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讨论了塔里木盆地阿北—顺北区块东部东河砂岩预测的方法。由于本区二维地震测网密度较稀,探井很少,且东河砂岩分布复杂,目的层埋藏较深,压实程度较大等地震地质特点,采用常规的波阻抗反演方法很难取得较好的预测效果。因此,本文采用了由波阻抗反演出发,运用频谱成像技术预测东河砂岩的空间展布位置,结合常规的波阻抗反演所得到的速度求取储层厚度,应力场分析预测储层的运移通道和储层的储集空间发育情况,以及地震反射振幅吸收衰减分析预测储层的含油气性等技术手段,对本区东河砂岩的发育、分布和含油气性进行预测、描述,取得了较好的效果。
The method of prediction of Donghe sandstones in the eastern part of Shunbei block in Tarim Basin was discussed. Because the density of two-dimensional seismic network in this area is scarce, exploration wells are few, and the distribution of Donghe sandstone is complicated, the burial depth of target layer is large and the degree of compaction is greater, it is very difficult to obtain by using the conventional wave impedance inversion method Better prediction effect. Therefore, in this paper, the inversion of wave impedance is used to predict the spatial distribution of Donghe sandstone by using spectral imaging technique. The thickness of reservoir is calculated by the velocity obtained from conventional wave impedance inversion. The development of reservoir space of migration channel and reservoir, and the absorption and decay analysis of seismic reflection amplitude to predict the hydrocarbon-bearing property of reservoirs. The development, distribution and hydrocarbon-bearing of Donghe sandstone in this area are predicted, described and obtained A better effect.