Journal
OPTICS AND LASER TECHNOLOGY
Volume 43, Issue 1, Pages 226-231Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2010.06.018
Keywords
Laser perforating; Specific energy; Saturation of rock
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Funding
- National Iranian South Oil Company
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Laser perforating in oil and gas wells is a new scientific approach to the generation of uniform holes at a selected pitch to increasing the permeability of rocks. The influence of laser irradiation time and rock saturation by water and heavy oil on the specific energy, the energy required to remove the unit weight of rock, used during Nd:YAG laser perforating. The results show that an increase in the laser irradiation time increases the depth of the rock hole as well as the specific energy used, with a nonlinear relationship Here, the estimated equation of rate of penetration as a function of the specific energy (SE) is free from saturation effects The type of saturation influences the specific energy, the amount of SE required for water saturated samples is more than that required for the heavy oil saturated samples, and heavy oil saturated samples needed more SE than the dry samples. (C) 2010 Elsevier Ltd. All rights reserved
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