浅析油气长输管道报废处置技术要求

Analysis on the technical requirements for the disposal of abandoned long-distance oil and gas pipeline

油气长输管道的特点为线性工程,涉及面较广,途经农田、林地、环境敏感点、人员活动频繁区域、河流等,随着国内大量油气长输管道的停运废弃,长输管道的报废处置需求日渐强烈,但国内暂无相关系统科学的处置体系及标准规范。以西南地区某油气管道工程报废处置为对象,对油气长输管道报废处置技术措施及要求进行浅析。油气长输管道的报废处置技术要求主要涉及管道清洗、管道拆除、管道封存等方面,管道清洗主要包含物理清理、化学清洗及残留物浓度评估等方面;管道拆除主要考虑有科研利用价值的局部管段,包括管段需求、切割要求、运输及存放要求等方面;管道封存主要为防止管道腐蚀穿孔后雨水进入管道形成径流,破坏生态平衡或污染环境,从而采取管道注浆封存后就地废弃的处置方式。通过结合西南地区某油气管道工程报废处置方案的具体实践,为后续类似报废油气长输管道实施提供参考。

The long-distance pipeline is characterized by linear project engineering, which involves a wide range of affected areas. The pipeline normally goes through the farmland, forest land, environmental sensitive area, highly populated area, river, etc. With the shutdown of a large number of long-distance oil and gas pipelines in China, the government attaches increasing importance to the safety and environmental protection. Besides, the demand for the disposal of scrapped long-distance pipelines is growing. However, there is currently no relevant systematic and scientific disposal system and standards in China. This paper analyzes the technical requirements for the disposal of a long-distance oil and gas pipeline in southwest area. The technical requirements for disposal of scrapped long-distance oil and gas pipelines mainly involve pipeline cleaning, dismantling, and keeping in-situ after plugging, etc. The pipeline cleaning mainly involves physical cleaning, chemical cleaning and residue concentration assessment, etc. The pipeline dismantling mainly considers the localized pipeline segments with scientific research value, and introduced the requirements of pipe segments, cutting, transportation and storage, etc. The pipeline plugging is the disposal method of discarding the pipeline in-situ with grouting and plugging, mainly for preventing rainwater from entering the pipeline and forming runoff after pipeline corrosion and perforation, destroying ecological balance or polluting the environment. This practice provides reference for the disposal of long-distance oil and gas pipelines of the same nature in the future.