| Abstract |
Research on geothermal wells in Field "X", namely Well-A, Well-B, and Well-C have different steam and brine production. Therefore, an accurate measurement is needed in calculating the flow rate to determine the behavior of production wells. The use of a flow meter using the Tracer Flow Test (TFT) method can be the first step to measure the flow rate of production wells. However, the calculations that should be used to calculate the flow rate in these wells cannot be determined accurately. In measurements using a flow meter, the output from the production well is in the form of different pressure which is used to calculate the flow rate using several equations, including the Murdock equation and the Mubarok equation. To determine the feasibility of using these two equations, it is necessary to compare the actual data using TFT. Sequential steam data obtained in Field “X†in Well-A, Well-B, and Well-C through the Murdock equation, namely, 37.1 kg/s, 10 kg/s, and 6.8 kg/s, while the brine data is 0.009 kg/s, 7.6 kg/s, and 7.4 kg/s. Steam data in the same well using the Mubarok equation are 27.4 kg/s, 7.8 kg/s, and 5.1 kg/s, while the brine data is shown at 0.007 kg/s, 1.6 kg/s, and 5.5 kg/s. The actual steam data from TFT, respectively, from Well-A, Well-B, and Well-C obtained from the field results are 32 kg/s, 10.9 kg/s, and 7.5 kg/s. Meanwhile, the brine data obtained from TFT were 0 kg/s, 7.8 kg/s, and 7.3 kg/s, respectively. The result of the percentage error with the Murdock equation compared to the actual TFT data obtained results of 16% steam and 0% brine in Well-A, 8% steam and 2% brine in Well-B, 9% steam and 2% brine in Well-C using the Murdock equation. While the error in the Mubarok equation results in 15% steam and 0% brine in Well-A, 28% steam and 2% brine in Well-B, and 58% steam and 26% brine in Well-C. From the comparison results of the Murdock and Mubarok equations, it can be concluded that the equation that can be applied to the Field "X" is Murdock's equation because it has a smaller error value. However, Murdock's equation is still ineffective for use in the Field “X†because there is an error value of greater than 10% in the steam value of well A which is a single-phase well. If this equation is to be used, it must be applied to wells producing two-phase fluid. |