海上复杂结构井压裂管柱优化设计

Optimization of Fracturing String in Offshore Complex Structural Well

由于海上油田油层埋藏深、井身结构复杂、施工场地小、修井作业费用高,多种压裂工艺受到限制,因此海上压裂施工必须在保证施工安全的前提下,减少修井作业次数,对压裂工艺方案进行优化,并结合原井管柱特点,针对管柱中受力危险部位进行重点分析,进行方案设计。本论文讨论海上一生产井,原井管柱中存在3个永久密封,压裂施工中需要利用原井永久密封进行压裂封隔施工,依据力学参数计算结果,优化管柱结构,保证压裂施工安全可靠,对海上多数油井压裂施工有很好的借鉴指导意义。

Because more deeper and complex structural wells develop in the offshore oilfield,much of fracture technology can't be used.so,fracturing job in offshore must be designed with considering working safety,and optimization on the base of the original string,especially considering the mechanics analysis.One well will be analysed in the offshore with three permanent packer.in this paper Thestring should isolate the zone with three permanent packers.And the design of the fracturing string should be based on the result of mechanics analysis to ensure the work safety,and it can also provide experiences for other offshore wells.