复合属性在北堡地区东营组储层预测中的应用

Application of composite seismic attribute in prediction of reservoir of Dongying Formation in Beipu area

南堡凹陷北堡陆地东营组油气藏具有埋藏较深、储层薄、横向变化快的特点,表现为弱振幅、高频、连续性差的地震反射特征。前期研究表明单属性分析结果不能较好的反映储层展布特征,提出利用复合属性进行储层预测,并优选出振幅和频率属性进行取商运算,获得的最终成果应用于北堡陆地东营组河流相三角洲的储层预测,实钻结果表明该成果的钻井吻合率达80%。

The reservoirs of Dongying Formation are deeply buried, thin, and laterally changed rapidly in Beipu area, Nanpu depression. Reflection events are weak in amplitude, high in frequency, and poor in continuity. Previous studies showed that single attribute cannot reveal the characteristics of reservoir distribution. We proposed using composite seismic attribute to do reservoir prediction, and singled out amplitude and frequency to form a new composite attribute by their quotient. Using this new attribute, we predicted the reservoir distribution in the fluvial facies delta in Beipu area. The coincidence rate between the predictions and drilling result is as high as 80%.