莲103断块常规井井身结构优化设计及应用 Casing Program Optimization & Application of Lian103 Block Conventional Well

莲103断块位于福山凹陷白莲构造带，油藏埋深2800 m，平均井深3120 m左右，钻探表明该区块主要发生井漏、卡钻及完井电测遇阻等井下复杂事故[1]。为了加快推进产能建设，进一步降低钻井投资成本，剖析井身结构优化设计理论基础[2]，总结分析邻井实钻情况、开展钻头个性优选设计及加强钻井液入井材料检测等措施。在保证能够实现地质目的的前提下，针对井身结构优化方案，对将三开井身结构调整为二开井身结构的可行性进行了简述，结合施工情况，分两步走实施，确保安全顺利钻井，提高钻井速度，缩短钻井周期，取得了显著效果。对福山油田类似断块推广应用具有重要的参考借鉴意义。 The Lian103 block is located in Bailian Tectonic belt of Fushan sag. Reservoir buried depth is 2800 m. The average well depth is about 3200 m. Drilling indicated that there were lost circulation, sticking and logging blocking etc in the block. In order to accelerate the construction of productivity, reduce drilling cost of investment, we researched theoretical basis of casing program optimization, analyzed real drilling circumstance of adjacent well, bit personalized optimization, strengthened test of mud etc. Ensuring Geological purpose, we case program optimization, briefly analyze application condition of the three sections well changing in two sections well. In order to drill safety, we shorten drilling cycle, and improve ROP, summarize construction of adjacent well, to carry two steps. It is an important reference for application of similar fault block in Fushan Oilfield.