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复杂构造地区的勘探方法,已根据穿过 Casper 背斜逆断层西翼的一条地震测线的记录及解释取得。为了圈定假想的逆断层下的勘探远景区,作了306号测线。这条测线是按出露地层产状沿真倾角的方向布置的。我们应用短排列和高次叠加,取得了好的资料质量,尤其是断层上盘陡倾角的成像。构造的二维深度模型已经建造。露头倾角虽不利于解释,但却有助于上盘的模拟。当合成时间响应(时间模型)与近偏移距剖面实际反射相匹配时,证明模型是正确的。这种匹配的关键是上盘的精确圈定:即当逆断层下的地层的模型时间响应与实际资料上这些相同反射的静态时移相匹配即可证明是正确的。但理想的深度模型不易取得,因为受到模拟程序和逆断层复杂带的影响。设计的目的没能全部满足,比如:没有发现勘探远景区以及从未对资料进行合适偏移。然而,所用的野外方法已提供了好的记录质量,而且充分地解决了静校正问题。最后的深度模型是一个较精确的构造图。不过,若横剖面可利用,那么构造图的精度还可提高。此外,如果应用人机联作模拟程序,模型可以建造得更精确而且省时。
Exploration methods in complex tectonic areas have been derived from the recording and interpretation of a seismic line passing through the western wing of the Casper anticline. In order to delineate the hypothetical inverted prospect exploration area, made line 306. This line is arranged according to the true dip angle of the exposed formation. We applied short alignment and high-order overlays to achieve good data quality, especially for steep-angle tomography of faults. The constructed two-dimensional depth model has been constructed. Outcrop dip is not conducive to explanation, but it helps to simulate the plate. When the composite time response (time model) matches the actual reflection of the near-offset profile, the model is proved to be correct. The key to this match is the exact delineation of the plate: that is, the model time response of the formation below the reverse fault matches the static time shift of these same reflections on the actual data. However, the ideal depth model is not easily accessible because of the impact of the simulation program and the complex zone of reverse faults. The purpose of the design has not been fully met, for example: no prospecting prospects have been found and the data have not been properly deflected. However, the field methods used have provided good recording quality and have adequately addressed the problem of static correction. The final depth model is a more accurate structure. However, if the cross-section is available, then the accuracy of the map can be improved. In addition, the model can be built more accurately and time-saving if human-computer interaction simulations are applied.