陵水17-2深水气田开发钻井关键技术研究及应用

陵水17-2气田群为我国南海西部海域首次自营开发的深水高产大型气田，平均作业水深为1500 m。深水油气开发不仅需要克服恶劣的海上环境条件，而且面临浅部地层成岩性差、隔水导管及钻柱力学机制复杂、井控要求高等诸多技术难题。针对这些难题，采取周密的钻井技术措施，包括钻机能力评估、高精度水下定位系统、安全避让距离设计及定向井轨迹设计等，并重点应用隔水导管及水下井口稳定性分析、表层导管入泥深度校核、喷射钻进下表层导管等关键技术，安全高效地完成了钻井作业。陵水17-2项目顺利开发，进一步固化海上深水钻井安全高效的作业模式，为后续深水油气田的勘探和开发提供参考和借鉴。

Research and Application of Key Technologies in Deep Water Developing Drilling in LS 17-2 Gas Field

LS 17-2 gas field group is the first self-developed deep-water high production gas field in the western South China Sea, with an average water depth of 1500 m. Deep-water oil and gas development not only needs to overcome harsh offshore environmental conditions, but also faces many challenges such as poor diagenesis of shallow stratum, complicated mechanical behaviors of riser and drill string, high well control requirements. So elaborate drilling technical measures have been taken including drilling rig capability evaluation, high precision underwater position system, safe avoidance distance design and directional well trajectory design, etc. Meanwhile, methods such as stability analysis of riser and subsea wellhead, checking the depth of the surface conductor into the mud, conductor installation through jetting drilling are being used as key technologies in order to complete the drilling operation safely and effciently. The successful development of LS 17-2 project further solidifies the safe and efficient operation mode of offshore deep-water drilling, and provides reference for the subsequent exploration and development of deep-water oil and gas fields.