High heat flow effects on a coalbed methane reservoir, East Kalimantan (Borneo), Indonesia

A regional review and new insights into SE Asian Cenozoic coal-bearing sediments: Why does Indonesia have such extensive coal deposits?

“…33 graded, though over a fairly large area (Moore et al, 2012(Moore et al, , 2014Nas, 1994;Santoso and Daulay, 2009).…”

“…The thickness of individual coal seams within the Balikpapan Formation varies from less than one metre to 13 m in some places (Land and Jones, 1987;Moore et al, 2014;Nas, 1994;Widodo et al, 2010;Win et al, 2014), though in some areas, coal beds can be more thickly developed (e.g., Nas, 1994). A study by Moore et al (2014) …”

Petrographic characteristics of selected tertiary coals from Western Indonesia according to their geological ASPECTS

“…The most obvious trend for the Sumatran and western Java coals is the decrease in the proportion of liptinite and the increase in the proportion of vitrinite from Neogene to Palaeogene (Santoso and Daulay, 2007;Daulay and Santoso, 2008). In contrast, in the Kalimantan coals, the main trend is the increase in the proportion of liptinite and decrease in the proportion of vitrinite from Neogene to Palaeogene Daulay, 2005b, 2005c;Moore, Bowe and Nas, 2014;Santoso, 2015). Vitrinite in the coals unaffected by contact alteration (including Palaeogene and Neogene) comprises thick detrovitrinite matrix interbedded with thin bands of telovitrinite.…”

“…Neogene coal measures are present in the Kutai and Barito Basins (Santoso and Daulay, 2005c;Daulay, Santoso and Ningrum, 2015 (Santoso and Daulay, 2005c;Moore, Bowe and Nas, 2014). The Upper Balikpapan Formation contains a greater proportion of sandstone, the deltaic sequence becoming more strongly influenced by fluvial processes.…”

“…Vitrinite-rich coal in some cases has a high content of mineral matter. Belkin et al (2009), Widodo et al (2010 and Moore et al (2014) noted that many seams deposited in areas of rapid subsidence have both high vitrinite content and a high mineral content present as discrete dirt bands.…”