METHOD OF QUANTITATIVE CALCULATION AND ASSESSMENT OF BITUMAN CONTENT IN ANCIENT CARBONATE RESERVOIRS

摘要

The present invention provides a method of quantitative calculation and assessment of bitumen content in ancient carbonate reservoirs, comprising: sampling a reservoir at target intervals, grinding the collected carbonate core samples into thin sections, selecting at least one of view positions for each piece of the carbonate thin section at random, collecting an image of the view position; analyzing the collected image of the view position, defining distribution morphology of the bitumen in the collected image of the view position; highlighting display of the bitumen; acquiring a percentage of the bitumen in the image of a single view position; based on the obtained percentage of the bitumen in the image of the single view position in conjunction with the number of pictures randomly collected at a specific depth, obtaining a percentage of the bitumen at the specific depth; counting the percentage of the bitumen from a longitudinal direction and from a plane, respectively, and constructing a bitumen distribution histogram and a planar distribution graph thereof. The method of quantitative calculation and assessment of bitumen content in ancient carbonate reservoirs of the present invention can obtain the bitumen content in ancient carbonate reservoirs.