岩石物理弹性参数规律研究

根据辽东湾凹陷某区在地层条件和不同流体相态(气饱和、水饱和等)下岩石纵波速度、横波速度及密度等岩心测试数据,以及岩石矿物成分、孔隙度等常规岩心分析数据,统计分析了岩石弹性参数变化规律.采用有效流体模型、斑块饱和模型进行了纵、横波速度理论计算,并和实验测量结果比较,认为高孔、高渗岩石可以看作有效流体模型,低孔、低渗岩石更接近斑块饱和模型.这些规律和认识对于指导储层预测和油气检测及地震振幅综合解释有重要的意义.

The study on the relationships of elastic properties of rock physics

The relationships among elastic properties of rock physics have been discussed based on in situ measurement data with different pore fluid types and saturation in the area of LiaoDong Gulf,combined with clay content and porosity of rocks.Comparing measurement data with predicted data by effective-fluid model and patchy-saturated model,such as compressional and shear velocity,the results show that effective-fluid model is applicable to rocks with high porosity and high permeability well,while patchy-saturated model is more applicable to rocks with low porosity and low permeability.These conclusions are important to reservoir and pore fluid predictions from seismic data.