Selecting pertinent scale

the spatial distribution capacity of oil-gas fields in SichuanBasin can be calculated by fractal dimensions. Meanwhile

self-similarity of fault spatial distribution can be examined more effectively by using multifractal theory. Calculating results ofmultifractal dimensions of different zones in Sichuan Region show that spatial distribution ofoil-gas fields and faults are fractal structures and have quit.6 well self-similarity with correlation coefficients better than 0. 99.Oil-gas fields are closely related to the spatial distributionof faults in these zones.The fractal dimension of capacity

information dimension and correlation dimension of fault spatial distribution are about 1.02

1.03 and 1. 04. These zones aremain oil-gas enriched provinces.Therefore

oil--gas exploration and development should bestrengthened in southeastern and central Sichuan and Mianyang--Leshan Regions and in otherplaces

hydrocarbon exploration should be focused on deep-seated pools