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广利-青南地区位于东营凹陷东部,包括广利构造及青南洼陷。沙四上时期广泛发育浊积岩和滩坝砂,沙四上的纯上1、2、3砂组较厚,已上报探明储量,而纯上4、5、6砂组砂体单个较薄,无法从常规地震剖面上来识别。通过分析该区目的层段地震反射特征,采用短时窗离散傅立叶变换的频谱分解技术,将目标地质体从时间域转换成单一频率的时频四维数据体,选取合适的数据体对沙四段纯上4、5、6砂组砂体进行了识别和预测,预测结果吻合率较高,并在研究区取得了初步成效。
Kwong Lee - the southern region is located in the eastern part of Dongying Depression, including the Kwang Lee structure and the South of depression. Turbidity and beach sand are widely developed in the fourth member of the Fourth Member of the Shahejie Formation. Thin, can not be identified from conventional seismic profiles. By analyzing the seismic reflection characteristics of the target layer in this area, the target geologic body is transformed from the time domain to a single-frequency time-frequency four-dimensional data body using the spectral decomposition technique of short-time window discrete Fourier transform. The pure sand bodies of 4,5 and 5 sand groups were identified and predicted. The results showed that the coincidence rate was high and the preliminary results were obtained in the study area.