东海超深大位移气井完井技术实践

东海P-1井利用老井侧钻开发边际油气藏,具有井深大、水平位移大、大斜度稳斜段长等特点。为解决大位移井完井作业中因井筒条件限制,净化清洁难度大、井筒摩阻大、射孔校深难度大,施工风险高、常规管柱结构设计难以满足操作安全可靠的要求等问题,通过对井筒清洁技术、高效润滑技术、射孔校深技术和管柱优化的研究,有效清洁超深大位移井井筒,降低井筒摩阻,解决射孔校深难题,实现气井管柱密封评价和封隔器安全坐封。现场应用表明,东海超深大位移井完井技术可行,实现了边际油气田的低成本开发。

Well Completion Technology Application on Ultra-deep Extended-reach Well in the East China Sea

Well P-1 in the East China Sea develops marginal oil and gas reservoirs with sidetrack drilling from the old well. It has the characteristics of ultra-deep, large horizontal displacement and long slope stability. In the process of well completion, the well bore has large friction and is difficult to clean up, difficulty of perforation correctionand high construction risk. The conventional tubing structure design is difficult to meet the requirements of safe and reliable operation. Therefore, through the research of wellbore cleaning technology, efficient lubrication technology, perforation depth correction technology and tubing structure optimization, it can effectively clean the well bore, reduce the friction resistance, solve the problem of perforation depth correction, and realize the seal evaluation of the gas well tubing structure. The field application shows that the ultra-deep and extended-reach well completion technology is feasible, and the low-cost development of marginal oil and gas fields is realized.