Sand-discharge oil production method and equipment

Abstract

The present invention provides sand-discharge oil production method and equipment. The driving liquid is fed to downhole hydraulic jet pump so that the mixed liquid of the driving liquid and stratum liquid is pumped to ground via the mixed liquid pipe with small cross section. The tail pipe in the lower part of the hydraulic jet pump is locked to the inner wall of well. The method and equipment of the present invention can produce oil in a simple process with high yield and low cost.

Description

technical field [0001] The invention relates to a crude oil extraction method and a device thereof, especially a crude oil extraction method in a sand producing oil reservoir. Background technique [0002] In the process of crude oil extraction, due to the influence of factors such as oil layer structure, crude oil physical properties, formation water composition, etc., oil recovery methods and devices must adapt to the requirements of various oil reservoirs such as sand production, wax content, water corrosion, and oil thickness. Sand production in oil reservoirs is regarded as the first factor affecting crude oil production. Sand-producing reservoirs are widely distributed and difficult to control. Many oil reservoirs with rich reserves are unable to produce normally or even shut down due to sand production. At present, sand control methods are adopted for most of the production of sand-producing reservoirs, that is, to prevent formation sand from flo...

AI Technical Summary

Problems solved by technology

Due to the large cross-sectional area of ​​the annular space, the flow rate of the mixed fluid in the annular space is slow, and the sand part of the oil layer sinks and falls on the packer, causing the sand of the packer to be buried.

This will cause the oil well to be overhauled and the pump to be pumped up, and the sand from the oil layer will enter the jet pump, block the flow channel, and the pumping operation cannot be carried out.

Furthermore, due to the large pressure difference between the upper and lower sides of the packer, the packer is prone to failure and the oil well is shut down

In addition, due to the existence of the packer, the upper and lower sides of the packer cannot be connected, and the oil well performance cannot be observed through the casing, and the casing pressure and dynamic liquid level data of the oil well cannot be recorded.

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