地震属性分析在清一段薄砂岩有利区预测中的应用

Application of Seismic Attribute Analysis in Prediction of Thin Sandstone Favorable Area in the First Member of the Qing Dynasty

区下白垩统清水河组一段油气显示活跃,其顶部发育一套砂泥互层薄砂岩,由上覆清二段大套杂色厚层泥岩作为盖层,具有良好的储盖组合,勘探潜力大。受地震资料分辨率的限制,砂体展布特征不明确,而地震属性在一定程度上有着比地震资料更高的分辨率,可应用于薄层砂岩的分布预测。因此,利用地震多属性分析技术对研究区目的层进行了薄砂岩分布及含油气性预测,有利于指导该区下一步的油气勘探工作。

The first member of Qingshuihe formation of Lower Cretaceous in the study area shows active oil and gas,with a set of thin sandstone interbedded with sand and mud developed at the top,and a large set of variegated thick mudstone overlying the second member of Qingshuihe formation as the cap rock,which has good reservoir cap rock combination and great exploration potential.Limited by the resolution of seismic data,the distribution characteristics of sand bodies are not clear,and seismic attributes have higher resolution than seismic data to a certain extent,which can be applied to the distribution prediction of thin sandstone.Therefore,using seismic multi-attribute analysis technology to predict the distribution of thin sandstone and hydrocarbon bearing property of the target layer in the study area is conducive to guiding the next step of oil and gas exploration in the area.