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Use of petrological and organic geochemical data in determining hydrocarbon generation potential of coals: miocene coals of Malatya Basin (Eastern Anatolia-Turkey)
International Journal of Coal Science & Technology Pub Date : 2020-11-21 , DOI: 10.1007/s40789-020-00376-3
Nazan Yalcin Erik , Faruk Ay

With this study, the hydrocarbon generation potential of Miocene aged coals around Arguvan-Parçikan in the northern district of Malatya province was evaluated with the aid of petrological and organic geochemical data. According to organic petrography, coal quality data, and low thermal maturity, the Arguvan-Parçikan coals are of high-ash, high-sulfur subbituminous B/C rank. The organic fraction of the coals is mostly comprised of humic group macerals, with small percentages derived from the inertinite and liptinite groups. The mineral matter of the coals is comprised mainly of calcite and clay minerals. The total organic carbon (TOC, wt%) values of the shale and coal samples are between 2.61 wt% and 43.02 wt%, and the hydrogen index values are between 73 and 229 mg HC/g TOC. Pyrolysis (Tmax, PI), huminite/vitrinite reflectance (Ro, %), and biomarker ratios (CPI, Pr/Ph ratio, Ts/(Ts + Tm) ratio, C32 homohopane ratio (22S/22S + 22R) and C29 ββ/(ββ + αα sterane ratio) indicate that the organic matter of the studied coals is thermally immature. When all these data are taken together, Miocene aged coals around Arguvan are suitable for hydrocarbon generation, especially gas, in terms of organic matter type (Type III and Type II/III mixed), organic matter amount (> 10 wt% TOC), however, low liptinitic macerals (< 15%–20%), low hydrogen index (< 200 mg HC/g TOC) and low thermal maturity values inhibit the hyrocarbon generation.



中文翻译:

利用岩石和有机地球化学数据确定煤的烃生成潜力:马拉塔亚盆地(东安纳托利亚-土耳其)的中新世煤

通过这项研究,借助岩石学和有机地球化学数据,对马拉塔亚省北部Arguvan-Parçikan附近的中新世老煤的生烃潜力进行了评估。根据有机岩相学,煤炭质量数据和较低的热成熟度,Arguvan-Parçikan煤属于高灰分,高硫的次烟煤B / C级。煤的有机部分主要由腐殖质类的辉石组成,其中很小的一部分来自惰质和锂质族。煤的矿物质主要包括方解石和粘土矿物。页岩和煤样品的总有机碳(TOC,wt%)值为2.61 wt%至43.02 wt%,氢指数值为73至229 mg HC / g TOC。热解(T max,PI),腐殖质/镜质体反射率(R o,%)和生物标志物比率(CPI,Pr / Ph比率,T s /(T s +  T m)比率,C 32均聚物比率(22S / 22S + 22R)和ç 29 ββ /(ββ  +  αα甾烷比率)表明所研究煤炭的有机物是热不成熟的。综合所有这些数据,就有机质类型(III型和II / III型混合),有机质含量(TOC> 10 wt%),然而,低脂脂肪蛋白(<15%–20%),低氢指数(<200 mg HC / g TOC)和低热成熟度值会抑制烃的生成。

更新日期:2020-11-22
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