绿色能源,世纪工程——西气东输工程

西气东输工程是国家实施西部大开发战略的重要举措.在鄂尔多斯盆地和塔里木盆地进行的大规模天然气勘探工作表明,可以为西气东输工程准备较为充分的天然气可采储量.同时,根据对河南、安徽、江苏、浙江和上海等五省市天然气需求的预测,天然气需求市场的形势良好.西气东输工程是中国境内第一条达到国际标准的大口径、高压力、长距离输气管道.通过技术攻关和高新技术的应用,西气东输工程从管材及制管、焊接、内涂敷、压缩机增压系统优化、自动化控制到流量计量和焊接的无损检测技术等方面都取得了突破性进展.西气东输工程跨越多个自然环境区和地质构造区带,在工程可行性研究中就环境保护和地质灾害的预防做了大量的研究工作,提出了一系列的保护和预防措施.

SAFE ENERGY, CENTURY'S PROJECT:THE WEST TO EAST GAS PIPELINE PROJECT

The West to East Gas Pipeline Project (WEGPP) is a great one, which transports gas from Tarim Basin and Erdos Basin to East China through pipeline. It passes Xinjiang, Gangsu, Ningxia, Shaanxi, Shanxi, Henan, Anhui, Jiangsu, Zhejiang, to Shanghai. The pipeline is installed over Gobi, desert, loess hill, mountain area, river′s net and big rivers, with complex engineering geology and constructive difficulty met rarely over the world. The whole length of the pipeline is about 3 900km. The designed annual throughput is 120×10 8m 3, with designed operational pressure 10MPa. The pipes are made of X70 armor plate, with nominal diameter 1 016mm. Over the pipeline, there are 10 compressor stations. The Supervision Control and Data Acquisition (SCADA) System acquires data, supervises, controls and disposes the gas transmission over the pipeline. The project′s construction is divided into two phases. Until beginning of 2004, at the 1st phase of the project, the gas will be transmitted from Jingbian to Shanghai through built pipeline. The gas will ignite the market demand. Until beginning of 2005, the 2nd phase of the project will be completed and the pipeline from Luntai to Jingbian will be finished. After the whole pipeline is installed, the Tarim gas field will alone supply whole throughput. For many aspects, the constructive difficulty and technical problem in WEGPP are the biggest challenge over China. For oil and gas pipeline in China, its length is the longest, the pipe′s diameter is the biggest, the pressure is the highest, and the pipeline made of X70 is applied first at China. Overcoming technical difficulty, the longitudinal welded pipes with high strength, big diameter and of high grade is first made in China. The constructive demand is satisfied through deeply studying geological, hydraulic, engineering, environment and geologic calamity along the pipeline and resolving difficulties in crossing big rivers and in tunnel through mountains. The constructive quality is assured with regular management and supervision system over the pipeline.