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題 名 | 臺南盆地新領域油氣潛能=Hydrocarbon Potential for New Exploration Territory in Offshore Tainan Basin |
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作 者 | 黃富文; 張資宜; | 書刊名 | 探採研究彙報 |
卷 期 | 21 1998.11[民87.11] |
頁 次 | 頁360-392 |
分類號 | 457.2 |
關鍵詞 | 油氣潛能; 臺南盆地; 新領域; Tainan basin; Hydroarbon potential; |
語 文 | 中文(Chinese) |
中文摘要 | 臺南盆地海域由於CFC構造的油氣發現正進入評估開發階段,急需發現新油氣藏 增加開發獲利的籌碼,因而尋找新領域油氣潛能。 在 CFC 構造的探勘期間,探勘區域大部分集中中央隆起帶附近,目標層集中於 CFC 的儲氣 層,漸新統砂岩及白堊系砂岩,因此尋找探勘新領域油氣潛能,或跳出中央隆起帶區域或找 到漸新統砂岩白堊系砂岩以外的目標層,成為本研究之重點。 本研究利用臺南盆地海域多重合的移位二維震測剖面來做構造沉積史的研究, 並利用 Vail 圖解說明的方法進行精確的震測地層研究和按 Vail 的程序進行層序地層分析,並以之與鄰 近的鑽井井測層序地層對比。 除此之外, 本研究並利用二維震測剖面依照 Prosser 所說明的構造震測地層層序的方法, 對義竹斷層附近下中新統以下地層進行構造層序地層分析,以求得其構造沉積體系域並以之 與北海區 Prosser 所敘述的構造層序以及中非裂谷蘇丹半地塹區之構造層序對比, 以求証 實開裂高峰期沉積岩層,亦即生油岩層之存在。 由於過去探勘集中於〞凹中取隆〞式的中央隆起帶上,本研究遂轉而尋找〞遇隆探邊〞式, 在臺南盆地北緣尋找構造封閉的存在。 而在 CFC 構造北方 30 公里處找到有類似義竹斷層 上盤反轉背斜構造,以中部中新世不整合面D為層面來估算其構造圈合面積約有 20 平方公 里。 以層序地層研究看來,該不整合面D以下之地層為南莊層或更老之地層,這些地層大部份為 水道充填之粉砂岩或細粒砂岩層上覆厚層頁岩,直到下中新統地層轉為淺海相,有濱海砂層 出現,而該區構造層序研究顯示構造沉積體系中附近有生油岩-漸新統頁岩存在。 由於該地區震測資料不足,該構造圈閉西北部以虛線表示,而且不整合面並不能代表地層層 面。該構造可能有生油岩及儲集岩存在,若構造圈閉存在則油氣沿鄰近之義竹斷層垂直移棲 至淺層儲集層如南莊層等砂岩中,如八掌溪構造油氣田者之機會極大。 建議該地區加炸震測測線以証實該構造圈閉之存在,並進一步評估鑽探可行性。 |
英文摘要 | The hydrocarbon discovery in the Tainan Basin, offshore Taiwan is at the stage of evaluation for hydrocarbon development. Thus, it is needed to search for new exploration territory to increase the hydrocarbon reserve for more benefits. The new exploration territory in this basin may be either the new target area out of the present Central Uplift Zone or the new pay zone other than the present target bed, the Oligocene sandstone. To achieve this, study methods including seismic interpretation, sequence stratigraphy study according to the methods described by Vail and described by Prosser are performed. Besides, the interpreted sequences are correlated to the nearby drilling well data and compared to the tectonic stratigraphic sequences in half grabens in Sudan. Study results show that there is a roll-over anticlinal structure 30 km north of CFC structure. This structure is located at the down-thrown block of the Yui-Chu fault. The closure area estimated using the D unconformity plane is approximately 20 km ��. According to the sequence stratigraphic strudy, there is the Nanchung formation underlying the D unconformity plane. Correlated with the nearby dilling data, this formation is mainly channel filled siltstone or fine grained sandstone covered by thick shale bed. Tectonic stratigraphy sequences show that those formations in the deeper horizon near the Yui-Chu fault may have potential as hydrocarbon source and matured hydrocarbon may have chance for vertical migration along this fault into the overlain upper formations including the potential resevoir, the Nanchuang formation. Since seismic data in this area are not enough to define the structural closure completely, it is suggested to carry out more seismic survey for hydrocarbon potential evaluation. |
本系統中英文摘要資訊取自各篇刊載內容。