| 水力喷砂射孔与起裂大型物理模拟试验 |
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| 引用本文： | 胡强法,朱峰,李宪文,付钢旦,赵文,吕维平.水力喷砂射孔与起裂大型物理模拟试验[J].中国石油大学学报(自然科学版),2011(6):81-87. |
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| 作者姓名： | 胡强法 朱峰 李宪文 付钢旦 赵文 吕维平 |
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| 作者单位： | 中国石油大学机械与储运工程学院;中国石油集团钻井工程技术研究院江汉机械研究所;长庆油田分公司油气工艺研究院; |
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| 摘 要： | 采用油田现场使用的施工参数、喷射工具和施工设备,用与长庆油田长6地层对应的露头岩样制作靶件,模拟水力喷砂射孔与起裂的过程,进行大型物理模拟试验,并用专用工具解剖试验靶件。结果表明:喷砂射孔的完整孔形呈泪滴形,分为套管穿孔段、入口反溅段、水泥环缩径段和主体段4部分;起裂后的孔道末端还有一狭长的剑形通道;试验条件下,射流速度超过一定限度后会导致靶件起裂,表明射流速度提高可使孔内局部增压显著;起裂后射流顺裂缝方向冲刷形成剑形通道,使喷砂射孔通道成倍增长,有利于改善穿透效果;多个喷嘴射出的孔道保持各自独立的孔形,起裂后的裂缝可连通各个孔道,在试验条件下多个射流通道共同作用可引导近井地带裂缝的形成与扩展。
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| 关 键 词： | 射流 水力喷砂射孔 起裂 模拟试验 孔道形状 |
Physical simulating experiments of hydrajet perforating and fracture initiation process |
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| Institution: | HU Qiang-fa1,2,ZHU Feng2,LI Xian-wen3,FU Gang-dan3,ZHAO Wen3,L Wei-ping2 (1.Faculty of Mechanical and Oil-Gas Storage and Transportation Engineering in China University of Petroleum,Beijing 102249,China; 2.Jianghan Machinery Research Institute,Drilling Research Institute,CNPC,Jingzhou 434000,China; 3.Oil & Gas Technology Research Institute,Changqing Oilfield Company,Xian 710021,China) |
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| Abstract: | Experimental researches were introduced by selected samples from Chang 6 formation of Changqing Oilfield,and the process of hydrajet perforating and fracture initiation process was simulated by using field parameters,jetting tools and equipments.The tested samples were all cut by special tools.The experimental results show that the whole jetting hole is of tear-drop shape,and it includes four parts of casing perforation,entrance sputtering section,cement reduction and main section.When fracture initiated,a ... |
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| Keywords: | jets hydrajet perforating fracture initiation simulating experiment cavity shape |
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