Method and device for distinguishing oil layers and water layers and computer-readable storage medium

Abstract

The invention discloses a method and device for distinguishing oil layers and water layers and a computer-readable storage medium, and belongs to the field of petroleum exploration. The method for distinguishing the oil layers and the water layers comprises the steps that a resistivity-resistivity ratio crossplot is drawn according to N groups of resistivity; the resistivity-resistivity ratio crossplot is divided into a water layer area, an oil-water same layer area and an oil layer area, the water layer area is divided into a high-resistance water layer and a conventional water layer, and theoil layer area is divided into a conventional oil layer, a complex pore oil layer and a low-resistance oil layer; and when the oil layers and the water layers are distinguished, a plurality of detection points are marked on the divided resistivity-resistivity ratio crossplot according to the resistivity of the detection points, and the oil layers and the water layers are distinguished according to the positions of the detection points on the divided resistivity-resistivity ratio crossplot. The detection points belonging to the high-resistance water layer, the complex pore oil layer and the low-resistance oil layer can be easily marked through the resistivity-resistivity ratio crossplot, and the accuracy of distinguishing the oil layers and the water layers is improved.

Description

technical field [0001] The invention relates to the field of petroleum exploration, in particular to a method, device and computer-readable storage medium for distinguishing oil-water layers. Background technique [0002] In the field of petroleum exploration, in order to increase the recovery rate of crude oil, it is usually necessary to distinguish the oil and water layers in the reservoir, that is, to determine whether a certain area in the reservoir is an oil layer area, an oil-water layer area or a water layer area. [0003] At present, the oil and water layers are mainly distinguished by the resistivity-porosity crossplot, wherein the resistivity-porosity crossplot refers to the graph obtained by intersecting the resistivity and porosity on the plane map, and the resistivity-porosity crossplot In is marked the oil layer line, the oil-water layer line and the water layer line drawn according to the water saturation, where the water saturation is determined by the resist...

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Problems solved by technology

[0005] In order to solve the problem of errors in the process of distinguishing oil-water layers in the target reservoir in the related art, the embodiment of the present invention provides a kind of oil-water layer distinction Method, device and computer readable storage medium

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