水力喷砂定点射孔力学机理

发布时间：2018-04-10 04:39

本文选题：水力喷砂　切入点：射孔　出处：《石油钻采工艺》2017年03期

【摘要】：为了解决目前水力喷砂射孔施工设计准确率较低的问题,寻找实用可靠的水力喷射力学参数设计方法,进行了水力喷射与储层岩石力学作用的机理研究。根据能量守恒原理和冲量定理,建立了水力喷砂定点射穿套管、水泥环及地层系统能量方程,推导了水力喷砂定点射穿套管、水泥环及地层各阶段临界冲击力、临界冲击速度和射孔时间等关键力学参数计算模型,据此建立了水力喷砂定点射孔工艺力学分析图版。研究结果表明,水力喷砂定点射穿套管、水泥环及地层所需能量大幅度增加,射孔时间随之增大,但冲击力和冲击速度却相应降低,降低幅度比最大值分别为5.7%和8%。分析认为,建立的水力喷砂定点射孔工艺力学图版能较好地反映水力喷砂定点射孔过程,射孔时间误差为6.8%,为水力喷砂定点射孔力学参数设计与优化、水力压裂起裂基准提供了新的力学模型和理论依据。
[Abstract]:In order to solve the problem of low accuracy of hydraulic sand blasting perforation design at present, a practical and reliable design method of hydraulic jet mechanics parameters is found, and the mechanism of hydraulic jet and reservoir rock mechanics is studied.According to the energy conservation principle and impulse theorem, the energy equations of hydraulic sand blasting fixed point projecting casing, cement ring and formation system are established, and the critical impact force of hydraulic sand blasting fixed point projecting casing, cement ring and formation stage is deduced.Based on the calculation model of critical mechanical parameters such as critical impact velocity and perforation time, the mechanical analysis chart of hydraulic sand blasting fixed point perforation process is established.The results show that the energy required for cement ring and formation increases greatly, but the impact force and impact velocity decrease correspondingly, and the maximum ratio of reduction is 5.7% and 8%, respectively.The analysis shows that the mechanical chart of hydraulic sand blasting fixed point perforation process can well reflect the process of hydraulic sand blasting fixed point perforation, and the perforation time error is 6.8, which is the design and optimization of mechanical parameters for hydraulic sand blasting fixed point perforation.Hydraulic fracturing fracture initiation standard provides a new mechanical model and theoretical basis.
【作者单位】：中国石油川庆钻探工程有限公司长庆井下技术作业公司;中国石油华北油田公司采油工程研究院;中国石油华北石化公司机动设备处;中国石油华北油田公司山西煤层气勘探开发分公司;
【分类号】：TE257.1

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