摘要
为了降低深水钻井作业风险、缩短钻井周期,提出了深水钻井表层导管静置时间窗口设计方法,并通过现场应用对其进行了验证。根据现场试验数据得出了表层导管与周围海底土间摩擦力随静置时间的变化关系,并建立了表层导管实时承载力计算模型。针对表层导管喷射到位至解脱送入工具阶段和二开套管坐挂井口固井阶段这两个相对危险的阶段对表层导管进行了力学分析,并以南中国海某深水井表层导管为例确定了喷射到位至解脱送入工具阶段和二开套管固井阶段的表层导管静置时间。现场应用结果表明:运用提出的表层导管静置时间窗口设计方法既能保证作业安全又能缩短作业时间,表层导管喷射到位至解脱送入工具阶段平均每口井节约作业时间超过12 h,二开套管固井阶段平均每口井节约作业时间超过24 h。
To decrease the risk in deep water drilling and shorten the drilling period, a structure casing soaking time design method for deep-water jetting was provided and verified by oil field application. Based on the field simulatioz~ experiment of soil-pile interaction, the relationship between soaking time and bearing capacity was achieved, and a real-time beating capacity calculation model of structure casing was established. The mechanical properties of structure casing in two conditions were analyzed, including Cam Activated Drilling Ahead （CADA） tool releasing stage and surface casing cementing stage, and the soaking time windows of the two stages were designed. Field application results show that： This method can ensure the safety in deep water drilling, optimize driving depth of structure casing, and also improve the drilling efficiency. More than 12 hours per well on average in CADA tool releasing stage and 24 hours per well on average in surface casing cementing stage were saved.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2014年第2期234-238,共5页
Petroleum Exploration and Development
基金
国家自然科学基金项目"深水钻井表层导管喷射钻进机理研究"(51274215)
国家科技重大专项"深水钻完井及其救援井应用技术研究"(2011ZX05026-001-04-20120523)
关键词
深水钻井
表层导管
喷射法
静置时间
导管承载力
deepwater drilling
structure casing
jetting
soaking time
bearing capacity
