塔里木河融冰期宽方位三维地震采集方案动态优化设计与精细化施工——以YML2井南三维项目为例
发布时间：2019-03-17 12:03
【摘要】：在塔里木盆地塔克拉玛干沙漠中的塔里木河区域,地震野外采集作业最佳时间是当年12月至翌年1—2月的冰冻期。在2014年YML2井南宽方位三维地震勘探中,2月份融冰期提前到来,融冰期前后的塔里木河宽度、边界及潜水面高程发生大的变化。融冰期内,气候条件复杂多变,塔里木河频繁出现水进或水退,融冰和结冰时常转换,检波点和炮点被水淹的区域和数目变化很大,前期过塔里木河设计的采集方案在施工中不能正常实施,需要不断更新或调整。针对融冰期前后不断变化的水文地质条件对地震野外采集造成的诸多不良影响,采用高精度遥感信息技术,实时跟踪和掌控水文地质条件变化,探索和应用初始动态设计和滚动优化设计观测系统的思路和方法,及时偏移、恢复或增加塔里木河障碍区检波点和炮点,周密组织进行精细化地震野外作业,使实际施工参数尽力达到冰冻期的正常设计水平。应用结果表明,获得了高信噪比、高分辨率的宽方位三维地震资料,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.
【作者单位】： 中国石油集团川庆钻探工程有限公司地球物理勘探公司;
【分类号】：P631.4
，
本文编号：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.
【作者单位】： 中国石油集团川庆钻探工程有限公司地球物理勘探公司;
【分类号】：P631.4
，
本文编号：2442281
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