摘要
我国深层煤层气储层因物性复杂、非均质性强,导致钻井过程中面临固相颗粒损害、水锁效应和敏感性损伤三大技术难题。研究表明:固相损害主要由钻井液颗粒、煤粉迁移及聚合物残留引发,水锁效应通过水分滞留形成井周水相圈闭带抑制产气,敏感性损伤表现为水敏性矿物膨胀与应力敏感导致裂缝闭合;针对固相损害控制采用无固相体系、成膜封堵、强化携岩及可降解材料,防水锁剂及酸化压裂技术可极大降低水锁效应的发生,强抑制聚胺钻井液、微泡沫钻井液及纳米封堵技术可显著缓解敏感性损伤;未来发展方向聚焦智能材料(自修复封堵剂、光子晶体传感)研发、数字孪生及AI技术与钻井液技术的深度融合、绿色钻井液体系创新应用,最终为深层煤层气高效开发及“双碳”目标实现提供技术支撑。
Due to the complex physical properties and strong heterogeneity of deep coalbed methane reservoirs in China,the drilling process is faced with three technical problems:solid particle damage,water lock effect and sensitivity damage.The results show that:Solid particle damage is mainly caused by the migration of drilling fluid particles,pulverized coal and polymer residues;the water lock effect inhibits gas production by forming a water phase trap zone around the well through water retention.Sensitivity damage is manifested as water-sensitive mineral expansion and stress sensitivity leading to fracture closure;For solid particle damage control,solid-free system,film-forming plugging,enhanced rock carrying and degradable materials are used,water lock agent and acid fracturing technology can greatly reduce the occurrence of water lock effect.Strong inhibition polyamine drilling fluid,micro-foam drilling fluid and nano-plugging technology can significantly alleviate sensitive damage;The future development direction focuses on the research and development of intelligent materials(self-healing plugging agent,photonic crystal sensing),the deep integration of digital twin and AI technology with drilling fluid technology,the innovative application of green drilling fluid system,and finally provides technical support for the efficient development of deep coalbed methane and the realization of"double carbon"target.
作者
程智
陈新海
李东杰
窦幻君
陈玉杰
白杨
于建涛
吴刚
CHENG Zhi;CHEN Xinhai;LI Dongjie;DOU Huanjun;CHEN Yujie;BAI Yang;YU Jiantao;WU Gang(Engineering Technology Research Institute,CNPC Bohai Drilling Engineering Company Limited,Tianjin 300452,China;China Petroleum Huabei Oilfield Company,Exploration Department,Renqiu,Hebei 062550,China;China Petroleum Huabei Oilfield Company,Development Department,Renqiu,Hebei 062550,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploration,Southwest Petroleum University,Chengdu,Sichuan 610500,China)
出处
《钻采工艺》
北大核心
2025年第3期219-226,共8页
Drilling & Production Technology
基金
国家自然基金项目“深井、超深井水基钻井液失水造壁性与流变性调控机理研究”(编号:52274008)
国家重点研发课题“井筒稳定性闭环响应机制与智能调控方法”(编号:2019YFA0708303)。
关键词
煤层气
储层损害
钻井液
储层保护
发展趋势
coalbed methane
reservoir damage
drilling fluid
reservoir protection
development trends
