Acta Optica Sinica, Volume. 24, Issue 8, 1107(2004)
Vapor-to-Water Ratio Measurement in Steam Injection Oil Well by Refractive Index Method
During injecting high temperature and pressure steam into an oil well, it is important to economize energy and raise yield if the vapor-to-water ratio continuously from the mouth to the bottom of the oil well is known. Because the vapor and water have different refractive indexes, the vapor-to-water ratio can be deduced from the response characteristic of refractive index of two-phase flow. The developed device, which adopts sapphire as the probe, can respond to the change of vapor-to-water ratio directly, and can be used in small working space in the steam with high temperature and pressure. The response curve gained by the test in a boiler pipe is accordant with the real situation of vapor-water ratio of the steam transportation. The device also works in a steam injection oil well with depth of 800 m, temperature of 270 ℃ and pressure of 10 MPa at well mouth. The experimental result is helpful to analyze the information of steam injection well of oilfield.
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[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. Vapor-to-Water Ratio Measurement in Steam Injection Oil Well by Refractive Index Method[J]. Acta Optica Sinica, 2004, 24(8): 1107