Research and Application of Acid Fracturing Technology for Immobile String in Oil and Gas Wells Offshore
The proportion of low-permeability reserves in oil and gas fields offshore is large,and production is decreasing rapidly.Acidizing transformation is the main production increase measure for low-permeability oil and gas fields offshore.However,there are problems such as complex construction processes,long operation cycles,high costs,and new pollution caused by well killing and washing operations for wells that have already been put into production.Deep acidizing transformation can be achieved to protect reservoirs and improve permeability channels by optimizing composite organic acids.Isolating wellhead Christmas trees and avoiding contact with acid liquids by inventing wellhead protection devices.In response to the operational environment of various decks on the sea,an acidizing transformation process for immovable pipes in oil and gas wells offshore is formed by optimizing the acid fracturing process.This acid fracturing process has been implemented in multiple offshore wells with immobile string acidizing,resulting in significant production increase.It provides technical guidance for the acidizing transformation of low-permeability reservoirs offshore.
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维普
