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題名 | 基盤高區與油氣探勘=Basement High and Petroleum Exploration |
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作者姓名(中文) | 李長之; | 書刊名 | 石油季刊 |
卷期 | 33:4 1997.12[民86.12] |
頁次 | 頁1-13 |
分類號 | 457.2 |
關鍵詞 | 基盤高區; 生油母岩; 油氣探勘; Basement High; Source rock; Petroleum exploration; |
語文 | 中文(Chinese) |
中文摘要 | 在晚漸新世及早中新世時,北港高區並不存在, 只有雲彰古陸突出海平面,雲彰 古陸面積接近兩千平方公里,為其周圍的漸新統及下部中新統的區域性沉積來源。北港高區 目前雖然比雲彰古陸為高,但其抬升在早中新世以後。雲彰古陸以南的殘存湖相始新統,為 雲彰地區最好的生油母岩,故接觸到殘存始新統之砂岩都是本區的最佳生油組合。至於北港 高區較具油氣潛能的地區則在接近義竹斷層的下部中新統。澎湖脊係雲彰古陸向西南海域的 延伸,其存在可由該區之島嶼的地表及地下地質得到支持的證據。該構造高區在始新世時分 隔了位於其北邊延伸至北方海域的始新世海盆以及位於其南邊的較封閉的張裂性盆地,該張 裂盆地內有機物含量相當高,值得特別注意。因此基盤高區容易形成封閉構造,聚集探勘人 員的注意,但若缺乏生油母岩亦屬枉然。 |
英文摘要 | Previous study indicated that the Peikang High is a structural dam between the northern and southern basins of Taiwan and is mainly composed of Cretaceous sedimentary rock. This study identified a Paleocene High. which is composed of intermediate to acid igneous rocks north of the Peikang High. The High is the southern boundary of the northern basin and is named the "Yun-Chang Paleo-High" by the authors. The relict Eocene around the Yun-Chang Paleo-High and the Lower Miocene south of the Yichu Fault are the only two good source rock formations in the Changhua-Yunlin area. The exploration strategy there is to identify structural traps on the top or the vicinity of the relict Eocene formations. As to the Peikang High, the Lower Miocene source rock is immature and the underlying Cretaceous does not contain any good source rock. Therefore the exploration strategy for the Peikang High should aim to explore the relict Eocene and the moderately mature Lower Miocene located on either the north or the High because only these two formations are mature enough to generate hydrocarbons. |
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