查詢結果分析
來源資料
相關文獻
- 非水平地表面擬似譜法逆時移位技術研究「重合前」
- 震測資料擬似譜法重合前逆時移位技術研究
- 震測資料擬似譜法重合前逆時移位技術研究
- 擬似譜法逆時移位技術研究及其在資料處理系統上之應用(2/2)--重合前逆時移位技術研究
- 非水平地表面擬似譜法重合前逆時移位技術研究
- 擬似譜法重合前逆時移位
- 複雜斷層構造之整合解釋和油氣封閉之關係--震測重合前逆時移位之測試
- Combined Grey Relational Analysis/Differential Dynamic Programming for Short-Term Hydro Generation Scheduling
- 非水平基準面擬似譜法逆時移位技術研究「重合後」
- An Improved Computational Scheme for Solving Dynamic Optimization Problems with Iterative Dynamic Programming
頁籤選單縮合
題名 | 震測資料擬似譜法重合前逆時移位技術研究=Pre-stack Reverse Time Migration by Pseudospectral Method |
---|---|
作者 | 徐祥宏; 宣大衡; 梁守謙; | 書刊名 | 鑛冶 |
卷期 | 43:2=166 1999.06[民88.06] |
頁次 | 頁57-66 |
分類號 | 457.2 |
關鍵詞 | 重合前深度移位; 重合前逆時移位; 動態規劃法; 擬似譜法; Pre-stack depth migration Pre-stack reverse time migration; Dynamic programming approach; Pseudospectral method; |
語文 | 中文(Chinese) |
中文摘要 | 逆時移位為一深度移位技術,它適用於地層傾角陡峭,速度對比強烈之地質情況 ,本研究依據有關理論與方法,進行重合前逆時移位技術之建立,依據重合前深度移位之成 像原理,重合逆時移位前係由三大步驟所構成,一為震源場之傳播時間計算,二為地表記錄 波場之後向傳播, 三為成像條件之構成。 對於震源場之傳播時間計算, 本研究依據 Schneider(1992) 建立動態規劃法震波走時計算技術,對於地表記錄波場之後向傳播,本研 究依據相關理論與方法,建立擬似譜法逆時波場外插技術,進而結合上述二步驟,依據成像 條件,完成重合前逆時移位技術之建立。經由多種地質模型之合成震波資料測試結果,顯示 此重合前逆時移位技術具有相當良好之準確與可靠性,而海域實際震測資料之測試結果顯示 此移位技術已具可用性,然欲提昇其實效性,尚須配合重合前移位速度分析技術之建立。 |
英文摘要 | Reverse time migration is a depth migration technique and is suitable for geological structures with steep dips as well as strong velocity contrasts. According to the related theories and methods, establishment of pre-stack reverse time migration technique is progressed in this study. In accordance with the imaging principle of the pre-stack depth migration, the pre-stack depth migraton is constituted by three major steps. The first is the traveltime computation of source wavefield. The second is the backward propagation of wavefield recorded on the surface. The third is the constitution of imaging condition. For traveltime computation of source wavefield, the dynamic programming approach to traveltime computation has been established according to Schneider (1992). For backward propagation of wavefield recorded on the surface, the technique of pseqdospectral reverse time wavefiled extrapolation has been established according to the related theories and methods. Through combination of the above-mentioned two steps, establishment of pre-stack reverse time migration technique has been completed according to the imaging principle. From migration tests of synthetic data of various geological models, the results reveal that this prestack reverse time migration technique has good accuracy as well as reliability, and that from migration of offshore field data, the results also reveal its availability for real data. In order to enhance the effectiveness of this migration, the technique of pre-stack migration velocity analysis must be established. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。