Patent ID: 7640133
Filing Date: 2009-12-29
Classification: E21B,G01F,G01N

Abstract:
1. In an injector well having a wellhead at the earth's surface where a two phase fluid is supplied to the injector well for injection into a surrounding formation along a portion of the injector well, a method for determining at least one fluid property of the two phase fluid along the portion of the injector well, the method comprising: measuring temperatures and pressures of the two phase fluid at the wellhead; measuring the speed of sound in the two phase fluid at the wellhead using time-of-flight measurements of sonic pulses passing through the two phase fluid; measuring temperatures of the two phase fluid at a plurality of locations along the portion of the injector well; and determining at least one fluid property of the two phase fluid along the portion of the injector well from the temperatures, pressures, and speed of sound measured at the wellhead, and the temperatures measured at the plurality of locations along the portion of the injector well, wherein the at least one fluid property is selected from the group including