A Well Production Splitting Method Considering Time Variation and Interlayer Interference

Abstract

The invention discloses a method for splitting oil well production considering time-varying and interlayer interference. It should be divided into different split stages; the output should be finely split, classified according to measures such as initial simultaneous perforation, partial layer acid fracturing, layer repair, partial layer plugging, etc., and at the same time, the interlayer inhibition effect of high-yield layers on low-yield layers should be considered Different calculus equations are used to quantify the liquid production and water content of each production layer before and after the measures, and the inheritance of the original layer water content. In the embodiment of the present invention, the 23-year output splitting results of 254 wells in the target block are more consistent with the production dynamics than before, and the automatic splitting and error correction processing of injection-production data are realized by using database and programming technology , Improving the timeliness and accuracy of data processing.

Description

technical field [0001] The invention belongs to the technical field of petroleum development, relates to production dynamic analysis and data splitting processing, in particular to an oil well production splitting method considering time variation and interlayer interference. Background technique [0002] Oilfield development has entered the middle and later stages, and the relationship between oil and water is complicated, and the logging curves have long not reflected the current distribution of underground oil and water. To understand the distribution of oil and water in a single layer, the only way to draw an oil level distribution map is to split the production into small layers. The impact of measures on production and water cut can directly reflect the liquid supply and increase capacity of the measure layer. At the same time, the high-yield layer will increase the flow pressure gradient in the well, and the bottom hole flow pressure will increase. The production pres...

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Problems solved by technology

[0003] The traditional KH coefficient production splitting method assumes that all effective thickness formations have oil, and the production splitting is performed according to the ratio of the permeability of each production layer multiplied by the effective thickness. This method has fewer considerations and can only be adapted to ideal formations. KH The splitting method does not fully consider the connectivity, pressure difference, and material and energy balance of the reservoir, and its parameters are relatively single. Its limitations mainly include the following aspects:

[0004] 1. The splitting interval span is large, and the production stages are divided by year, not by the time of measures, which is inaccurate;

[0005] 2. Splitting does not combine production dynamics and consider interlayer interference;

[0006] 3. The moisture content of each layer uses the same fixed value, without considering the inheritance of moisture content

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