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首页> 外文会议>Technical papers for 2010 CNPC international wellbore technology seminar. >Drilling and Completion Technology Research of Blowout and Lost Circulation Co -existence in Sour Gas Well
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Drilling and Completion Technology Research of Blowout and Lost Circulation Co -existence in Sour Gas Well

机译：酸性气井井喷与漏失共存的钻完井技术研究

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The thief zones, which, are encountered in drilling sour gas wells in the gas fields of Sichuan and Chongqing, need to be temporarily blocked by spotting the special lost circulation material (LCM) or plugs to regain returns and kill the well or using suitable completing technology. Furthermore, corresponding emergency response plans un der the complex circumstances such as a combination of lost returns and the kick when there is neither pressure win dow for safe drilling nor suitable conditions for completing a well. The following considerations shall be taken: ( 1) The accurate position of lost zones and pay zones shall be confirmed through an analysis of the formation pressure and pressure bearing capacity of all zones when lost returns and the kick occurs at the long intervals of open hole where various pressure systems exist. The responding program shall be made to stop loss and kill the well. ( 2 ) The LCM with significant pertinence to the rock characteristics of lost zone shall be selected and used to seal off the lost zone during the drilling operation along with suitable stopping loss progress. ( 3 ) The borehole pressure shall be kept in balance all the time using top -up technology according to the combination of lost returns and the kick. (4) The permanent LMC with high compressive strength after being solidified may be chosen when mud loss does not occur in pay zones, otherwise temporary plugging material which can give the utmost protection to the pay zones shall be used when mud loss happens in pay zones and stopping loss is deemed necessary. (5 ) The options of ce menting and completing techniques must meet both the requirements of gas production technology and the need of safe operation under the complex down -hole problems such as a combination of lost returns and the kick in sour gas wells.
机译：在四川和重庆的气田钻探酸性气井时遇到的小偷地带，需要通过发现特殊的漏失材料（LCM）或塞子以重新获得收益并杀死该井或使用适当的完井技术来暂时阻塞。技术。此外，在复杂的情况下，例如既没有安全钻探的压力，也没有适当的完井条件的复杂情况下，相应的应急响应计划，例如，损失的回报和冲动的结合。应考虑以下因素：（1）当在长距离裸眼井眼中发生损失返还和反冲时，应通过分析所有区域的地层压力和承压能力来确定损失区和补偿区的准确位置。存在各种压力系统的地方。应制定响应程序以阻止损失并杀死井。 （2）应选择与失落带的岩石特征有重大关系的LCM，并在钻井过程中连同适当的停失进度来封闭失落带。 （3）应根据损失的收益和冲击力的结合，始终采用增补技术使井眼压力保持平衡。 （4）当产油区不发生泥浆流失时，可以选择凝固后具有较高抗压强度的永久性LMC，否则当产油区发生泥浆流失时，应使用能对产油区提供最大保护的临时堵漏材料。并且认为止损是必要的。 （5）固井技术和完井技术的选择必须既要满足天然气生产技术的要求，又要在复杂的井下问题（如损失的收益和含气井的井涌问题）下安全运行。

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