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近几年,叙述垂直地震剖面(VSP)的记录、处理和应用的著作已经迅速增加.这些著作对识别多次波规律的技术,对岩性观测井整个深度上的地层响应的对比,对大于钻井总深度的各深度上一次反射响应的改进估算及对下行波波形的估计都作了详尽的描述. 虽然,在实际应用中,很多情况下用垂直地震剖面可补充和改进地面地震资料的地质解释的可靠性,但现有的例子是极少的。本文将叙述两个特殊的例子: 一个是在远东的预测的例子——在钻遇礁下基底灰岩之前对它进行辨认.在此例中,没有足够数量的地面地震资料可用来绘制目的层的图,但是记录的垂直地震剖面资料却显示了识别基底灰岩的可靠标志,尽管基底灰岩处在4300英尺的井深之下. 另一个是北海的例子——改善不整合面和被不整合面截断的下伏砂岩的清晰度.在这个例子中,垂直地震剖面是在钻穿了目的层的斜井中记录的,因而得到了有意义地层的地震剖面。用垂直地震剖面资料分辨地质目的层可能比用地面记录的地震资料好得多。
In recent years there has been a rapid increase in the number of records, processes, and applications that describe vertical seismic profiles (VSPs), a technique that identifies multiples and compares the response to the formation throughout the depth of a lithological well, The improved estimation of the last reflection response at each depth of the total depth of the well and the estimation of the down-going waveform have been described in detail, although in many applications, the vertical seismic profile can supplement and improve the geology of the surface seismic data Explain the reliability, but the existing examples are minimal. Two specific examples will be described in this paper: One is an example of a prediction in the Far East that identifies it before it encounters a reef basement limestone. In this case, there is not a sufficient amount of ground-based seismic data to draw the target layer , The recorded vertical seismic profile data show a reliable marker for identifying basement limestone, although the base limestone is well below 4300 ft. Another is the North Sea example - improving the unconformity and unconformity In this example, the vertical seismic profile is recorded in a deviated well drilled through the target formation, resulting in a meaningful stratigraphic seismic profile. It may be much better than using seismic data recorded on the ground to distinguish the geologic target from the vertical seismic data.