文档介绍:338A used to process the digital data. Multilayer images were pro- duced on which supervised and unsupervised classification sys- tems were applied to describe such features as matrix, pores, clay coatings, and quartz. Best results were obtained using bination of plain transmitted light and circularly polarised light. 936039 Porosity and pore structure from acoustic well logging data Tao, G; King, M S Geophys Prospect V41, N4, May 1993, P435-451 A new acoustic velocity to porosity transform is presented, based on a velocity model by Kuster and Toksoz, for improved understanding of pore structure by inverting P and S wave data obtained from sonic logs. Pore structure as well as total porosity can be taken into account. Calculations for sedi- mentary rocks using this procedure are presented - pared to those from the time-average equation. The potential for extending the method to plex lithologies and shaly rocks is discussed. 936O4O Fractai Menger Sponge and Sierpinski Carpet as models for reservoir rock/pore systems: II. Image analysis of natural fractal reservoir rocks Garrison, J R; Pearn, W C; yon Rosenberg, D U In Situ V17, N1, 1993, P1-53 Reservoir rock/pore systems are considered as natural fractal objects pared to two well known regular fractals. In order to investigate the fractal characteristics of natural reser- voir rocks and assess the validity of the Sierpinski Carp