A Method for Calculating Formation Oil Saturation Using Compensated Acoustic Waves

Abstract

The invention relates to a mine geophysical logging interpretation technology, in particular to a method for calculating formation oil saturation by using compensated sound waves. A method for calculating formation oil saturation using compensated acoustic waves, by establishing formation porosity and oil saturation S O The relationship between the oil saturation S O The problem. The invention provides a method for calculating the oil saturation of the formation, which overcomes the problem that the oil saturation of the formation cannot be calculated without the resistivity curve in well logging. The problem of saturation calculation of low-resistivity oil layers whose resistivity cannot reflect the oiliness of the formation and the saturation calculation of ultra-low permeability oil layers where the Archie model is not applicable is solved.

Description

A method for calculating formation oil saturation by using compensated acoustic waves technical field The present invention relates to mine geophysical logging interpretation technology, specifically relate to a kind of utilizing compensation acoustic wave to calculate formation method for oil saturation. Background technique In oil and gas development, the interpretation of oil saturation is an important factor in judging the oil content of the formation, calculating reserves, and predicting production. To work, since 1942, Archie used experimental methods to establish the interpretation model of saturation, the interpretation of oil saturation has been Based on the Archie model and its improved model, the oil saturation is directly calculated with the logging curve, which effectively solves the problem of oil saturation. and degree evaluation problems. Along with the development of oil field, the improvement of technical level, extra-low permeability oil reservoi...

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Problems solved by technology

[0003] With the development of oilfields and the improvement of technology, extra-low permeability reservoirs and low-resistivity reservoirs have been discovered and put into development, but it is difficult to explain the reservoir oil saturation of these special reservoirs with the Archie model

For ultra-low permeability reservoirs, in the log-log coordinates If it is not on a straight line, it cannot meet the necessary conditions of the Archie model; and for low-resistivity oil layers, due to the influence of formation mineral conductivity or muddy additional conductivity, the resistivity curve has failed to indicate oil and gas, and the Archie formula is used to calculate the formation oil content. Saturation is meaningless

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