Research On The Block Classification Of Fuyu Reservoir In Southern Putaohua Field

Fuyu Reservoir in the Southern Putaohua Field is the low to extra-low permeability reservoir. The difference between the layer and the percolation characteristics in the developing reservoir leads to the higher difficulty in the oil developing and the bigger cost. Based on the qualitative and the quantitative methods, this article attempts to classify the oil layer so as to treat and adjust different blocks in the oil field developing. The results will guide the oil field developing.This article, according to the generalized analysis in the low permeability reservoir classification standard at home and abroad, has founded the blocks classification principle and the standard of Fuyu Reservoir in the Southern Putaohua Field. From the fundamental geological research, based on the reservoir microscopic characteristic laboratory experiment data analysis, the differences of blocks lithology characteristic, the pore type and the pore structural feature of Fuyu Reservoir in Southern Putaohua Field will be determined. Using the dynamic and static data of research area, through the mathematics statistical method of cluster analysis and discriminant analysis, different blocks discriminatory models of Fuyu Reservoir will be established. The important understandings as follows:(1)The standard of more favorable blocks in this area is: the higher quartz content, the lower feldspar and shale content, the pore type with more intergranular pore, the bigger face rate and the pore throat radius, the good separation and the capillary pressure curve with the good platform.(2)Six key parameters affect blocks superiority-inferiority that are the effective thickness, the porosity, the permeability, the oil production rate, the daily output and the oil saturation of Fuyu Reservoir in Southern Putaohua Field.(3)Based on qualitative and quantitative analysis, Fuyu Reservoir in the Southern Putaohua Field can be divided into three types: The good, the medium and the bad.