普光高含硫气田裸眼水平井投产工艺技术  

Techniques and technology of putting horizontal open holes into production in the Puguang Gas Field with high H_2S contents

作　　者：石俊生[1] 古小红[2] 王木乐[1] 余涛[1] 邹峰梅[1] 

机构地区：[1]中国石化中原油田分公司采油工程技术研究院 [2]中国石化中原油田普光分公司

出　　处：《天然气工业》2012年第1期71-74,124-125,共4页Natural Gas Industry

基　　金：中国石油化工股份有限公司天然气项目管理部先导性研究项目"普光气田高含硫裸眼水平井完井技术研究"(编号:G04CQ-10-ZS-0169)

摘　　要：川东北普光高含硫气田裸眼水平井投产,存在着碳酸盐岩地层易喷易漏、井控安全风险高,钻水泥塞容易开窗出轨,结构复杂的一体化分段酸化—生产完井管柱极易发生粘卡事件等难题。为此,在该气田大湾气藏采用井筒模拟通井处理工艺,优化设计完井管柱结构,结合二次下井回接完成、优质钻完井液与内防喷工具的使用,妥善解决了上述难题,实现了分段完井管柱多级封隔器适时坐封隔绝气层以及滑套顺序开关、均匀布酸的目标,取得了很好的应用效果。结论认为:①在该区实施裸眼水平井投产工艺以及钻塞、模拟通井处理工艺是可行的,是高酸性气田合理高效开发值得借鉴的一个模式;②井壁稳定、顺畅、润滑的井况环境是裸眼水平井安全顺利投产的前提条件,也是实现降本增效、安全开发酸性气田的重要技术手段;③针对高酸性裸眼气井完井投产工艺技术的复杂性须选择优质完井液,全过程、全方位、多层面的从技术角度进行安全控制是井控技术的发展方向;④碳酸盐岩气藏裸眼井投产作业全过程使用钻完井液压井,对于如何选择酸化、排液模式才能解除对储层造成二次污染仍需不断加以认识和完善。The open hole completion technology is commonly used in the Puguang sour gas field.However,there exist such problems as frequent blowouts and lost circulations in carbonate formations,a high risk in well control,casing window easily formed during the cement plug drilling,frequent sticking occurrence due to the complicated structure of the integrated acidizing-production completion string.In view of this,a wiper trip was simulated at the Dawan gas reservoir of this field,then the completion string was optimized;and in combination with tieback during the second trip and the use of optimum drilling/completion fluids and internal blowout tools,the above problems were solved.Additionally,more good results were achieved by multiple packers to isolate the gas zone,sliding sleeves for opening/closing to realize stage stimulation,and the acid to be uniformly distributed.To summarize,this paper presents the following conclusions.(1) It is feasible and reliable to perform technologies of open hole completion,and cement plug drilling,and wiper trip simulation in this study zone,which provides reference for highly efficient development of such sour gas fields.(2) The stable,smooth and lubricated wellbore is not only the precondition of horizontal open hole completion,but an important measure for cost reduction and safe development of a sour gas field.(3) As for the great complexity of the open hole completion technology used in sour gas wells,high-quality completion fluids should be used to realize safe well control during the whole process,on different aspects and different levels.(4) Blowouts or circulation losses easily occur during the development of carbonate reservoirs so that killing with drilling and completion fluids will have to be used during the whole completion process.Therefore,further studies on how to choose the proper acidizing method and flowback pattern are needed to relieve the secondary contamination to the reservoirs.

关 键 词：普光气田 高含硫 裸眼水平井 投产技术 模拟通井 完井管柱 优化 

分 类 号：TE377[石油与天然气工程—油气田开发工程]