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題名 | 震測資料逆推處理與其應用實例分析研究=Seismic Inversion Methodology and Application for Lithology Prediction |
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作者姓名(中文) | 張資宜; 梁守謙; 邱瑞琅; 楊育良; 姜智文; | 書刊名 | 臺灣石油地質 |
卷期 | 37 民94.12 |
頁次 | 頁79-96 |
分類號 | 457.2 |
關鍵詞 | 東引島盆地; 油氣探勘; 震測逆推處理; |
語文 | 中文(Chinese) |
中文摘要 | 礦區評估初期,往往缺乏井測資料或僅局限於構造高區才有井測資料,此時震測資料逆推處理將提供有意義的地下地層信息,逆推處理常借重資料的重合速度,它提供比較正確和可靠的低頻趨勢模型,此模型影響震測逆推結果至巨,尤其是用逆推結果來定量解釋地層岩石物性時,更需要此一穩定可靠之低頻模型,重合速度在震測逆推技術之應用,將是初期探勘階段之重要工作;而發展低頻趨勢模型之過程中,著重重合速度資料之品質控制,避免取樣誤差並確保與區域性地質趨勢之一致,實際應用於海域東引島盆地中,缺乏井測資料控制探勘目標之震測逆推處理程序,其逆推結果之聲波阻抗剖面圖充份展示整個張裂期的沖積扇的環境發育及變化;亦可用於探勘目標儲集層良窳之判斷依據,研判其在空間中之可能分佈,實有助於各探勘目標優先順序之解釋與評估。 |
英文摘要 | During the early stage of exploration of an area, usually there is little well information, or only a few wells limited to the structure highs. For the most part of the area of interest, seismic stacking velocity generally can provide a more accurate and reliable constrain for the ultra-low frequency trend in seismic inversion. The low-frequency trend model will significantly affect the pseudo impedance values of the result of seismic inversion, especially when using the inversion results in lithologic interpretation. The precesses of the application of stacking velocity in seismic inversion are wavelet extraction, geologic framework building, low-frequency model building and parameter optimization for constrained sparse spike inversion. The important steps of the process of low-frquency model building are the quality control of velocity data and the ensuring consistency between the regional compaction trend and the velocity models. We have applied this approach to appraise the hydrocarbon potential of the Tungyintao Basin in identifying the low impedance effect of gas sand in the shallow formation, and predicting the development of alluvial fan facies for the syn-rifting sediments. This technique is also useful in evaluating the quality and distribution of potential reservoirs, for prioritizing exploration leads and prospects. |
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