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題 名 | 永和山氣田生產末期最佳生產方式之研究(下)=Study of the Optimized Production Model after Primary Producing Stage for the YHS Gas-Condensate Reservoir (2) |
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作 者 | 吳柏裕; 彭日昇; 王墨江; 王勝雄; | 書刊名 | 鑛冶 |
卷 期 | 42:3=163 1998.09[民87.09] |
頁 次 | 頁132-143 |
分類號 | 457.2 |
關鍵詞 | 凝結油氣層; 成份模擬程式; 注氣循環; Gas-condensate reservioir; Compositional simulator; Gas cycling; |
語 文 | 中文(Chinese) |
中文摘要 | 永和山氣田為一斷層背斜封閉,面積約 3.8 平方公里,生產層之深度約 3100 ~ 3400 公尺, 屬逆變凝結油氣田, 生產過程中氣層會有凝結油凝聚, 致此種氣田之採 收率通常偏低。根據以成份模擬程式( Compositional Simulator )模擬之結果,此氣田 在自然涸竭之累計採收率為天然氣 59%,凝結油僅 35%。根據文獻報導,對凝結油氣田之開 發,最好在降壓至產生凝結油之前即採汪氣循環之方法生產。 因目前氣層壓力已甚低,本研究乃提出三種可能之末期生產方式加以研究,第一種方式是利 用出磺坑半透膜排放廢氣做注氣循環。第二種方式是設其為自然涸竭輔以昇壓方式生產,電 腦模擬其廢棄壓力 500psi 時最終採收結果,研究其經濟效益。第三種方式是選取一口井注 氣一段時間,接著生產一段時間,如此重複行之,電腦模擬研究其最終採收結果,檢討其經 濟效益。 本研究最後比較此三種生產方式之投資與經濟效益,研究結果顯示,其第二種方式為最佳生 產方式, (設其為自然涸竭輔以昇壓方式生產),估計可增產天然氣 3.2 億立方公尺,凝 結油 8.02 萬公秉。另根據經濟分析,投資額 4,000 萬元,以氣價每立方公尺 5,455 元及 油價為每公秉 2800 元計,其投資報酬率為 655%, 回收年限為 1.2 年,淨現值為 7.9 億 元(在 10% 折現率下),極具經濟效益,值得考慮採行。 |
英文摘要 | The YHS gas field, a retrograde gas condensate reservoir, is a faulted anticlinal trap with an area of 3.8 km��. According to the results of the compositional simulator, the current gas and oil recovery factors are 59% and 35%, respectively. Generally, the best way to develop the gas condensate field is to produce hydrocarbon with gas cycling before reservoir pressure is declined below dew-point pressure. Unfortunately, YHS field already produced most of the hydrocarbon. Reservoir pressure has declined below dew-point for a long time. Therefore, the purpose of this study is to figure out the best scheme of production for the final development stage of the YHS field. The study result shows that when the YHS field continually produces hydrocarbon with boosting gets the most economical recovery. Owing to depleted production with poosting, the production of natural gas can be increased by 320 MMSCM and that of the condensate by 802,000 KL. According to economical analysis, the amount of investment is NT$40 millions, the rate of return is 655% and the net present value is NT$790 millions at 10% discount rate. Therefore, the investment of this production scheme deserves to consider. |
本系統中英文摘要資訊取自各篇刊載內容。