【摘要】 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。更多还原

【Abstract】 Guangli-Qingnan area,including Guangli structure and Qingnan depression,locates in the east of Dongying depression.There are a lot of turbidite and beach-bar sand bodies in upper Es4.In Chunshang of upper Es4,1-3 sand groups are relatively thick with their proved reserves reported while 4-6 sand groups are too thin to be identified from the aspect of conventional seismic profile.By analyzing the seismic reflection characteristics of the target layers in this area,this paper adopted the spectrum decomposition technique based on the short time window DFT and transferred the target geological body from time domain to T/F 4D data volume with single frequency.The sand bodies in 4-6 sand groups are identified and predicted by choosing the proper data body,and the coincidence rate of prediction is high,marking the preliminary success in research area.更多还原