A wellbore isolation method based on ionic liquid rubber plug

Abstract

The invention discloses a wellbore isolation method based on ionic liquid rubber plugs, including a wellbore isolation method based on high-strength magnetic and acoustically controlled phase change ionic liquid rubber plugs. The steps include (1) selecting the type of ionic liquid rubber plugs; (2) Select the target position P2 or F1, determine the required amount of ionic liquid rubber plug and upper working fluid; (3) select the target position P1 or F2, determine the magnetic levitation device or acoustic wave generator; (4) determine each group of ionic liquid rubber plug (5) Inject the mother liquid of the ionic liquid rubber plug (if the high-strength magnetic ionic liquid rubber plug needs to be placed in the magnetic levitation device in advance); (6) Inject the working fluid; (7) Construction work; (8) Magnetic assisted drainage and flowback Or acoustic wave phase change flowback; the invention has fixed-point positioning and targeted blocking and isolation of working fluid and production layer, complete flowback, low cost, guaranteed operation effect and zero contact and zero pollution to the reservoir.

Description

technical field [0001] The invention relates to the field of oilfield chemical gel temporary plugging and isolation, in particular to a wellbore isolation method based on an ionic liquid rubber plug. Background technique [0002] Wellbore isolation methods based on liquid rubber plugs (also known as gels) are widely used in oil and gas fields such as drilling, completion and workover operations. The conventional method of wellbore isolation with rubber plugs is to pump in the initial mother liquid of liquid rubber plugs in advance before the workover operation, and form glue at the target position to form a dense 3D network structure to isolate the working fluid from the production layer, which not only ensures that the working fluid does not leak It can also play the role of plugging water and preventing gas invasion. However, at present, this method is extremely dependent on the performance of the rubber stopper system, and there is often a risk that the cross-linking is ...

AI Technical Summary

Problems solved by technology

But as far as the current situation is concerned, this method is extremely dependent on the performance of the rubber plug system, and there is often the risk of insufficient cross-linking or cross-linking and all leakage into the formation

[0003] Conventional wellbore isolation relies on water-based liquid rubber plugs. Due to contact with the production layer, some rubber plugs will always be adsorbed and retained in the formation, affecting oil and gas production. Moreover, it is difficult to achieve targeted plugging and isolation with fixed-point positioning, and the amount used is generally too large

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