Rock Phase Control by Using High Power Laser for Production Enhancements

摘要

This study is part of a more extensive research effort by Gas Technology Institute to apply high power laser technology in well construction and completion techniques for the oil and gas industry. It has been demonstrated that by altering laser parameters, including power and duration, changes in rock properties and phase behavior can be controlled. This paper presents the results and analysis of high power laser interactions, including the Midinfrared Advanced Chemical Laser (MIRACL), Chemical Oxygen Iodine Laser (COIL) and carbon dioxide lasers in limestone, sandstone and shale samples. When laser energy was allowed to melt minerals within the rock matrix, an impermeable barrier with ceramic-like characteristics was created that may provide in-situ fluid flow control and wellbore stability. A porous ceramic barrier could also be created on demand through the application of a high velocity purging system for applications in unconsolidated rock formations, preventing sand production and tunnel collapse, critical concerns in well completion and production operations.