Acid liquor effective action distance calculation method considering wormhole filtration

Abstract

The invention discloses an acid liquor effective action distance calculation method considering wormhole filtration. The acid liquor effective action distance calculation method comprises the following steps: S1, calculating a wormhole total filtration coefficient through a compressibility filtration coefficient, a wall building filtration coefficient and a wormhole viscosity filtration coefficient; S2, calculating the average filtration velocity through the total filtration coefficient and the construction time, and calculating the dynamic fracture length through the displacement, the fracture height and the construction time; S3, calculating the average width of the fracture according to the viscosity of the acid liquor, the displacement, the dynamic fracture length, the fracture height and the elastic modulus of the rock, and calculating the Picrit number according to the hydrogen ion mass transfer coefficient, the average filtration velocity and the average fracture width; and S4, obtaining a corresponding dimensionless effective operating distance according to the Picinct number query correlation chart, calculating the average flow velocity of the fracture inlet end through the displacement, the average fracture width and the fracture height, and finally calculating the effective operating distance of the acid liquor according to the dimensionless effective operating distance, the average flow velocity, the average filtration velocity and the average fracture width of the fracture inlet end.

Description

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AI Technical Summary

Benefits of technology

The technical effect of this patented technology lies within its ability to compress filter out large amounts of liquid during oil production processes without causing damage or reducing productivity. It also predicts how well it will perform over time based on factors like pressure drop caused by pumping fluids through pipelines. This helps with efficient operations for producing crude oils from subterranean formations.

Problems solved by technology

This patented technical problem addressed in this patents relates to accurately determining how long the acid solutions should stay inside the wellbore after being introduced into the formation through injection or other means such that they can effectively attack any cracks made on top of them without causing damage.

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