具有分形特性的油藏渗流理论进展概述

近年来,由国外科学家在上世纪80年代创立的分形几何在诸多学科中已得到广泛应用.而今非线性分形理论逐渐被应用于油藏数值模拟中.国外科学家和油藏工程师最先在渗流力学中引入分形维数和分形指数来描述多孔介质及其孔缝的分形特征,打破了采用均质或拟均质假设处理方法近似反应裂缝型多孔介质性质的传统方法,进而产生了应用分形特性描述油藏的分形特征和非均质性的分形油藏理论.应用分形理论建立的油藏数值模型与经典模型相比,虽然分形油藏渗流模型较为复杂,但更能贴近自然、真实的油藏,能够更有效地反映实际油藏的复杂性.

The Application of Flow Through Porous Media of Reservoir with Fractal Characteristic on Numeracal Simulation

The fractal theory created by foreign scientists in the eightise, last century,has been widly applied in many fields, the non-linear fractal theory is being introduced gradually into Reservoir Numerical Simulation. The firstcomers who descriped the pores and the fractures in porous media with fractal dimension and fractal parameter are the foreign scientists and the reservoir engineers, which breaks the traditionary way of using homogeneous or pesudo homogeneous assumption to reflect fractal porous media and makes the theory of fractal reservoir be founded. The farther research has been done to solute the models by the engineers. Comparing with the classic model, the reservoir numerical model which established with fractal theory is more complex and more closer to the natural and actual reservoir, it can demenstrate the complexity of real reservoir more effecttively.