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Hydrocarbon Source Potential of Coal-bearing Tikak-Parbat Formation of Barail Group in a Part of the Belt of Schuppen, India
Journal of the Geological Society of India ( IF 1.3 ) Pub Date : 2021-07-10 , DOI: 10.1007/s12594-021-1758-3
Prasun Banik 1 , Sarat Phukan 2 , Minati Das 3
Affiliation  

The Oligocene succession of the Tikak Parbat Formation has prominent coal bearing horizons. The formation comprises of medium to coarse grained light coloured sandstone, clay and carbonaceous shale with four workable coal seams. Core samples from two wells has been studied with regards to organic matter content and type. Relatively high total organic carbon (TOC) contents are present (average 72.103 wt %) in coal; the hydrogen index (HI) values reach a maximum of 410 mg HC/g TOC, indicating presence of type III-II kerogen, and the organic matter is thermally immature (Tmax 428°C) in coal. The genetic potential have maximum yield of 246.53 mg/g, so the coal deposits could act as an excellent source rock for hydrocarbons if the burial depth is sufficient. Carbonaceous shale samples are at early mature stage (Tmax 438°C). Kerogen at this maturity level is within oil window and is capable of generating oil and thermogenic gas upon thermal cracking. The study highlights dense accumulation of reactive macerals (vitrinite + liptinite) and low concentration of inertinite. The empirically derived values for coal reveal a high conversion (>90%) and oil yield (>60%).



中文翻译:

印度Schuppen部分带Barail群含煤Tikak-Parbat组烃源潜力

Tikak Parbat 组的渐新世系列具有突出的含煤层位。该地层由中至粗粒浅色砂岩、粘土和碳质页岩组成,具有四个可开采煤层。研究了来自两口井的岩心样品的有机质含量和类型。煤中存在相对较高的总有机碳 (TOC) 含量(平均 72.103 wt%);氢指数(HI)值最高可达 410 mg HC/g TOC,表明存在 III-II 型干酪根,煤中有机质热不成熟(T max 428°C)。成因潜力最大产量为246.53 mg/g,如果埋藏深度足够,煤层可以作为优质烃源岩。碳质页岩样品处于早期成熟阶段(T最高438°C)。该成熟度的干酪根在油窗内,能够在热裂解时产生油和热成因气。该研究突出了反应性微晶(镜质体 + liptinite)的密集积累和低浓度的惰性。根据经验得出的煤值显示出高转化率 (>90%) 和石油收率 (>60%)。

更新日期:2021-07-12
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