地震拓频处理技术在歧口深层气藏储层预测中的应用  

The Application of Seismic Frequency Expanding Processing Technique to Deep Gas Reservoir Prediction in Qikou

作　　者：周宗良[1] 吴刚[1] 肖建玲[1] 张凡磊[1] 

机构地区：[1]中石油大港油田公司勘探开发研究院,天津大港300280

出　　处：《工程地球物理学报》2015年第5期604-609,共6页Chinese Journal of Engineering Geophysics

摘　　要：歧口主要含气层滨Ⅲ、滨Ⅳ油组为两套砂泥互层段,属扇三角洲砂体,具有低孔、低渗、非均质性强、预测难的特点。运用地震拓频处理技术,通过对歧口深层气藏地震资料进行提高分辨率的拓频处理,大大增强了地震高频弱信号的能量强度,深层目的层沙河街组油组含气层段频率从10~30 Hz拓宽到10~60 Hz,提高了地震资料识别薄层储层的能力;同时,通过应用拓频处理后的地震资料,以岐口深层为目标进行了储层反演与属性储层预测,取得了明显的效果,准确刻画出了研究区扇三角洲前缘砂体等岩性气藏边界,实现了深层气藏储层的三维精细预测,应用效果较好。There are mainly bnⅢ, bnⅣ formations in Qikou gas reservoir which belongs to sand mud interbed section with fan delta sandstones. With the characteristics of low porosity, low permeability, strong heterogeneity, and difficult prediction, this paper, which applies seismic frequency expanding processing technique, greatly enhances the energy intensity of high frequency weak seismic signal through the expanding resolution of seismic data of Qikou deep gas reservoir. So, the ability to identify thin reservoir by seismic data is improved, which makes gas bearing layer frequency of deep purpose layer Es formation expand from 10-30 Hz to 10-60 Hz. By applying expanded seismic data, Qikou deep reservoir is inversed and predicted, and the obtained effects are obviously good. The lithologic gas reservoir boundary of front sandstone in fan delta, etc. is accurately depicted, and three-dimensional fine prediction of deep gas reservoir is achieved.

关 键 词：拓频处理 歧口深层 储层预测 地震属性 

分 类 号：P631.4[天文地球—地质矿产勘探]