Abstract:

Block Qian-146 in Jilin oil field has underwent an high water content and high production stage after years of exploration. Gaotaizi oil layer in this block can be divided into five types of reservoir flow units including A, B, C, D and E type ranked from good to poor. The features of the reservoir flow units of main target series of layers are described through multi-parameter vague clustering method. The 40 and 39 layers mainly develop type A and B reservoir flow units, and 41,42 and 38 layers mainly develop type C,D and E reservoir flow units. The types and distributions of reservoir flow units of all layers show a high goodness of fit with original energy production which demonstrates that the difference among reservoir flow units is an important factor that control the oil distribution. The instill, extract, permeation and flow systems of all reservoir flow units are studied through comprehensive analysis of geologic features of reservoir and dynamic data during oilfield development. Five laws of the distribution of remaining oil in XII of Gaotaizi oil layer, thus one delineation well, two old district infill well are arranged in the estimation range of remaining oil distribution. After putting into operation, original energy production is 11.2 t/d，5.5 t/d and 8.6 t/d separately.

Key words: reservoir flow unit, multi-factors fuzzy cluster, potential finding of developed reservoir, Gaotaizi reservoir bed, block Qian-146, oil fields