我国幅员辽阔,各种能源资源在地域分布上都具有不同程度的不平衡性,如水资源东多西少、南多北少,石油天然气等东少西多……为满足各地的能源需求,就有了西气东输这样的能源输送工程。管道作为现代五大运输方式之一,承担着我国能源输送的重要任务,70%的原油、99%的天然气需要依靠管道运输,因而石油天然气管道被称为能源输送的“命脉”。我国现已有规模较大、跨国境和跨区域的输油气干线管网,对 China has a vast territory and all kinds of energy resources have different degrees of imbalance in geographical distribution. For example, there are less water in the east and west, less in the south and less in the north, oil and natural gas, etc. In order to meet the energy needs of various places, With such a West-East gas transmission project. As one of the five modern modes of transport, the pipeline plays an important role in energy transportation. 70% of the crude oil and 99% of the natural gas are transported by pipeline. Therefore, the oil and gas pipeline is called the “lifeline” of energy transmission. There are now large-scale, cross-border and trans-regional oil and gas pipelines in our country