W-S saturation evaluation method

The invention discloses a W-S saturation evaluation method. The method comprises the following steps: calculating water saturation based on a W-S saturation equation, wherein the cation exchange capacity QV is calculated by using a normalization method, and/or the cementation index m is a variable c...

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Bibliographic Details
Main Authors ZHAO JUNFENG, HOU LIYUN, PENG TINGTING, LING ZHIHONG, LI SHANSHAN, LI FENGQIN
Format Patent
LanguageChinese
English
Published 17.12.2021
Subjects
CALCULATING
COMPUTING
COUNTING
DETECTING MASSES OR OBJECTS
ELECTRIC DIGITAL DATA PROCESSING
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
TESTING
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Summary:The invention discloses a W-S saturation evaluation method. The method comprises the following steps: calculating water saturation based on a W-S saturation equation, wherein the cation exchange capacity QV is calculated by using a normalization method, and/or the cementation index m is a variable cementation index calculated according to the fracture development degree; and calculating the oil saturation based on the water saturation. The scheme has the beneficial effects that 1, the problem in determining the cation exchange capacity (QV) in the W-S model is solved by using a normalization method, so that the influence of the shale content is eliminated; and 2, based on the variable cementation index (m) method, the influence of the crack on the oil saturation is converted into the influence of the cementation index (m) on the oil saturation, the influence of the crack on the oil saturation is eliminated, and the variable cementation index (m) method solves the problem of evaluation of the oil saturation of
Bibliography:Application Number: CN202010542736