1. Working environment and working nature: Petroleum operations usually need to work in harsh environmental conditions, such as high temperature, high pressure and harmful gases, which have a negative impact on employees' health and increase the risk of chronic diseases.
2. Long-term manual labor: petroleum operations require long-term manual labor, such as carrying heavy objects and operating heavy equipment. This kind of high-intensity physical labor leads to physical fatigue and injury, which increases the possibility of suffering from chronic diseases.
3. Irregular working hours and living habits: The working hours of oil operations are in shifts, and irregular working hours of employees are likely to lead to lack of sleep and unhealthy living habits, which is closely related to the occurrence and development of chronic diseases.