Tubular column and method for abrasive perforation and soluble bridge plug united double-cluster fracturing

Abstract

The invention provides a tubular column for abrasive perforation and soluble bridge plug united double-cluster fracturing. The tubular column comprises a hollow first spraying gun, a hollow second spraying gun, a first sliding sleeve, a second sliding sleeve, a setting tool and a soluble bridge plug. A first nozzle and a second nozzle are arranged on the side wall of the first spraying gun and theside wall of the second spraying gun correspondingly, and the first sliding sleeve and the second sliding sleeve are arranged in the first spraying gun and the second spraying gun correspondingly. The first sliding sleeve and the second sliding sleeve are constructed to be fixed by a first pin and a second pin correspondingly under the initial state to close the first nozzle and the second nozzle. The setting tool and the soluble bridge plug are sequentially connected to the downstream end of the second spraying gun. The first sliding sleeve and the second sliding sleeve can open the first nozzle and the second nozzle under the action of set pressure to carry out perforation and fracturing construction. Resistance reducing layers for reducing the resistance of the first sliding sleeve andthe second sliding sleeve are arranged on the inner wall of the first spraying gun and the inner wall of the second spraying gun. Reinforcing layers resistant to corrosion and abrasion are arranged on the outer wall of the first spraying gun, the outer wall of the second spraying gun, the surface of the first nozzle and the surface of the second nozzle. The invention further provides a method forabrasive perforation and soluble bridge plug united double-cluster fracturing.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas exploitation, in particular to a pipe string used for double-cluster fracturing in combination of abrasive perforation and soluble bridge plug. The invention also provides a method for double-cluster fracturing in combination of abrasive perforation and soluble bridge plug. Background technique [0002] With the rapid development of my country's economy, the demand for oil and gas resources is increasing. However, the probability of discovering conventional oil and gas reservoirs is getting smaller and smaller, and the development of unconventional low-permeability oil and gas reservoirs with abundant reserves has received more and more attention. Taking natural gas as an example, in 2016, my country's newly added conventional gas in place reserves were 654 billion cubic meters, of which low-permeability gas and tight gas accounted for 73%. Low-permeability oil and gas reservoi...

AI Technical Summary

Problems solved by technology

And by setting the reinforced layer film formed by graphene / boron nitride nano-multilayer film on the outer wall surface of the spray gun, the outer surface of the pup joint and the surface of the nozzle of the pipe string, it solves the problem of abrasive impact on the abrasive perforation jet fracturing process. Abrasion issues on tool surfaces and nozzles

Images