利用时频分析技术预测依拉克构造有利砂体分布

发布时间：2018-03-11 15:32

本文选题：时频分析　切入点：砂体预测　出处：《石油地球物理勘探》2017年03期 　论文类型：期刊论文

【摘要】：依拉克构造白垩系舒善河组属多物源的扇三角洲沉积体系,其砂体变化快、储层非均质性强,有利砂体难以预测。本文采用时频分析法,即首先通过S变换将时间域地震信号转换到频率域,并基于精细时深标定,优选能识别出目标层段分流河道砂体的优势频率体;再依托优势频率(40Hz)数据体,综合应用相干、瞬时振幅等多属性分析技术,预测有利相带的分布;在该有利相带约束下,利用三维砂体雕刻技术识别出(6个)有利砂体,清晰刻画了砂体的规模和展布特征。根据预测结果,选择在2号砂体上布设探井,实钻后获得高产油气流,表明预测结果与实钻结果很好吻合。
[Abstract]:The Shushanhe formation of the Cretaceous system of Yilake structure is a fan delta sedimentary system with many provenances. The sand body changes rapidly, the reservoir heterogeneity is strong, and the favorable sand body is difficult to predict. That is to say, the seismic signal in time domain is converted to frequency domain by S transform, and based on fine time depth calibration, the dominant frequency body of distributary channel sand body in target layer can be identified by optimal selection, and then, relying on the dominant frequency data body, 40 Hz data body can be synthetically applied coherently. In order to predict the distribution of favorable facies belt, six (6) favorable sand bodies are identified by 3D sand body engraving technique, and the size and distribution characteristics of sand body are clearly described, according to the predicted results, the distribution of favorable facies belt is predicted by instantaneous amplitude and other multi-attribute analysis techniques, and the three dimensional sand body engraving technique is used to identify (6) favorable sand bodies. The high oil flow was obtained by setting the exploration well on the No. 2 sand body, which shows that the prediction results are in good agreement with the real drilling results.
【作者单位】：中国石油勘探开发研究院;中国石油勘探开发研究院廊坊分院;
【基金】：国家科技重大专项“大气田富集规律与勘探关键技术”(2016ZX05007)资助
【分类号】：P618.13

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