摘要
海上油田浅层气窜使表层套管与隔水导管环空带压,不仅严重威胁海上石油平台作业安全,还可能造成海洋环境污染、缩短油气井寿命。为了准确预测海上油田浅层气窜风险,有效解决浅层气井环空带压问题,在分析研究海上油田浅层气窜特征及产生原因的基础上,建立了水泥环自收缩对完整性影响的分析模型,形成了浅层气窜风险预测新方法。采用此方法对XX油田E 8井浅层气窜风险预测分析的结果与施工结果一致。该方法可有效考虑体积收缩对水泥环完整性损害的影响,预测浅层气窜风险,为固井水泥浆性能优化设计、避免浅层气窜提供了依据。
The shallow gas channeling in offshore oil field causes the annulus pressure of surface casing and riser,which not only seriously threatens the safety of offshore oil platform operation,but also may cause marine environmental pollution and shorten the life of oil and gas wells.In order to accurately predict the risk of shallow gas channeling in offshore oil fields and effectively solve the issue of annulus pressure in shallow gas wells,an analysis model of the impact of cement sheath shrinkage on the integrity is established based on the analysis of the characteristics and causes of shallow gas channeling in offshore oil fields.A new method of shallow gas channeling risk prediction is formed.This method is used to predict and analyze the risk of shallow gas channeling in well E 8 of XX oilfield,and the results are consistent with the construction results.This method can effectively consider the effect of volume shrinkage on the integrity of cement sheath,predict the risk of shallow gas channeling,and provide a basis for the optimization design of cement slurry performance and the avoidance of shallow gas channeling.This method has broad application prospects for Bohai Oilfield shallow gas cementing.
作者
李进
常培敏
张启龙
刘鹏
刘海龙
郭明龙
曾旭洋
Li Jin;Chang Peimin;Zhang Qilong;Liu Peng;Liu Hailong;Guo Minglong;Zeng Xuyang(Tianjin Branch of CNOOC Ltd.,Tianjin,300459,China;State Key Laboratory of Offshore Oil Exploitation,Tianjin,300459,China;PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan,610051,China;Engineering Technology Company of CNOOC Energy Technology&Services Limited,Tianjin,300459,China)
出处
《天然气与石油》
2020年第2期68-73,99,共7页
Natural Gas and Oil
基金
国家“十三五”重大科技专项“渤海油田高效钻完井及配套技术示范工程”(2016 ZX 05058002)。
关键词
环空气窜
水泥环完整性
浅层气
固井
渤海油田
Gas migration
Cement sheath integrity
Shallow gas
Cementing
Bohai oilfield
