摘要
应用钻井液冷却技术来稳定地层、防止天然气水合物分解是天然气水合物开采中的一个重要课题,对此国内外都开展了大量的研究。通过介绍低温钻井液要求、冷却技术分类及钻井液冷却系统,总结了国外钻井液冷却技术研究进展及现场应用情况。综述了我国钻井液冷却技术的科技成果与研究进展。我国已初步研发出适用于国内冻土区域天然气水合物开采的钻井液冷却系统,并通过增加换热器个数、优化换热器式样来增大换热面积,达到了强化钻井液冷却效果的目的。钻井液冷却技术已在青海木里盆地和漠河盆地完成了野外试验,取得了良好的效果,成功钻获了天然气水合物。提出了钻井液冷却技术的未来发展中,我国应关注增加换热器的换热面积、载冷剂的循环使用及加强野外试验等几个方面的研究。
Applying mud cooling technology to stabilize formation and prevent natural gas hydrate deposing is an important issue for natural gas hydrate production.A lot of research has been done both at home and abroad.Based on introducing the requirements of low-temperature mud,classification of refrigeration technology and mud refrigeration system,we summed up the research progress and applications of mud cooling technology in foreign countries.We summarized the technological achievements and research progress of domestic mud cooling technology.China has preliminarily developed the mud cooling system applicable to natural has hydrate production in domestic permafrost regions.We could increase heat exchange area by adding heat exchangers and optimizing types of heat exchanger,achieving the goal of strengthening mud cooling effect.We had completed field test of the technology in Qinghai Muli Basin and Mohe Basin and obtained natural gas hydrates successfully.We proposed that China focus on enlarging heat exchange area,recycling refrigerant and strengthening field experiment in the future.
出处
《非常规油气》
2016年第1期82-86,共5页
Unconventional Oil & Gas
关键词
冻土
天然气水合物
钻井液冷却
载冷剂
低温
换热面积
permafrost
natural gas hydrate
mud cooling
secondary refrigerant
low temperature
heat exchange area
