A fine temporary plugging volume fracturing technology instead of mechanical packing

Abstract

The present invention proposes a fine temporary plugging volume fracturing technology that replaces mechanical isolation, including: S1. Carry out comprehensive research on reservoir geology, determine oil and gas-enriched layers as key reformed segments, and unevenly segment ; S2. Carry out fracturing on key oil and gas enrichment stimulation sections, fracturing to open multiple fractures, and less fracturing or no fracturing on layers with poor or very poor physical properties; S3. Automatically select oil and gas storage areas for each fracture ; S4. Temporary blocking of fractures within the segment creates multiple fractures to achieve intensive cutting; S5. Interference between fractures forms a complex network of fractures; S6. Temporary plugging of fractures opens micro-fractures and creates new branch fractures. The process of the present invention realizes stratified fracturing through the mode of fine temporary blocking layer under the condition that no mechanical isolation equipment needs to be lowered. At the same time, this process can effectively increase the net pressure through temporary plugging in the fracture, form branch fractures in the fracture, effectively improve the producing degree of the vertical profile of a single well, and increase the production of a single well.

Description

technical field [0001] The invention relates to the technical field of oil reservoir development, in particular to a fine temporary plugging volume fracturing technology instead of mechanical sealing. Background technique [0002] When fracturing oil and gas wells in multiple sets of reservoirs, mechanical isolation is generally used to achieve layered fracturing. However, in practical applications, traditional mechanical isolation may have the following problems: [0003] 1. The natural fractures in the reservoir are not developed, and the artificial main fractures of conventional fracturing are mainly relatively single plane fractures, which have a limited degree of production of the reservoir; [0004] 2. There are many small layers of perforation, large spans, and large differences between layers, and the degree of layering transformation of a single mechanical packer is not sufficient; [0005] 3. The layered design is restricted by the distribution of production layer...

AI Technical Summary

Problems solved by technology

[0003] 1. The natural fractures in the reservoir are not developed, and the artificial main fractures of conventional fracturing are mainly relatively single plane fractures, which have a limited degree of production of the reservoir;

[0004] 2. There are many small layers of perforation, large spans, and large differences between layers, and the degree of layering transformation of a single mechanical packer is not sufficient;

[0005] 3. The layered design is restricted by the distribution of production layers, perforation and interlayer conditions, the structure of the pipe string is complex, and the risk of fracturing construction and operation control is relatively high;

[0006] 4. In order to ensure the sliding sleeve, the overhead effect is difficult to overcome

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