Method and device for determining main horizon of multi-layer oil reservoir, equipment and storage medium

Abstract

The embodiment of the invention discloses a method and device for determining a main horizon of a multi-layer oil reservoir, equipment and a storage medium. The method comprises the steps that a sample data table composed of yield data and variable data in historical data records of a target oil field within target production time is established, wherein the yield data comprise oil production andwater production, and the variable data comprise production time data, main influence factor data and open and close layer state data sets of at least two target horizons; fitting is performed on thesample data table based on an elastic network algorithm, and an obtained fitting model comprises an oil production contribution coefficient and a water production contribution coefficient of each target horizon; and the target horizon with the oil production contribution coefficient greater than the first threshold is determined as a main oil production layer. According to the embodiment of the method and device for determining the main horizon of the multi-layer oil reservoir, the equipment and the storage medium, based on the elastic network algorithm, the fitting model capable of accuratelypredicting the oil field yield is established, the main oil production and water production horizons of the multi-layer oil reservoir are determined according to the fitting model, the horizon yieldtest cost is reduced, and the main horizon determination accuracy is improved.

Description

technical field [0001] The embodiments of the present invention relate to the field of computer technology, and in particular to a method, device, equipment and storage medium for determining the main layer of a multi-layer oil reservoir. Background technique [0002] At present, the development of vertical multi-reservoir oilfields mostly adopts multi-layer commingled production or stratified series production. For oil fields with a large number of layers, it is impossible to fine-tune the development of each reservoir layer by layer. Therefore, in order to guide the determination of perforation layers in new wells and implement water shutoff measures in high water-producing layers of old wells, it is necessary to identify the main contributing layers for oil and water production. [0003] In the existing technology, the oil production and water production of each layer are mostly obtained through the liquid production profile test, but the liquid production profile test is...

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Problems solved by technology

[0003] In the existing technology, the oil production and water production of each layer are mostly obtained through the liquid production profile test, but the liquid production profile test is expensive, it is difficult to test every well, and some wells are not suitable for liquid production due to the wellbore technology Profile testing has resulted in the inability to judge the main oil-producing layers in many multi-layered reservoirs. It is impossible to guide the drilling of layers for infill wells in the later stage of the oilfield, and it is impossible to effectively take measures to shut off water for the high water cut of old wells. Old oilfields that have been producing for many years can pass Production data combined with perforation history to comprehensively evaluate the impact of perforation layers on production curves. However, the perforation history of old oilfields is complex, there are many perforation layers, and many layers are perforated in batches, so it is very difficult to analyze artificially

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