塔里木河融冰期寬方位三維地震采集方案動態(tài)優(yōu)化設計與精細化施工——以YML2井南三維項目為例
發(fā)布時間：2019-03-17 12:03
【摘要】：在塔里木盆地塔克拉瑪干沙漠中的塔里木河區(qū)域,地震野外采集作業(yè)最佳時間是當年12月至翌年1—2月的冰凍期。在2014年YML2井南寬方位三維地震勘探中,2月份融冰期提前到來,融冰期前后的塔里木河寬度、邊界及潛水面高程發(fā)生大的變化。融冰期內,氣候條件復雜多變,塔里木河頻繁出現水進或水退,融冰和結冰時常轉換,檢波點和炮點被水淹的區(qū)域和數目變化很大,前期過塔里木河設計的采集方案在施工中不能正常實施,需要不斷更新或調整。針對融冰期前后不斷變化的水文地質條件對地震野外采集造成的諸多不良影響,采用高精度遙感信息技術,實時跟蹤和掌控水文地質條件變化,探索和應用初始動態(tài)設計和滾動優(yōu)化設計觀測系統的思路和方法,及時偏移、恢復或增加塔里木河障礙區(qū)檢波點和炮點,周密組織進行精細化地震野外作業(yè),使實際施工參數盡力達到冰凍期的正常設計水平。應用結果表明,獲得了高信噪比、高分辨率的寬方位三維地震資料,效果良好。
[Abstract]:In the Tarim River region in the Taklimakan desert of Tarim Basin, the best time for seismic field acquisition is the freezing period from December of that year to January to February of the following year. In the three-dimensional seismic exploration of south wide azimuth of YML2 well in 2014, the ice melting period arrived early in February, and the width of Tarim River, the boundary and the elevation of subsurface water surface changed greatly before and after thawing period. During the melting period, the climatic conditions were complex and changeable, the Tarim River frequently appeared water inflow or retreat, thawing and freezing often changed, and the area and number of detection points and gun points flooded by water varied greatly. The collection scheme designed by the Tarim River in the early stage can not be carried out normally in the construction, so it needs to be updated or adjusted continuously. In view of many adverse effects caused by the changing hydrogeological conditions before and after the ice melting period on seismic field acquisition, high precision remote sensing information technology is used to track and control the change of hydrogeological conditions in real time. To explore and apply the ideas and methods of the initial dynamic design and rolling optimization design observation system, to offset in time, to restore or increase the detection points and shot points in the obstacle area of the Tarim River, and to organize carefully the fine seismic field operations. The actual construction parameters can reach the normal design level of freezing period as far as possible. The application results show that the wide azimuth 3-D seismic data with high signal-to-noise ratio and high resolution are obtained and the result is good.
【作者單位】： 中國石油集團川慶鉆探工程有限公司地球物理勘探公司;
【分類號】：P631.4
，
本文編號：2442281
[Abstract]:In the Tarim River region in the Taklimakan desert of Tarim Basin, the best time for seismic field acquisition is the freezing period from December of that year to January to February of the following year. In the three-dimensional seismic exploration of south wide azimuth of YML2 well in 2014, the ice melting period arrived early in February, and the width of Tarim River, the boundary and the elevation of subsurface water surface changed greatly before and after thawing period. During the melting period, the climatic conditions were complex and changeable, the Tarim River frequently appeared water inflow or retreat, thawing and freezing often changed, and the area and number of detection points and gun points flooded by water varied greatly. The collection scheme designed by the Tarim River in the early stage can not be carried out normally in the construction, so it needs to be updated or adjusted continuously. In view of many adverse effects caused by the changing hydrogeological conditions before and after the ice melting period on seismic field acquisition, high precision remote sensing information technology is used to track and control the change of hydrogeological conditions in real time. To explore and apply the ideas and methods of the initial dynamic design and rolling optimization design observation system, to offset in time, to restore or increase the detection points and shot points in the obstacle area of the Tarim River, and to organize carefully the fine seismic field operations. The actual construction parameters can reach the normal design level of freezing period as far as possible. The application results show that the wide azimuth 3-D seismic data with high signal-to-noise ratio and high resolution are obtained and the result is good.
【作者單位】： 中國石油集團川慶鉆探工程有限公司地球物理勘探公司;
【分類號】：P631.4
，
本文編號：2442281
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