台灣新竹海域D構造群油氣生成研究

Geochemical Studies on the Hydrocarbon Generation in the D Structures of Hsinchu Offshore Area, Taiwan

翁榮南(Jung-Nan Oung)

《鑛冶：中國鑛冶工程學會會刊》 39卷1期 (1995/03) Pp. 131-137

摘要

本研究整合台灣新竹海域D構造群生油岩評估及油氣分析資料，探討D地塊的油氣生成來源。生油岩評估顯示木山層的煤層及煤頁岩有機富集度甚高，氫指數達200mg HC/g TOC以上，具良好油氣生成潛能，且活化能低，可於近成熟階段生成油氣，為本區重要的油氣源岩。本區所鑽獲之油氣經地化分析顯示其成熟度不高，凝結油富含環烷烴，其生物指標含大量雙環倍半萜烷及二萜烷，且具有獨特的五環非霍烷萜類，此均為煤成油之特徵，應爲鄰近煤有機質的低成熟產物，屬自生自儲型油氣藏。本研究證實D地塊煤成油氣的存在，顯示台灣的含煤地層與油氣有密切關係，應是未來重要的油氣探勘目標之一。

並列摘要

Geochemical studies, including source rock evaluation and hydrocarbon characterization, have been carried out to reveal the hydrocarbon generation in the D structures of Hsinchu offshore area, Taiwan. The evaluation of source rock indicated that the coal-bearing Mushan Formation is early mature. The coal and coaly shale in the Mushan Formation, with high hydrogen index and low activation energy for hydrocarbon generation, shows good hydrocarbon generation potential in the early maturation stage. The hydrocarbon characterization indicates that the condensates recovered from the Mushan Formation is low mature coal-derived oil. This study confirms the presence of coal with high oil generation potential and coal-derived, oil in the D structures. The coal-bearing formations therefore should be of highl potential for hydrocarbon exploration in Taiwan.