正压射孔完井中附加压力形成现象及数值求解  

Additional Pressure of Positive Pressure Perforating Completion and Its Numerical Solve

作　　者：范宜祥 蔡敏 王强[1] 王锦锦 秦春[2] 

机构地区：[1]中国石油吐哈油田分公司温米采油厂,哈密838202 [2]江苏石油勘探局钻井处,扬州225000

出　　处：《重庆科技学院学报（自然科学版）》2011年第3期110-112,115,共4页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

摘　　要：正压射孔完井中,在高能气体能量衰减过程中射孔液柱压力和地层流体在原有的正压差平衡下,会产生一个瞬间附加压力。模型计算表明,正压射孔完井中射孔液对孔道壁压力与地层压力重新达到平衡时存在时间滞后现象,通过设定参数计算表明瞬间地层流体压力传递滞后15.476ms,说明射孔液对孔道壁会产生较大附加压力也会造成压实效应。The positive pressure perforating completion, in fluid column pressure and formation fluid in the original is high energy gas energy attenuation process perforating differential pressure balance will generate a moment of additional pressure. The established model shows that there is time delay phenomenon in positive pressure perforating completion, when perforating fluid is rebalances with pore-wall pressure and formation pressure. Through setting parameters calculation shows that transmission lag of instant formation fluid pressure is 15.476 ms, and more additional pressure of perforating liquid on pore-wall shall cause compaction effect. It provides reference for further study the thickness of the compaction belt, the physical character parameters and water locking damage study of tight sandstone reservoir additional pressure.

关 键 词：正压射孔完井 致密砂岩 附加压力 时间滞后 压实效应 

分 类 号：TE257[石油与天然气工程—油气井工程]