地震属性与储层特征的相关性研究

Relativity between seismic attributes and reservoir characters

利用基于马尔科夫链理论的正演模拟方法生成的合成地震剖面 ,通过众多地震属性的提取 ,分析研究了地震属性与地质剖面中所包含的储层特征的相关性。研究结果表明 ,在利用地震属性研究具体的地质问题时 ,应该首先进行资料的品质评价。就资料品质的信噪比而言 ,信噪比低于 2时 ,原则上不能利用地震属性研究地质问题 ;信噪比为 2～ 4 (中等信噪比 )时 ,可以利用地震属性研究地质问题 ;信噪比大于 4时 ,利用地震属性研究地质问题时所提取的地震属性最稳定 ,所得结果的可靠性较高。当地层厚度、速度和密度以及构造形态在横向上都发生变化时 。

The relativity of the seismic attributes with reservoir characters was researched by utilizing synthetic seismic profile generated with simulation method based on the Markov Chain theory. The relativity between the seismic attributes and reservoir characters involved in the geologic profile was analyzed and investigated with picking-up of seismic multi-attributes.The calculation and analysis of theoretical model showed that the data have to be evaluated when the seismic attributes are used to research reservoir geology. The signal-to-noise ratio lower than two is unfavorable to the research of the seismic attributes.The signal-to-noise ratio ranged from two to four is favorable to do that. When the signal-to-noise ratio is over four, the seismic attributes are stable and reliable. When the thickness of strata, seismic velocity, density and structure pattern changed in the horizontal direction of reservoir, the related regulation between seismic attributes and reservoir characters would become bad.