Abstract:

Yanchang Formation reservoir of the Ordos Basin is litho-oil reservoir. The inhomogeneity of reservoir is very strong.  The Ordos basin reservoir inhomogeneity researching is based on linear interpolation. The inhomogeneity of reservoir is a type of nonlinear change process. The normal interpolation can not interpret true situation of the reservoir. Based on the reservoir characteristics of the statistics self-similar, fractional Brownian motion, fractional  Gaussian noise, using fractal interpolation, the reservoir homogeneity of Chang 2 Members of the Yanchang Formation in Qiaozhen of the Ordos Basin is studied. Based on the computational result, it can be known that the computational result is similar to the measured value in the same sand body. In the different sand body the two values have great difference. The research of reservoir inhomogeneity must base on the sedimentary facies. Knowing the sand spreading and sand body morphology, using fractal interpolation method, the result can approximate true situation of the reservoir.

Key words: reservoir, inhomogeneity, fractal, permeability