for stress-sensitive composite dual-porosity reservoirs based on the concept of permeability modulus, where the rock and fluid properties as well as the formation thickness vary in the radial direction. An analytical solution in the Laplace space for the pressure-transient behavior for a line-source, constant-rate well of this type of reservoir is obtained with the Laplace transformation and the perturbation technique. The pressure and its derivative in the reservoir and the effects of relevant parameters on the pressure-transient response are obtained. The model as well as the corresponding type curves may be used in predicting the production performance or analyzing the production data for this type of reservoir.