| 摘要: | 為因應日漸減少的化石燃料能源，尋找替代能源和舊油氣井重開發是目前發展方向。本研究目的是將中國富含產氣潛能煤樣與台灣煤樣進行比對來了解有機材料成分對油氣潛能評估的影響。本研究樣本採自中國東部主要油氣資源區山東黃縣盆地龍口漸新世褐煤，臺灣煤樣取自苗栗明德出磺坑背斜中新世東坑層露頭煤樣與後龍溪木山層頁岩、北投貴子坑漸新世五指山層、三民花草林中新世南莊層與平雙隧道南口中新世木山層。研究方法為:煤素質組成和鏡煤素反射率(Ro%)檢測、熱裂分析、總有機碳(TOC)評估、熱裂氣相層析及元素組成，對材料特性和油氣潛能進行探討。結果顯示龍口樣本以富含蠟質植物體為主，在成煤過程中可能受較多營力的影響，使抗侵蝕能力較強的膜煤素材料保存較完整，屬於III型未成熟煤且HI值偏高，油氣潛能偏高；明德樣本以陸生植物為主，鏡煤素含量比例較高，成煤過程中受較強風化作用，所以具有較多岩屑或黏土礦物，屬於II、III型未成熟煤，HI值偏高；後龍溪樣本為台灣典型煤素質組成， Ro%為1.26進入氣窗，屬於III型油母質，為較良好產氣材料，但有機質含量不多，故油氣潛能不佳；北投樣本岩屑與黏土礦物含量高達76%，Ro%為0.69進入油窗，為成熟煤頁岩之III型油母質，但TOC含量低，因此油氣潛能不佳；三民與平雙樣本結果顯示皆為台灣典型煤素質組成，鏡煤素含量高，三民屬於II、III型未成熟煤，平雙則是III型未成熟煤，HI值偏高，亦屬於材料良好，油氣潛能最佳。綜合上述指出材料特性、來源與沉積環境均影響樣本成熟度、有機型態與油氣潛能。;In recent years, along with the growth of conventional hydrocarbon resources being rapidly utilized, the exploration of unconventional deposits is getting more and more important. This research discussed the relationship among characteristics and thermal maturity of different organic material versus their hydrocarbon potential. In order to compare the compositional effects from different organic material, Oligocene brown coal from Longkou, China, Miocene Tungkeng Formation humic coal and Mushan Formation shale from Chuhuangkeng anticline (one of the most productive oil and gas fields), Beitou Guitzikeng pit Wuchishan Formation coal shale, Miocene Sanmin Nanchuang Formation coal, Miocene Pinshuang tunnel Mushan Formation coal, including field outcrop and well cutting coal samples were examined. Methods of study include petrographic analysis, vitrinite reflectance measurement (Ro%), Rock-Eval pyrolysis, Py-GC and elemental analysis. Longkou sample has relatively low maturation with vitrinite reflectance 0.44%, belong to type III kerogen; vitrinite reflectance of the Mingde sample is 0.40%, along with some methane explored, belong to type II, III kerogen; Vitrinite reflectance of Beitou Guitzikeng pit sample is 0.69%, belong to type III kerogen. Both Sanmin and Pinshuang samples have high proportion of vitrinite, Sanmin sample belongs to type II, III kerogen and Pinshuang sample belongs to type III kerogen. The analytic results indicate that the characteristics of organic matters affect their maturity in coalification process. Although the thermal history and depositional environments are different for samples studied, their organic micelles still exhibit a similar trend in the process of coalification. |
