关键词: 非牛顿流, 复合油藏, 试井, 压力恢复曲线, 解释模型

Abstract: The fluid flow of non-Newtonian power law fluids under the polymer flooding has been studied. Under the assumption of compound regions existing in a reservoir,a fluid model and the partial differential equations for pressure distribution have been proposed. The initial and three outer boundary conditions such as infinite. finite with constant pressure and closed boundary have been given according to polymer flooding in an oil field. The models of Newtonian flow in a compound reservoir,non-Newtonian power-law flow in a homogeneous reservoir and Newtonian and non-Newtonian compound reservoir are special cases. Well test models, their solutions in Laplace space and two special cases of two and three regions have been given. The relations between dimensionless pressure and time has been studied by using Stehfest numerical inversion. The method has been applied with two examples in this paper. This study can be used to predict formation permeability,skin factor and reservoir pressure with non-Newtonian such as polymer fluid flow and locate the polymer flooding frontier.

Key words: non-Newtonian flow, compound reservoir, well test, pressure build-upc urve, interpretation model