Production tubular column for rhythm oil layer gravity gas drive and method thereof

Abstract

The invention discloses a production tubular column for rhythm oil layer gravity gas drive and a method of the production tubular column, and relates to the technical field of oil development and reservoir. The production tubular column is arranged inside an underground oil sleeve and comprises at least one group of low-seepage assemblies, wherein a sealed short circuit is connected on the low-seepage assemblies; a sealing ring is arranged on the upper surfaces of the low-seepage assemblies; the sealing ring is pressed and sealed in the oil sleeve by the sealed short circuit; the upper end of the sealed short circuit is communicated with an exhaust oil tube short circuit; an oil well pump is arranged on the upper end of the exhaust oil tube short circuit; a plurality of exhaust holes are arranged on the side wall of the exhaust oil tube short circuit; and a fluid channel which is communicated with the sealed short circuit is arranged on the upper parts of the low-seepage assemblies. With the adoption of the production tubular column, a gas channelling phenomenon when an individual oil layer injects gas to drive oil can be restrained, so that the gas injection oil driving process is continuously performed, and the production is simultaneously performed in a plurality of oil layers.

Description

technical field [0001] The invention relates to a production string in the technical field of oil development reservoirs, in particular to a production string for gravity gas flooding in rhythmic oil layers and a method thereof. Background technique [0002] At present, in the field of petroleum development, the development of rhythmic oil layers is often dominated by water injection displacement. The disadvantage is that the injected water forms channels in the high-permeability layer and rarely affects the medium and low-permeability layers, resulting in high water content in the oil layer and invalid injection water. Happening. A large number of experiments and small-scale tests have proved that the gravity gas flooding technology is helpful to the development of such reservoirs. This gravity gas flooding technology utilizes the density difference between gas and fluid (crude oil and water) to realize the downward drive of gas to fluid, thereby effectively producing medi...

AI Technical Summary

Problems solved by technology

When changing the production layer, the matching production string needs to be changed many times, and the downhole plugging and perforation work is frequent

[0004] 2. Gas channeling is still difficult to control when gas injection drives oil in a single oil layer

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