频谱成像技术在储层厚度预测中的应用

Application of spectral imaging technology in predicting reservoir thickness

基于薄层反射调谐原理的频谱成像技术,通过生成调谐能量体和一系列单频率的能量体,对储层厚度和储层横向变化进行有效描述。利用该技术对位于中国渤海辽东湾探区X构造东营组二段下段的一个典型岩性圈闭提取了振幅、频率等地震属性,目的层表现出强振幅、强调谐能量、低相对波阻抗、强高频吸收和衰减等含油气地球物理特征。利用频谱成像技术对X构造目标区油气层的空间展布进行了分析,定量预测了气层的厚度。后经钻井证实预测结果比较准确。

Spectral imaging technology based on thin bed reflecting tun- ing theory can effectively describe the lateral changes of sandstone and the thickness of reservoir by generating tuning energy volume and a series of single frequency energy volume.The technology was used to extract amplitude and frequency of a typical lithologic trap located in the lower second member of Dongying formation of X structure in Liaodong bay exploration area.The target layer dis- plays an obvious hydrocarbon bearing characteristics,such as strong amplitude,strong tuning energy,low relative wave imped- ance,strong attenuation and absorption of high frequency,etc. The technology was used to analyze the spatial attribution of target hydrocarbon zones of X structure and quantitatively predict the thickness of gas layer.The prediction results were proved accurate by the followed drilling information.