群桩作用下钻井隔水导管入泥深度计算方法研究
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摘要
减小井距可节约工程费用,但会引起群桩效应而导致拒锤现象发生。通过室内模拟试验和渤海现场模拟试验,分析了群桩效应对隔水导管周围土体力学性质的影响,提出了群桩作用下钻井隔水导管入泥深度的计算方法,并研制出相应的计算软件。该计算方法已在我国海上10多个油(气)田进行了应用,取得了非常好的效果。群桩作用下钻井隔水导管入泥深度计算方法在提高海上作业速度、保证海上作业安全和降低油田勘探开发成本方面有着重要意义。
Reducing well spacing can economize project cost, but it will cause group pile effect and bring on the phenomenon of repelling hammering. Through the indoor modeling test and on-site modeling test in Bohai Bay, the paper analyses the effect of group pile to mechanical characteristics of the soil around the riser, provides driving depth calculation method for drilling riser under group pile interaction and has developed software for calculation. The calculation method has been applied in more than ten oil and gas fields, offshore China, and it gets very good effect. The method is important to advance offshore operation speed, ensure safe and reduce oil field exploration and development cost.
Reducing well spacing can economize project cost, but it will cause group pile effect and bring on the phenomenon of repelling hammering. Through the indoor modeling test and on-site modeling test in Bohai Bay, the paper analyses the effect of group pile to mechanical characteristics of the soil around the riser, provides driving depth calculation method for drilling riser under group pile interaction and has developed software for calculation. The calculation method has been applied in more than ten oil and gas fields, offshore China, and it gets very good effect. The method is important to advance offshore operation speed, ensure safe and reduce oil field exploration and development cost.
引文
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[7]佘师和,季耀东.浅桩坐底式海洋平台结构与桩基共同工作地震响应[C].中国土木工程学会计算机应用学会第三届学术讨论会,1987.
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[9]穆保岗.开口钢管桩的沉桩预测分析研究[D].南京:东南大学,1998.
[2]KARLSRUD K,NADI M F.Axial capacity of offshore piles in clay[C].22nd Ann SPE OTC6254,1990:405-416.
[3]GOLIGHTLY C R,NAUROY J F.End bearing capacity of piles in calcareous sands[C].22nd Ann SPE OTC6239,1990:345-356.
[4]LI Huagui.Equation si mplify dynamic analysis of deepwater drilling riser[J].Oil&Gas J.,1993,12(13):40-45.
[5]邢延.自升式钻井船桩腿插入深度计算分析[J].海洋石油,1985,(2).
[6]樊良本,朱国元.桩周土应力状态的圆柱孔扩张理论试验研究[J].浙江大学学报,1998,32(2):228-235.
[7]佘师和,季耀东.浅桩坐底式海洋平台结构与桩基共同工作地震响应[C].中国土木工程学会计算机应用学会第三届学术讨论会,1987.
[8]许清侠.沉桩的挤土效应对周边环境的影响[D].上海:同济大学,1998.
[9]穆保岗.开口钢管桩的沉桩预测分析研究[D].南京:东南大学,1998.
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