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All Journal Formosa Journal of Applied Sciences (FJAS) PRESUNIVE CIVIL ENGINEERING JOURNAL
Anggoro Wisaksono
President University
Arts Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Education Engineering Social Sciences

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Novel Direct Downhole Enthalpy Estimation at Geothermal Well in Cubadak, West Sumatra, Indonesia Anggoro Wisaksono
Formosa Journal of Applied Sciences Vol. 1 No. 3 (2022): August 2022
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/fjas.v1i3.882

Abstract

Temperature, pressure and enthalpy data are very important and valuable, both during geothermal drilling and in well operation. Fibre optic distributed temperature sensors (DTS) that offer flexible and robust solutions for geothermal applications and temperature logging, an established method for well temperature measurement. All temperature measurement methods will be combined with reservoir enthalpy estimation using T-p-x state space correlation for H2O-NaCl geothermal brine. A geothermal brine enthalpy estimation model has been developed, based on T-p-x state space correlation using C programming language. This was able to provide estimations of pressure, mass fraction, density and enthalpy, solely based on measured temperature limited to below 300oC. The model can be applied to various geothermal fields with sodium chloride dominated waters. The study treated the mixture of geothermal brine and drilling fluid heated in the well for certain periods as a simulation of geothermal brine at the reservoir. The enthalpy monitoring graph proved useful for monitoring the enthalpy in the reservoir. The results from the model are used for early electrical power estimations of the Cubadak geothermal working area site, based on current geothermal gradient extrapolation of CBD-1 well.
Evaluation on Merauke Drainage System in Overcoming Flood-Prone Areas Bagoes Rezky Ramdhani; Maryo Inri Pratama; Anggoro Wisaksono
PRESUNIVE CIVIL ENGINEERING JOURNAL Vol. 1 No. 1 (2023)
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/pcej.v1i1.4244

Abstract

Merauke city suffers flooding in almost every rainy season, which endangers the environment and disturbspeople's activities. One of the worst floods happened in 2019, where flooding damaged vegetables and crops, impactedthe city's economy, and later caused economic inflation. Therefore, a study evaluating the drainage system in Meraukecity is needed to overcome this issue. This study was conducted through a field survey and literature study with datathat varies from hydrological, elevation, and hydraulics data. Hydrological data includes yearly rainfall data, andhydraulics data consists of the drainage network and designs. This evaluation will then result in the normalization of adrainage system. This study found that the capacity of the current drainage system is 10.815 m3/s, where this drainagecapacity cannot accommodate the amount of flood discharge plan. Also, the existing drainage system is missing acomponent that was not built in the first place, affecting the drainage's capacity. Therefore, a normalization of thedrainage system is needed to avoid flooding.
Co-Authors Bagoes Rezky Ramdhani Pratama, Maryo Inri