Method for controlling in-place oil invading shaft by utilizing underground hydrocarbon detection technology

Abstract

The invention provides a method for controlling in-place oil invading a shaft by utilizing an underground hydrocarbon detection technology. The method can comprise the following steps that whether in-place oil invades the shaft or not is monitored in real time through an underground hydrocarbon detection tool in the drilling process, the current working condition is maintained unchanged when no in-place oil invades the shaft, it is judged that the well bottom pressure is less than the formation pressure when in-place oil invades the shaft, the well bottom pressure is adjusted till no in-placeoil invades the shaft, an empty tank is prepared on the ground to receive drilling liquid containing in-place oil, crude oil floating on the surface of the drilling liquid is removed after standing, and the drilling liquid without in-place oil continues to participate in circulation. The method has the beneficial effects that whether in-place oil enters the shaft or not can be found in the first time, the well bottom pressure is rapidly changed through ground control equipment to force the in-place oil not to enter the shaft, the in-place oil entering the shaft is discharged out of the shaft,and the purpose of safe and efficient drilling is achieved.

Description

technical field [0001] The invention relates to the technical field of oil and gas well drilling safety, in particular to a method for controlling formation crude oil intruding into a wellbore by using downhole hydrocarbon detection technology. Background technique [0002] At present, formation crude oil in the drilling field is mainly detected through the surface circulation system to detect the change in the level of the drilling fluid pool to determine whether the overflow has occurred. The volume of crude oil will not change drastically until it is transported about 1000m above the ground, and the liquid level will fluctuate. The actual overflow has already occurred and is already very serious. In high-pressure gas reservoir drilling, the time from liquid level change to blowout is very short, only 5-10 minutes from overflow to blowout, sometimes even overflow and blowout occur simultaneously. Therefore, it is of subversive significance to reduce the well control time ...

AI Technical Summary

Problems solved by technology

[0002] At present, formation crude oil in the drilling field is mainly detected through the surface circulation system to detect the change in the level of the drilling fluid pool to determine whether the overflow has occurred. The volume of crude oil will not change drastically until it is transported about 1000m above the ground, and the liquid level will fluctuate. The actual overflow has already occurred and is already very serious