岩石孔隙流体交会技术最新进展

Advances in crossplot techniques of pore fluid parameters

各种AVO属性反映的储层或含油特征具有很大的不确定性,在不同地区、不同层位,含油气砂岩的AVO属性千差万别。因此,应用AVO属性预测储层和描述油藏特征时,必须有足够的认识。提高AVO属性置信度,最常见的分析手段就是AVO交会图。在综合分析拉梅系数与密度的乘积(λρ-μρ)交会图和孔隙流体交会图的基础上,进一步补充和完善了孔隙流体交会图技术,使得利用AVO交会分析定量估算流体性质成为可能。基于孔隙流体交会,既可以运用交会的方法进行流体的定性识别,也可以利用其提取孔隙流体数据定量判识岩石中流体的性质。这一方法为AVO属性资料的精细解释提供了一条可行之路。

AVO attribute plays an important role in reservoir prediction and reservoir description. The oil-gas discrimination ability of AVO attribute varies greatly with exploration area or zone of interest. Great attention should be paid to the potential application risk of AVO attribute. Cross-plot of AVO attributes improves the confidence of AVO attribute. Here, the Lamba-density cross-plot and fluid cross-plot were introduced. Based on fluid cross-plot, estimation of pore fluid property can be carried out qualitatively and quantitatively.