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中文摘要：
为了对南海流花油田现有水力设备能力进行评价，规避钻井风险，依据建立的大位移井水力延伸极限模型，对南海流花超大位移井的水力延伸极限进行了分析，研究表明地层安全密度窗口和最大允许总压耗是大位移井水力延伸极限的客观制约因素。在现有设备条件下，南海流花超大位移井水力延伸极限主要受稳斜段的泵压限制，稳斜段的水力延伸极限长度为6500-7200m；如果对现有设备进行升级改造，则其水力延伸极限主要由水平段的地层因素决定，全井水力延伸极限为8000-9800m。对水力延伸极限的分析也可以作为井身结构设计的一个重要参考。
英文摘要：
In order to evaluate the capacity of existing hydraulic equipments and avoid drilling risks, the hydraulic extended limit of mega-extended-reach well at Liuhua field in South China Sea is analyzed based on the established model. The study shows that the safe mud density window and the maximum allowable total pressure loss are the main two objective constraints. Under the conditions of the existing equipments, the hydraulic extended limit of mega-extended-reach well at Liuhua Field in South China Sea is determined mainly by the pump pressure limit when drilling the angle holding segment, of which the extended limit is from 6500 to 7200 m. If upgrading existing equipments, its hydraulic limit is affected mainly by the factors of formation outside horizontal section and the total extended limit is 8000 to 9800 m. The analysis of the hydraulic limit can be also used as an important reference of well structure design.
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