Consolidation type temporary plugging agent and temporary plugging method

Abstract

The invention discloses a consolidation type temporary plugging agent and a temporary plugging method. The consolidation type temporary plugging agent comprises a thick wire, a middle wire, a thin wire and a connecting body; the thick wire, the middle wire and the thin wire are respectively connected with the connecting body to form a whole; and the diameters of the thick wire, the medium wire and the thin wire are sequentially reduced, and the lengths are sequentially increased. The temporary plugging agent is not limited in applicable working conditions and applicable well types. The use amount of the consolidation type temporary plugging agent is small, and the use amount of the consolidation type temporary plugging agent and a plugged hole are basically designed according to a ratio of 1:1. Different numbers, different sizes, different distribution modes and different materials of the thick wires, the middle wires and the thin wires are matched, the thick wires, the middle wires and the thin wires are integrally designed with the connecting body, falling is not prone to occurring, and the temporary plugging effect is better; the technological process is more simplified and is put in one place; self-degradation can be achieved according to needs, and damage to a reservoir is small; and the consolidation type temporary plugging agent can be prefabricated and is convenient to transport.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation engineering, in particular to a consolidated temporary plugging agent and a temporary plugging method. Background technique [0002] At present, more than 60% of the new reserves in China are low-permeability and hard-to-produce reserves, and the exploitation of unconventional oil and gas such as shale oil and gas and tight oil and gas is increasingly becoming the main target of various oilfield companies. Fracturing and acidizing reservoir stimulation technologies are the main means to exploit such unconventional oil and gas reservoirs, and staged fracturing and acidizing stimulation technologies are the only way to achieve targeted reservoir stimulation. [0003] Existing technologies for segmental transformation are generally divided into mechanical methods and chemical methods. The commonly used tools in the mechanical method are packers or bridge plugs, which are expensive, ...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned temporary plugging technology is basically based on the friction accumulation (or bridging and enrichment) of temporary plugging particles or fibers in the fracture or the opening (blasthole) to form bridge plugging, but accumulation or enrichment is a fuzzy process, and it is impossible to determine the temporary plugging Timing and location, and also due to the loss of temporary plugging agent, the thickness of temporary plugging formed through accumulation cannot be determined, so the strength and effect of temporary plugging are difficult to guarantee, which affects subsequent fracturing to open new fractures

In addition, the traditional temporary plugging fracturing technology basically determines the amount of temporary plugging agent added according to the change of ground construction pressure, so it is necessary to prepare excessively in advance on the ground, resulting in waste

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