石油钻采工艺2017，Vol.39Issue(3)：293-297,302,6.DOI:10.13639/j.odpt.2017.03.007
水力喷砂定点射孔力学机理
Mechanical mechanism of hydraulic sand jet oriented perforation
仝少凯 1王祖文 1杨小平 2王伟 3岳艳芳 2骆裕明4
作者信息
- 1. 中国石油川庆钻探工程有限公司长庆井下技术作业公司
- 2. 中国石油华北油田公司采油工程研究院
- 3. 中国石油华北石化公司机动设备处
- 4. 中国石油华北油田公司山西煤层气勘探开发分公司
- 折叠
摘要
Abstract
At present, the construction and design accuracy of hydraulic sand jet perforation is lower. To solve this problem, a prac-tical and reliable method for hydraulic jet mechanic parameter design was searched for to study mechanic mechanisms of hydraulic jet on reservoir rock. According to the principle of conservation of energy and the impulse theorem, the energy equation for the process of hydraulic sand jet oriented perforation through casing, cement sheath and formation system was established, and the model for calculat-ing key mechanical parameters (e.g. critical impact force, critical impact velocity and perforation time) in each stage of jet oriented per-foration through casing, cement sheath and formation system were derived. And accordingly, the mechanical analysis chart of hydraulic sand jet oriented perforation was plotted. It is indicated that as for hydraulic sand jet oriented perforation through casing, cement sheath and formation, the required energy is increased significantly and correspondingly perforation time extends, but impact force and impact velocity decrease with maximum amplitude of 5.7% and 8%, respectively. It is revealed that the mechanical chart of hydraulic sand jet oriented perforation established in this paper can well reflect the process of hydraulic sand jet oriented perforation and its application result is good with perforation time error of 6.8%. It provides a new mechanical model and theoretical basis for the mechanical parameter design and optimization of hydraulic sand jet oriented perforation and the fracture initiation criterion of hydraulic fracturing.关键词
水力喷砂/射孔/套管/水泥环/力学模型/能量守恒Key words
hydraulic sand jet/perforation/casing/cement sheath/mechanical model/conservation of energy分类
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仝少凯,王祖文,杨小平,王伟,岳艳芳,骆裕明..水力喷砂定点射孔力学机理[J].石油钻采工艺,2017,39(3):293-297,302,6.
