### Abstract

This article presents a simplified mathematical model based on the energy-work method to estimate the penetration depth in well perforation. The model uses casing and formation properties in the estimation. It uses the initial speed of the bullet and the failure strengths of the materials resisting penetration as model input. An automated computer program was developed to compute the penetration depth in terms of various field parameters. It was found that bullet penetration increases with increasing jetting velocity and decreasing effective bullet surface area, and that the use of explosive-type HMX1 yields higher penetration depth for the same bore size. The results also showed that the productivity ratio becomes much higher for larger borehole diameters and higher explosive speeds. Overall, the study showed that the model can be used to design for optimum penetration depths leading to an optimum productivity ratio.

Original language | English |
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Pages (from-to) | 1786-1795 |

Number of pages | 10 |

Journal | Petroleum Science and Technology |

Volume | 26 |

Issue number | 15 |

DOIs | |

Publication status | Published - Oct 2008 |

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### Keywords

- Energy-method
- Explosive speed
- Penetration depth
- Perforation
- Productivity ratio

### ASJC Scopus subject areas

- Chemistry(all)
- Chemical Engineering(all)
- Fuel Technology
- Geotechnical Engineering and Engineering Geology
- Energy Engineering and Power Technology

### Cite this

*Petroleum Science and Technology*,

*26*(15), 1786-1795. https://doi.org/10.1080/10916460701677690