漠河冻土地区天然气水合物钻探施工技术

Drilling Construction Technology of Gas Hydrate in Mohe Permafrost Region

摘要:

天然气水合物是一种清洁的潜在资源，漠河冻土地区为天然气水合物的形成提供了有力的条件。根据当地的地质条件和水合物勘探开发的技术要求，确定相应的钻孔结构和钻进技术参数，合理选择了钻探设备。钻进过程中运用低温泥浆、泥浆冷却技术、大直径绳索取心钻进工艺，快速获得岩心，从而减少水合物的分解，为以后该地区天然气水合物的勘探提供了经验。阐述了漠河冻土地区天然气水合物钻探施工中的钻进关键技术。

Abstract:

Gas hydrate is a potential clean resource. There are strong conditions in Mohe permafrost region for gas hydrate formation. According to the local geological conditions and the technical requirements of hydrate exploration and development, the appropriate borehole structures and drilling parameters were determined, and drilling equipments were rationally selected. Low-temperature drilling mud, drilling mud cooling technology and large diameter wire-line coring drilling were applied in drilling process for rapid coring to reduce the decomposition of gas hydrate. The paper described the key technologies of drilling construction for gas hydrate in Mohe permafrost region.