高分辨率地震勘探在宋站地区油气田发现中的应用

A DESCRIPTION OF DISCOVERY OF THE SONGZHAN OIL/GAS FIELD BY HIGH RESOLUTION SEISMIC SURVEY

在宋站地区油气勘探中,我们应用高分辨率地震观测方法进行野外数据采集,取得了高宽频带的原始记录。采用谱白化、反Q滤波等手段进行资料处理,获得了分辨率和信噪比均较高的时间剖面。我们根据高分辨率地震资料精细对比小断层,作油气顶面构造图,计算断层封堵量,研究圈闭的含油气性,进行碳氢检测和油气富集区的预测。使得勘探了二十多年未见工业油气流的宋站地区有了新的突破,展示了高分辨率地震应用的良好前景。

Over the recent twenty odd years,exploration was carried out all along in Songzhan region, but no commerical oil/ gas has been found in this area. By making data acquisition with high resolution seismic survey, the raw data with high frequency and broadband were thus obtained. The time section with high resolution and S/N ratio was obtained after the spectrum whitening and the inverse Q. filtering have been made. Based on the high resolution seismic data and the small faults obtained by careful correlation from modelling, the quasi-top -surface of the structure map of the reservoir could be mappedl the seal state of the reservoir trap in vcrficul direction could be determined by fault-closure calculation;the oil trap was determined by seismic modelling and the hydrocarbon detection as well as the prediction of the oil/ gas enriching area were determined by dint of the specialized processing for seismic data. By doing so, a break-through has been made in Songzhan district-a district in which more than 20 year's exploration has been made but no commerical oil gas was discovered. The above story shows a bright future for the application of the high resolution seismic survey.