针对东海西湖凹陷低孔低渗储层埋藏深、深探井钻井周期长的问题,通过分析表层套管和技术套管的最大下入深度的可行性,优化了深探井井身结构,形成了一套适合于该区域的深探井井身结构和套管程序体系。应用效果表明,优化后的深探井井身结构中表层套管、技术套管、生产套管等下深均有明显增加,较大幅度地缩短了钻井周期,降低了钻井成本,可为低孔低渗深探井井身结构设计提供参考。 Aiming at the problem of long drilling period in burial deep and deep exploration wells in low porosity and permeability reservoirs in Xihu Sag, East China Sea, by analyzing the feasibility of maximum depth of surface casing and technical casing, the well structure of deep exploration well is optimized and a Set suitable for deep exploration wells in the region well casing structure and casing system. The application results show that the optimized depths of surface casing, technical casing, production casing and so on in the deep well exploration well obviously increase, greatly shorten the drilling cycle and reduce the drilling cost, and can be low pore Low permeability deep well borehole structure design reference