A method and device for cavity exploration of directional wells in salt cavern energy storage engineering

Abstract

This application discloses a method and apparatus for directional well exploration in salt cavern energy storage engineering, relating to the field of salt cavern energy storage engineering. The method includes: acquiring monitoring data of the target salt cavern during the three-stage drilling process; the monitoring data includes: trajectory data and sonar data of directional drilling performed by a directional drilling system in the horizontal, left-front, right-front, upward, and downward directions during the three-stage drilling process; the diameter of the drill bit in the directional drilling system is smaller than a set diameter; based on the sonar data, a threshold matching method or machine learning method is used to determine the salt cavern boundary and the location of the sediment and brine interface within the salt cavern; and a three-dimensional boundary model of the salt cavern is generated based on the trajectory data, the salt cavern boundary, and the location of the sediment and brine interface within the salt cavern; the thickness of the sediment and the distribution of the brine layer in the model are labeled; and the labeled model is used as the directional well exploration result of the target salt cavern. This application can accurately obtain information on the three-dimensional boundary of the salt cavern and the distribution of sediment and brine within the cavity.

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