Application

The plugging technology for coalbed methane drilling in complex strata in coal mining areas is an important technology in the field of coal mining. In the process of coal mining, especially in complex strata, the problem of drilling leakage often troubles the mining team, which not only affects the progress of the project, but also may cause environmental pollution and economic losses. Therefore, it is particularly important to study and apply effective plugging technology.

The characteristics of complex strata often include complex geological structures, uneven rock strength, and crack development, all of which increase the risk of drilling leakage. For example, in the case of high-pressure Ordovician lime water under the bottom plate of the coal seam, once the bottom plate is damaged, the Ordovician lime water will flow into the wellbore under the action of high water pressure, and even flow into the remote tunnel through the cracks in the coal seam, causing serious consequences.

In response to this problem, researchers and engineers have developed a series of plugging technologies. Plugging is a commonly used method to plug the leaking point by injecting cementitious materials such as cement slurry or mortar near the leaking point. In addition, drilling fluid thickener treatment, ultrasonic plugging and high temperature and high pressure plugging are also effective means. The selection and application of these methods need to be considered comprehensively according to multiple factors such as the location of the leaking point, the amount of leaking, and the formation conditions.

In practical applications, these plugging processes have achieved remarkable results. For example, in a coal mining area, the problem of water gushing in the well leakage tunnel was successfully solved by adopting a comprehensive plugging solution, ensuring the normal progress of drilling work. At the same time, the application of these processes also improves drilling efficiency, reduces the occurrence of accidents in the hole, and achieves safe production.

In the future, with the continuous advancement of coal mining technology and the continuous development of coalbed methane resources in complex formations, the research and application of plugging technology for coalbed methane drilling in complex formations in coal mining areas will continue to deepen. By continuously optimizing process parameters, improving material properties, and strengthening on-site management, the plugging effect will be further improved, providing a safer and more efficient technical guarantee for coal mining.