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On July 18, good news came from the China National Intellectual Property Administration that the Method and Device for Determining the Amount of Preflush Fluid declared by the Engineering Technology Research Institute of Southwest Oil and Gas Field Company was granted a national invention patent with the authorized patent number of ZL202110212940.7.

Preflush acid fracturing is a deep acid fracturing process for low permeability Carbonate rock, and its amount of preflush is a key parameter that determines the effect of acid fracturing. This authorized patent protects a method for determining the amount of pre liquid and related devices. This patent determines the target temperature for acid rock reaction and the maximum injection rate of the pre fluid through research, and then calculates a function based on the bottom hole temperature to determine the amount of pre fluid. The amount of pre liquid determined by this method is highly targeted, efficient, and significantly improves the transformation effect.

At present, this technology has been widely used in the parameter optimization of deep and ultra deep Carbonate rock reconstruction, helping to improve the effect of single well reconstruction.


Post time: Jul-20-2023