Well cementing method, device and storage medium

Abstract

The application discloses a cementing method, a device and a storage medium, which belong to the technical field of oil and gas field drilling. In this application, the safe density window of the well section to be sealed is determined, and then the displacement range of the slurry column and the actual slurry column structure are determined, and then the displacement efficiency and the displacement efficiency of the well section to be sealed and the actual slurry column structure are determined based on the displacement range of the slurry column and the actual slurry column structure. The annulus dynamic equivalent density of each cementing stage at the preset well depth, so that the annular dynamic equivalent density of each cementing stage at the preset well depth is less than the maximum boundary density of the safe density window to avoid the possibility of leakage. Then, based on the dynamic equivalent density of the annulus at the preset well depth in each cementing stage and the minimum boundary density of the safe density window, the wellhead pressure control value at the preset well depth in each cementing stage is determined, so that the wellhead pressure can be controlled through the wellhead. The value controls the wellhead pressure, so that the dynamic equivalent density of the annulus at the preset well depth in each cementing stage is greater than the minimum boundary density of the safe density window, thereby avoiding the possibility of gas intrusion.

Description

technical field [0001] The present application relates to the technical field of oil and gas field drilling, and in particular, to a cementing method, device and storage medium. Background technique [0002] Cementing is an indispensable part of drilling operations. Cementing refers to injecting cement slurry into the annular space between the wellbore and the casing during the drilling process to seal the well section to be sealed by the cement slurry, thereby sealing off the oil layer, gas layer or water in the well section to be sealed. layer job. Among them, the wellbore refers to the space enclosed by the wellbore of the oil and gas well. [0003] In the related art, conventional cementing methods are generally used for cementing. Specifically, the slurry column structure of the cement slurry is determined according to parameters such as the downhole static formation pressure collected during the drilling process and the depth of the well section to be sealed, and th...

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Problems solved by technology

[0005] This application provides a cementing method, device and storage medium, which can solve the problems of cement slurry leakage or gas invasion in cementing

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