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Abstract
This article presents the experiment process and results of abrasive water jet perforation. This experiment was conducted in Kalamayi, China, Xinjiang Oilfield in October 2004. Referring to explosive perforation experiment, we made two cement cylinder samples with a diameter of 2.4 m, 1.2 m high, putting a 139.7 mm (5-1/2″) and a 177.8 mm (7″) casing sub in them, respectively. The two cylinders were buried underground. During the experiment, we changed the following parameters: blasting time, nozzle diameter, and cement cylinder property. After experiment, we opened the cylinder and found that, compared with explosive perforation, the hole on the casing wall and the tunnel in the cement were much rounder and bigger than with that method. In addition, it can cause a fracturing effect, possibly forming micro-fractures on the tunnel wall. This effect can avoid forming impermeable crushed zone when using explosive perforating.
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ACKNOWLEDGMENTS
This project was supported by the National Natural Science Foundation of China (50774089) and the Hi-Tech Research and Development Program of China (2007AA09Z315). The authors would also like to express their thanks to the staff of Xinjiang Oilfield Company, Ltd. for their assistance in preparing samples and in the experiments.