摘要
南缘逆掩推覆带是三塘湖盆地油气勘探的主攻区带之一。受逆掩推覆高速体的影响,地震反射波射线路径发生严重畸变,在逆掩断层下盘产生断层阴影、虚假构造或构遣高点偏移等现象,给构造的解释与成图带来了困难。通过模型正演技术以射线追踪理论和波动方程理论为基础,构建初始地质模型,演绎自激自收地震剖面,并通过迭代修改、校正地质模型,使演绎自激自收地震剖面最大限度逼近实际地质剖面,从而构造较真实的地质模型。在南缘推覆逆掩带等复杂构造地区的解释成图中取得了一定的应用效果。
The overthrust belt at the south edge of Santanghu basin is the main exploration target. However, the ray path of seismic reflected wave in this region distorts seriously due to the effects of overthrust high speed layers, which make it difficult to interpret and image the structures. An initial geologic model is constructed by use of forward modeling on the basis of ray tracing and wave equation, and this model is corrected by iteration, so that a fairly real geologic model can be obtained.
出处
《吐哈油气》
2002年第2期171-174,199,共5页
Tuha Oil & Gas
