The relationship between Indonesian coal qualities and their geologic histories

Zamroni, Akhmad; Sugarbo, Oky; Prastowo, Rizqi; Widiatmoko, Fajar Rizki; Safii, Yandi; Wijaya, R. Andy Erwin

doi:10.1063/5.0006836

Cited by 13 publications

(6 citation statements)

References 12 publications

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“…In addition, one of the deciding factors for lithological features is geologic history. The key to understanding past rock stories is their geologic history (Zamroni et al, 2020). CaHCO3 facies and CaNaHCO3 facies are the groundwater facies in the study area.…”

Section: Resultsmentioning

confidence: 99%

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

Zamroni

2021

IGJ

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A total of 10 groundwater samples were obtained from groundwater wells with depths of around 8-10 meters distributed around Yogyakarta International Airport, Indonesia to test the geochemical of groundwater for assessing the seawater intrusion. Samples were taken into polyethylene bottles with a volume of 1000 ml. These bottles were rinsed to reduce the risk of any contamination prior to their filing with sampled water. Piper Diagram is used to evaluate seawater intrusion by plotting the percentages of cations and anions (in mEq/L) as a single point on the triangle. The groundwater facies' in the study area are CaHCO3 and CaNaHCO3. It suggests that the origins of the elements Ca and Na were estimated to derive from the dissolution of the plagioclase, hornblende, and pyroxene minerals found in the sand sediment, while the elements of HCO3 were estimated from the dissolution of carbonate minerals or the decomposition of organic matter and root respiration in the soil zone may enrich their concentration. The wells affected by slightly freshening were ZAM-04, ZAM-05, ZAM-06, ZAM-08, and ZAM-10. While the wells that are not affected by the intrusion or fresh were ZAM-01, ZAM-03, ZAM-07, and ZAM-09. However, ZAM-02 well which is close to the coastline and the closest to the airport development area was the only well that affected significantly by freshening, comparing with other wells. Another expected controlling factor was the fault in the northern part which continuously leads that location. By supported a flow pattern or large river, it was concluded the alluvial deposits buried the fault, and it was estimated to continue to that location.

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Section: Resultsmentioning

confidence: 99%

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

Zamroni

2021

IGJ

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“…Geological conditions define tectonic activities, basin settings, and the sequence of rocks or stratigraphic (Suprapto et al, 2017). Current morphological and rock conditions around the river can describe the river's past conditions, such as the rocks that formed it or lithology, the geological structure, and the current erosion and sedimentation processes (Zamroni et al, 2020). Drainage patterns in rivers are influenced by underlying rock lithology and structural control, while the slope of the channel is caused by the geological nature of the basin and the process of sedimentation and erosion.…”

Section: Factors Controlling River Morphological Changesmentioning

confidence: 99%

Anthropogenic influences on morphological changes in the Progo River, Daerah Istimewa Yogyakarta Province, Indonesia

Zamroni

Putra

Prasetya

2020

SJES

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Changes in the river morphology require knowledge of the suite of drivers that control it, whether natural or human. The study aims to analyze the anthropogenic influences on morphological changes in the Progo River using Google Earth Images. It is essential to know the recent changes in the morphology of the Progo River so that stakeholders can make policies to control human activities that influence the morphology changes of the Progo River. The study area is located in Bantul Regency, Daerah Istimewa Yogyakarta Province, Java Island, Indonesia. The size of the Progo River watershed is around 17,432 square kilometers. Google Earth Images analysis is carried out to analyze the morphological changes of the Progo River from 2012 to 2019. The result shows that land-use changes due to dam construction affected the sediment supply downstream of the dam. In addition, land-use changes around the Progo River due to the opening of agricultural land and settlement areas had an effect on decreasing the infiltration area, so that the number of trees holding the soil from erosion was reduced, producing more eroded sediment that flowed to the river. Sand mining in the river could cause the deepening of water depths and a decrease in the average height of the riverbed.

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“…The offshore bedrock structural patterns formed include the Sunda Asri Basin, the Thousand Platforms, the Arjuna Basin, the Vera Basin, the Eastern Shelf, the Billiton Basin, the Karimunjawa Arc, and Bawean. The sea-level changes produce the heterogeneity of the sediment quality [14]. Some evidence suggests a combination of symmetrical curves and fault structures in the early tectonics of the formation of the basin in the North West Java area.…”

Section: Regional Tectonicmentioning

confidence: 99%

Analysis of the relationship between porosity and permeability in reservoir modeling using the petrophysical rock type approach

Salindeho

2020

JEMT

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The carbonate reservoir is one of the reservoir characters found in hydrocarbon fields in Indonesia. Carbonate reservoirs have complex porosity and permeability relationships. So it is necessary to do a special reservoir character that is different from the siliciclastic reservoir. Efforts that can be made to assist the development of this hydrocarbon field are to analyze the reservoir character in more detail using the petrophysical rock type (PRT) approach. This approach is used by combining geological elements such as the depositional environment, the petrophysical properties of the rock, as well as the fluid flow in it which is reflected by capillary pressure and water saturation. Modeling with this method is expected to be a method that can increase hydrocarbon production optimally in Xena Field. The object of research from Xena Field is Zone A2 which is included in the Parigi Formation. The Parigi Formation is one of the main hydrocarbon-producing reservoirs. The data used in this study are routine core analysis (RCAL) rock data on JLB-07, JLB-08, JLB-02, JLB-23 wells, wire log data (gamma-ray log, resistivity log, density log, neutron log) of 30 wells, and 2D seismic data. The depositional facies are divided into 2 facies, namely the margin reef platform facies and the interior platform facies. Identification of rock type (RT) using the flow zone indicator (FZI) method. The rock type in this field can be divided into 4 rock types, namely RT 1, RT 2, RT 3, RT 4 with RT 1 being able to drain the best fluid and RT 4 to drain the worst fluid. Reservoir property modeling is controlled by facies and rock type (RT) models. The margin reef platform facies are associated with RT 1 and RT 2. The interior platform facies are associated with RT 2 and RT 3.

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The relationship between Indonesian coal qualities and their geologic histories

Cited by 13 publications

References 12 publications

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

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

Anthropogenic influences on morphological changes in the Progo River, Daerah Istimewa Yogyakarta Province, Indonesia

Analysis of the relationship between porosity and permeability in reservoir modeling using the petrophysical rock type approach

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