京58地下储气库群潜山型地下储气库完井工艺技术

Well Completion Technology for Buried Hill Underground Gas Storage of Jing58 Underground Gas Storage Group

华北京58地下储气库群首座储气库是在永22构造高含硫化氢、潜山构造上建立的,它不同于枯竭油气田型储气库和常规潜山储气库等完井工艺,有效地解决了高压、高含硫、水平完井的技术难题。对井筒环境、压井液都作了优化,彻底冲洗产层段,对原有屏障层化学降解,酸化,直至放喷测试,保证储气库长期有效正常运行。

The first gas storage of jing58 underground gas storage groups in north-china is built at Yong22 structure with high content of hydrogen sulfide and buried hill construction whose well completion technologyis different from the depleted oil and gas-based gas storage and conventional buried hill gas storage,solving technical problems of the high-pressure,high sulfur content,completion for horizontal well effectively.By optimizing the bore hole environment and killing fluid,washing production layer thoroughly,chemical degradation,acidification are taken to the original barrier layer until the release spray testing is conducted to ensure the gas storage running long-term effectively.