动态负压射孔形成的射孔孔道内涌流机理研究  

Study on the mechanism of surge flow in perforation channel genetrated by dynamic underbalance perforating

作　　者：咸玉席[1] 方正 邵振鹏 卢德唐[1] 毕全福 XIAN Yuxi;FANG Zheng;SHAO Zhenpeng;LU Detang;BI Quanfu(Oil and Gas Research Center,University of Science and Technology of China,Hefei,Anhui 230027,China;Well Testing Branch of CNPC Bohai Drilling Engineering Co.,Ltd.,Langfang,Hebei 065007,China;Western Drilling Engineering Company Test Oil Company,CNPC,Karamay,Xinjiang 834000,China)

机构地区：[1]中国科学技术大学石油天然气研究中心,安徽合肥230027 [2]中国石油集团渤海钻探工程有限公司油气井测试分公司,河北廊坊065007 [3]中国石油集团西部钻探工程公司试油公司,新疆克拉玛依834000

出　　处：《油气井测试》2020年第1期1-6,共6页Well Testing

基　　金：国家重大科技专项“致密油气藏多尺度介质复杂结构井数值试井分析方法及应用研究”(2017ZX05009005-002)

摘　　要：动态负压射孔可完全清理射孔孔道内压实带,但对清理的射孔孔道内压实带岩屑的介质难以有正确认识。对安装与未安装封隔器的动态负压射孔进行现场测试,分别得到动态压力曲线,研究二者动态负压变化特征。结果表明,安装封隔器的动态负压射孔中,动态压力负压值持续时间长,金属射流侵彻油气储层形成的孔眼中,其介质是金属射流侵入岩石产生的高压气体;射孔孔道内携带碎屑及压实带岩屑进入到井筒中的涌流发生在井筒压力下降阶段。该研究可优化动态压力最小值,避免因动态压力差大导致井筒损坏。Dynamic underbalance perforating can completely clean the compaction zone in the perforating tunnel,but it is difficult to correctly understand the medium for cleaning the compacted devris in perforation tunel.The dynamic negative pressure with and without the packer were tested in the field and the dynamic pressure curves were obtained respectively to study the dynamic underbalance presssure changges.The results show that the dynamic pressure values lasts for longer time in the dynamic underbalance perfotaing with a packer.The medium can be inferred to be as the high pressure gas genetrated by the metal jet penettrating the rock of the oil and gas reservoir.the surge flow that carries debris and compacted deberis into the wellbore occurs during the wellbore pressure drop phase.This study can be used to optimize the dynamic pressure minimum to aviod the wellbore damge under the high pressure difference.

关 键 词：动态负压射孔 封隔器 涌流介质 射孔枪 射孔孔道 高压气体 冲击波 动态压力 

分 类 号：TE353[石油与天然气工程—油气田开发工程]