多种地震属性分析技术在LD20-1构造区储层预测和含气性检测中的应用

基于岩石物理统计分析和地震资料保幅处理研究,在弄清研究目标储层岩性、物性、含油气性与地震响应特征关系的基础上,采用常规波阻抗反演、弹性波反演、多属性综合分析、吸收分析和AVO分析等多种地震属性分析技术,对LD201构造区4个有利目标进行了储层预测和含气性检测。结果表明,依据上述技术思路,可以实现多种预测结果的相互印证,降低单项地球物理勘探技术预测结果的多解性,从而提高该区有利目标储层预测和含气性检测的准确性;该区4个地质目标均处于浊积水道主体部位,其储层物性及储盖组合条件均较好,均为有利的含气目标。

An application of seismic attribute analysis techniques to reservoir prediction and gas detection in LD20-1 structure area

Based on petrophysical statistics and seismic amplitude preservation processing,we have first identified the relationships between reservoir lithology,physical property and hydrocarbon characteristics and seismic responses of the target intervals.Then several techniques of seismic analysis,such as traditional impedance inversion,elastic wave inversion,multi-attribute analysis,Absorption analysis and AVO analysis,and their combinations can be applied to predict reservoir and detect gas potential for four favorable prospects in LD20-1 area.The results indicate that the mutual confirmations among multiple predictions can eliminate the multi-solutions from single geophysical techniques and improve reservoir prediction and hydrocarbon detection.The four prospects in LD20-1 area,all located in the main part of turbidite channels,have favorable gas potential because of better reservoir petrophysics and reservoir-seal assemblages.