| Title | Fluid Flow Simulation from Wellpad to Separator to Recognize Changes of Steam Fractions in X Field |
|---|---|
| Authors | Akhmad SOFYAN, Bambang Yudho SURANTA, Margrit KARATEM, Hari Sumantri AKA, Joshua Mesak Mahok KILIKILY |
| Year | 2020 |
| Conference | World Geothermal Congress |
| Keywords | steam, brine, pipe, pressure, fraction, production, simulation, aspen hysys |
| Abstract | Field 'X' is a geothermal field that produces two-phase fluids, namely steam and brine. The geothermal fluid produced from the well will be flowed using a pipe to the separator to separate the phases between steam and brine. The amount of steam produced is affected by the fraction of steam. The larger the fraction of steam, the production of steam produced is greater and vice versa. When the fluid travels in the separator, a phase change occurs due to pressure drop and heat loss large enough thus causing steam to condense and turn into brine. This lowers the vapor fraction. To determine the fraction of steam and brine produced after passing through the pipe, geothermal field 'X' usually uses a flow meter data. Therefore, it is necessary to simulate fluid flow from the well to the separator using the software Aspen Hysys to find out the phase changes that occur in order to know the vapor fraction automatically without having to calculate based on flow meter data. In the field well 'X' geothermal fluid is flowed from pipe A to pipe B with a pipe length of 87.7 m, an inner diameter of 0.9017 m and an outer diameter of 0.9144 m. With the pipeline data, created a Process Flow Diagram (PFD) in the Aspen Hysys Software to simulate the process. The simulation results show that the amount of steam produced is 438.92 kg/s, while the amount of brine produced is 62.74 kg/s. To determine the feasibility of using this PFD simulation in the field, it is necessary to compare the results of the simulation Aspen Hysys with actual data and the results of manual calculations. Manual calculation data using the Darcy-Weisbach method with the calculation of the amount of steam produced is 440.85 kg/s, the amount of brine produced is 61.79 kg/s. The results of the percentage error in the fraction steam from the results of Aspen Hysys software are below 10%, namely 0.5% for steam and 0.24% for brine. While the comparison between the simulation Aspen Hysys with manual calculations, the value is error below 10%, namely 0.4% for steam and 1.5% for brine. The PFD simulation carried out is declared valid and can become a recommendation to the company to facilitate monitoring of steam production, production brine routine, and steam fraction. |