Resistance-increasing oil extraction device capable of improving utilization rate of injected gas and manufacturing method thereof

Abstract

The invention provides a resistance-increasing oil extraction device capable of improving the utilization rate of injected gas and a manufacturing method thereof. The device is arranged at the position, communicating with an oil layer, in an oil production well and comprises an upper packer, a resistance increasing mechanism and a lower packer which are sequentially connected from top to bottom, wherein the resistance increasing mechanism comprises a connecting pipe and a resistance increasing sleeve, the upper end and the lower end of the connecting pipe are connected with the upper packer and the lower packer respectively, a plurality of through holes are formed in the connecting pipe in the radial direction, the resistance increasing sleeve is arranged on the outer side of the connecting pipe in a sleeving mode and covers all the through holes, oil can penetrate through the resistance increasing sleeve in the radial direction of the resistance increasing sleeve, resistance borne bythe oil in the flowing process can be improved, and the upper end and the lower end of the resistance increasing sleeve are closed. The method is used for manufacturing the device. According to the device and the method, when the device manufactured through the method is applied to the oil well development process, the gas channeling phenomenon can be effectively reduced, and the oil recovery rateis increased.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a resistance-increased oil production device and a manufacturing method thereof for improving the utilization rate of injected gas. Background technique [0002] At present, waterflooding is still the main development method for low-permeability and ultra-low-permeability reservoirs, but the low permeability leads to problems such as difficult injection and low recovery degree. Due to the easy injection of gas, the application of gas injection technology in this type of reservoir is gradually increasing. Gas injection development has two major advantages over water injection. One is that the gas seepage resistance is small, and the injected water cannot enter the low-permeability pores under relatively low pressure, thereby expanding the swept volume; , when a certain seepage condition is met, the gas accumulates at the top of the reservoir and slowly drives the c...

AI Technical Summary

Problems solved by technology

This not only loses the energy of the injected gas, but also the degree of plugging is difficult to achieve a good effect

Another method is to add gas anchors and other equipment in the oil production well, but its function is only to separate the gas and liquid in the wellbore, and cannot prevent the gas channeling itself.

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