Novel commingled production well yield splitting method

Abstract

The invention provides a novel commingled production well yield splitting method. The novel commingled production well yield splitting method comprises the steps that 1, determining commingled production initial yield Q1 of a first development layer; 2, calculating a small-layer production contribution coefficient of the first development layer; 3, calculating an average yield correction coefficient of the first development layer according to small layers; 4, calculating the initial production and the final production of the first development layer in small layers; 5, determining initial production and final production of the second development layer in small layers; and 6, repeating the step 5, and determining the initial yield and the final yield of each sub-small layer. According to thenovel method for splitting the production of the commingled production well, the efficiency of splitting the initial production of the commingled production well according to the small layers is greatly improved, the closeness of data is guaranteed, and a rapid and effective technical support means is provided for evaluating the recoverable reserves of the small layers. Meanwhile, the method alsoconsiders two development modes of the commingled production well, and can be widely applied to the evaluation of recoverable reserves of various commingled production wells.

Description

technical field [0001] The invention relates to the field of evaluation of oil recoverable reserves, in particular to a new method for splitting production of combined oil wells. Background technique [0002] The proven oil reservoirs in China are mainly continental deposits, and most of the oil and gas reservoirs are multi-layer deposits, with obvious characteristics of many oil-bearing layers and thin single layers. In the process of oil and gas reserve development, in order to achieve the lowest initial production of the economic limit, the phenomenon of multi-layer combined production of oil wells or layer-by-layer hole filling in the later stage is very common, which makes it difficult to accurately split the development data of sub-layers. Calculation of recoverable reserves in sublayers causes great difficulties. At present, the production splitting method commonly used in China is to split the production of each sublayer according to the ratio of kh (the product of ...

AI Technical Summary

Problems solved by technology

The principle and calculation process of this method are still relatively complicated, and the production-related parameters such as water saturation and shale content of sub-layers are not considered in the calculation process.

There is also no clear statement on the overall closure of the split results and the actual data

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