中国石油大学学报（自然科学版）2016，Vol.40Issue(5)：118-122,5.DOI:10.3969/j.issn.1673-5005.2016.05.014
脉冲冲击波有效作用距离影响因素模拟分析
Numerical simulation study on parameters impacting effective influence distance of pulse shock waves for well stimulation
摘要
Abstract
Numerical simulation was conducted to analyze the influence of energy storage, operation frequency, elastic modu-lus, and stress in rocks on effective repeated pulse shock waves for well stimulation. The simulation results show that, in the case with low energy storage, only plug removal can be achieved with no reservoir fracturing, while in the case with high en-ergy storage, micro fractures can be generated that can induce reservoir fracturing and increase the formation permeability. With the increase of the number of operations, the effective influence distance of the shock wave can be increased continuous-ly to a maximum value. After that, it remains constant. The rock stress has a great effect on the performance of the shock wave. With the increase of the rock stress, the effective distance of the shock wave decreases logarithmically, and when the rock stress is low and the elastic modulus is high, the effective distance increases as the number of operations increases. When the rock stress is high, the operation frequency and elastic modulus have little effect on the effective distance. The re-peated strong shock wave can enhance plugging removal and increase production or injection of wells for the reservoir with large elastic modulus and low rock stress. In practical applications, the operation frequency can be optimized based on spe-cific reservoir conditions.关键词
脉冲冲击波/岩石应力/有效作用距离/解堵/数值模拟Key words
pulse shock wave/rock stress/effective influence distance/plug removal/numerical simulation分类
能源科技引用本文复制引用
隋义勇,张永民,李加强,曲永春,任桂山..脉冲冲击波有效作用距离影响因素模拟分析[J].中国石油大学学报（自然科学版）,2016,40(5):118-122,5.基金项目
国家自然科学基金项目(51574271) （51574271）
中央高校基本科研业务费专项(15CX02007A) （15CX02007A）
