Geological Disasters Risk Assessment of Ground Gathering and Transportation Gas Pipeline in Puguang Gas Field

Abstract:

It is inevitable for long-distance oil and gas pipelines to go through the areas with complex terrain and geological conditions, where are often high-risk areas of geological disasters, and different types of geological disasters threaten the pipelines safe operation in different ways. Taking the risk assessment case of Puguang gas field ground gathering and transportation gas pipeline, (1)Establishing the risk assessment model and evaluation index system of regional pipeline geological disasters. （2）Completing the risk assessment of geological disasters for gas pipeline, dividing the risk of geological disasters along the pipeline into 5 grades from high to low risk zones. (3)According to the zoning results of the geological disaster risk assessment, the pipeline geological disasters risks are divided into 50 risk sections, including 2 highest risk sections, 14 high risk sections, 20 medium risk sections and 14 low risk sections. The evaluation results are coincident with the actual situation, which provides important auxiliary decision-making for prevention and control of geological disasters along pipeline and give reference for regional pipeline geological disasters risk assessment.

Key words:Puguang gas field; pipeline geological disasters; risk; vulnerability; risk assessment