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通过对横切卡斯珀背斜西翼逆掩断层的一条地震测线资料采集和解释,获得了构造复杂地区的勘探技术。采集306测线的目的是为了勾划一条可疑的隐伏逆掩断层,该地震测线是沿着由露头地层产状确定的真倾向方向敷设的。我们用短排列和高次覆盖获得了质量良好的资料,上盘陡倾地层成像尤为明显。建立了二维构造深度模型。露头地层倾角可以约束解释并有助于制作上盘模型。当构造的合成时间响应(时间模型)与近炮检距剖面的实际反射完全符合时,便证实所建立的模型是正确的。达到完全符合的关健是对上盘的精确描绘,如果隐伏逆掩断裂地层模型的时间响应与实际资料上同一反射的静态时移完全符合,则证实对上盘的描绘是正确的。但是,由于模拟程序和逆掩断层带的复杂性的限制而没有获得完美无缺的深度模型。对于这一勘探对象的目标并未全部达到,如没有发现油气远景地区和未能实现资料的正确偏移等。不管怎样,以往使用的野外采集技术曾提供了良好的记录质量并对静校正问题也作了适当处理。尽管最终深度模型已经达到较高的精度,但是如果采集了交叉测线的话,那么最终深度模型是一张合理而精确的构造图。此外,还必须应用实时交互模拟程序更精确和快速地建立模型。
Through the acquisition and interpretation of a seismic survey data of the transversal fault of the west wing of the Casper anticline, the exploration technology of complex tectonic areas was obtained. The purpose of the acquisition 306 is to delineate a suspicious concealed thrust fault that has been laid along the true direction determined by the outcrop formation. We obtained good quality data with short-range and high-level coverage, particularly on steep-dipping formation images. Established a two-dimensional structure of the depth model. Outcrop stratigraphy can be constrained to explain and contribute to the creation of a plate model. When the constructed composite time response (time model) exactly matches the actual reflection of the near-offset profile, the model established is validated. The key to achieving full compliance is the accurate mapping of the plate, which is validated if the time response of the buried strata model coincides well with the static reflection of the same reflection on the actual data. However, a perfect depth model is not obtained due to the limitations of the simulation program and the complexity of the inverse fault zone. The targets for this exploration target have not been met, for example, no oil and gas prospects and the failure to achieve the correct data offset. However, field acquisition techniques used in the past have provided good recording quality and proper handling of static correction issues. Although the final depth model has achieved higher accuracy, the final depth model is a reasonable and accurate construction drawing if cross-hatching is taken. In addition, models must be built more accurately and quickly using real-time interactive simulators.