A staged fracturing device for unconventional reservoirs

Abstract

The invention discloses a segmented fracturing device for an unconventional reservoir. The invention adopts the method of segmented fracturing, which has high fracturing reliability, and the fracturing position of the segmental fracturing can be adjusted at any time, which is convenient for different Different positions can be fracturing, and different positions can be selectively fracturing according to the actual situation. The segmental fracturing control head mechanism of the present invention is connected with the control tube, and the segmental fracturing control head mechanism is controlled by the control tube. , to effectively ensure the ability and effect of fracturing, the feeding and feeding adjustment mechanism can also carry out axial feeding and feeding of the segmented fracturing control head mechanism, and realize that the segmented fracturing control head mechanism can control different positions in the well For staged fracturing operation, the front hydraulic expansion sleeve and the rear hydraulic expansion sleeve of the present invention are sealed with the walls of the 18 holes of the fracturing hole after expansion, so that the expansion between the front hydraulic expansion sleeve and the rear hydraulic expansion sleeve is configured as a fracturing chamber , to realize fracturing in this section, and the fracturing is simple and convenient.

Description

technical field [0001] The invention relates to a reservoir fracturing equipment, in particular to a staged fracturing device for an unconventional reservoir. Background technique [0002] my country has considerable unconventional oil and gas reserves, but the exploration and development of unconventional oil and gas is still in its infancy. In recent years, the development and utilization of shale gas and oil shale are being vigorously promoted. However, because unconventional oil and gas storage is generally located in low-permeability reservoirs, fracturing is one of the essential key processes for low-permeability reservoirs. However, since the fracturing holes are often deep, if centralized fracturing is used, it is difficult to achieve the required fracturing pressure, and the uniformity of fracturing is not good, and it is even more difficult to perform fracturing treatment on locations with poor air permeability. [0003] Therefore, the present invention provides a...

AI Technical Summary

Problems solved by technology

However, because the fracturing holes are often deep, if centralized fracturing is used, the required fracturing pressure is difficult to achieve, and the uniformity of fracturing is not good. It is even more difficult to perform fracturing treatment on locations with poor air permeability.

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