台灣西北部生油岩生成油氣相態及潛量研究

Petroleum Phase and Potential Analyses of Source Rocks in Northwestern Taiwan

郭政隆(Cheng-Lung Kuo) ； 林麗華(Li-Hua Lin) ； 沈俊卿(Jun-Chin Shen) ； 張錦澤(Ching-Tze Chang)

《鑛冶：中國鑛冶工程學會會刊》 46卷3期 (2002/09) Pp. 161-174+160

https://doi.org/10.30069/MM.200209_46(3).0014

摘要

本文收集標準類型Type 1、II、III生油岩各種地化分析資料，探討其生產油氣相態及潛量，作為評估未探勘地區生油岩潛能的參考。並研究台灣西北部下部中新統及漸新統生產油氣相態及潛量，提供油氣探勘參考。研究結果顯示台灣西北部下部中新統及漸新統以木山層、五指山層煤頁岩及煤最具生產油氣潛能，屬Type III生油岩，其油氣具陸源有機物來源的特性，以產天然氣為主，伴產凝結油，及含高蠟份且富含芳香烴原油，C25－C33有奇數碳偏好現象，且Pr/Ph大於3，顯示偏氧化環境，但其生產油氣潛能優於典型Type III Mahakan三角洲生油岩，每克有機碳可生產200－500毫克碳氫化合物。

關鍵字

生油岩類型 ； 油氣相態 ； 油氣潛量

並列摘要

This study summarizes the geochemical parameters of Type I, II, and III source rocks, and correlates the phases and potential of hydrocarbon with corresponding type source, in an attempt to construct a reference for source rock evaluation in unexplored area. Bared on this standard reference, the generation potential of Lower Miocene and Oligocene formations in northwestern Taiwan has been evaluated. Preliminary result indicates that coaly shales and coals in the Mushan Formation and the Wuichishan Formation show the most prospective potential. The source rocks can be attributed to Type III,m which demonstrate typical characteristics of terrestrial origins. The generated hydrocarbon mainly comprises of gas, with subordinate condensates and waxed aromatic-rich oils. Odd carbon number predominance in C_(25)-C_(33) and high Pr/Ph (＞3) . suggesting an oxidizing environmen, are also observed. The generation potential is estimated to range from 200 to 500 mgHc/gTOC, which is superior to that of Type III Mahakan Delta source rock.

並列關鍵字

Source rock type ； Hydrocarbon phase ； Hydrocarbon potential