火焰山构造带构造成图方法研究

THE STUDY OF IMAGING METHOD FOR HUOYANSHAN STRUCTURAL BELT

吐哈盆地火焰山构造带地下为高陡复杂构造,断层上下盘地层速度在纵向和横向上变化剧烈,使钻井结果与地震资料提供的成果存在很大的差异。针对速度场复杂多变这一难点,从层速度模型正演出发,确定火焰山地区的速度控制层,利用钻井资料和地震剖面进行层速度计算,编制断层上下盘层速度平面图,建立纵向层速度场进行时深转换,分别编制断层上下盘的构造图,探索出一套适合火焰山构造带的构造成图方法。

There are steep structures under the Huoyanshan structural belt,and the speed in upper wall and lower wall of the Huoyanshan fault changes greatly,which lead to great differences between drilling outcomes and results offered by seismic data.In view of difficulty of the complicated and changeful velocity field,a series of effective ways of structural imaging for the Huoyanshan structural belt have been found out.These include setting out from forward modeling of interval velocity,confirming the control layer of velocity in the Huoyanshan region,using drilling data and seismic profile to calculate interval velocity,editing plan view of interval velocity,building vertical interval ve- locity field to carry out time-depth conversion and accomplishing structural map of upper wall and lower wall sepa- rately.