Study on geochemistry of sea water intrusion effect in Jailolo geothermal system

Abstract

The possibility of seawater intrusion in geothermal systems is very likely to occur. This is caused by several locations of geothermal systems which are very close to the coast. This paper presents a geochemical analysis of the data manifestations of water and gas, to determine the effect of sea water on the Jailolo geothermal system. From the results of the water analysis, it is clear that the effect of sea water intrusion on the Jailolo geothermal system is shown in the anions and cations diagrams, which is almost all of the plots very close to the seawater points. So that the next analysis is focused on the position of mixing sea water with reservoir water and correction of the parameters that are affected by the mixing of sea water. It is intended that the resulting geochemical model can describe the actual reservoir conditions. If we did not include the correction factor to the calculation this will lead into mislead assessment of the reservoir temperature of geochemistry model which is the final result of the study/assessment. It is also necessary take into account for the next step of the process which is exploitation phase.

Geochemical Approach for Seawater Intrusion Assessment in the Area around Yogyakarta International Airport, Indonesia

“…Therefore, studies relating to the interpretation of groundwater geochemical characteristics, the geochemical processes involved, and their evolution in natural water circulation processes not only contribute to the efficient use and conservation of this important resource but also help to envisage improvements in the environment of the groundwater (Ravikumar and Somashekar, 2017). A geochemical approach for seawater intrusion assessment has been conducted by some researchers during last decade (Han et al, 2011;Rao et al, 2011;Agoubi et al, 2013;Garing et al, 2013;Kura et al, 2014;Nair et al, 2015;Eissa et al, 2016;Isawi et al, 2016;Liu et al, 2016;Supriyadi et al, 2017;Kanagaraj et al, 2018;Naseem et al, 2018;Shi et al, 2018;Bahera et al, 2019;Fortuna et al, 2020;Seddique at al. 2019;Dhakate et al, 2020;Sae et al, 2020;Satheeskumar et al, 2020;Telahigue et al, 2020;Wang et al, 2020).…”