應用氣油比的分佈探討鐵砧山構造及錦水－永和山構造油氣移棲之方向

Inference of the Gas-Oil Ratio Distribution on Tiehchenshan and Chinshui-Yuanhoshan Hydrocarbon Migration Routes

吳明賢(M.S. Wu) ； 胡錦城(C.C. Hu) ； 王乾盈(C.Y. Wang) ； 張國雄(K.H. Chang)

《鑛冶：中國鑛冶工程學會會刊》 52卷2期 (2008/06) Pp. 143-150

https://doi.org/10.30069/MM.200806_52(2).0012

摘要

瞭解油氣源與油氣移棲的方向。不僅對於初期油氣探勘很重要，而且對於後續油氣探勘、井位選定亦可提供重要之導引。本研究利用鐵砧山地區及錦水－永和山構造各油氣井鑽探試油氣時之初期氣油比、生產的歷年之氣油比及剩餘氣油比的分佈圖等，探討油氣移棲的方向。研究結果顯示：1.鐵砧山與永和山構造的油氣產自打鹿砂岩，2.且氣油比有向某方向減少趨勢，推測該方向為油氣移棲方向，就以單層生產與其氣油比分佈可解釋為橫向移棲。3.錦水構造由錦水層至五指山層共有31層油氣生產，氣油比的分布範圍自9300至164000 M^3/kl，目前尚找不出其分佈的規律性。就以多層生產層與其氣油比分佈，可解釋為油氣來自於不同生油岩之垂向移棲。4.由錦水構造與永和山構造氣油比分佈之不同，推測二構造間必有斷層存在。

關鍵字

氣油比 ； 鐵砧山構造 ； 錦水－永和山構造

並列摘要

This study attempts to use the distribution maps of the initial gas-oil ratio, annual production gas-oil ratio and residual gas-oil ratio to infer the hydrocarbon migration direction of Tiehchenshan and Chinshui-Yunghoshan Gas Fields. A good understanding of the hydrocarbon migration path is important in the early oil and gas exploration and in providing guidance for further exploration and exploitation. Results of our study show that: 1. most of hydrocarbon in the Tiehchenshan and Yunghoshan Structures were produced from the single layer of Talu Sandstone; 2. and the distribution maps of the gas-oil ratio showed a decreasing trend from some direction, implying that this direction is laterally hydrocarbon migration. 3. There are 31 gas producing layers in Chinshui Gas Field with the gas-oil ratio ranging from 9,300 to 16,4000 M^3/kl showing no consistent trend within the producing layers, implying that the hydrocarbons may have migrated vertically from different source rocks, 4. and the different migration types and the distribution of the gas-oil ratios infer that a regional fault may exist between the Chinshui and Yunghoshan structures.

並列關鍵字

gas-oil ratio ； the Tiehchenshan Structure ； the Chinshui-Yunghoshan Structure