碎屑岩储层的密度地层因素公式及在ZR油田的应用

A density formation factor formula of fragmental reservoir and its application in ZR oilfield.

密度测井响应值(ρ)不仅与储层的岩性、孔隙度(φ)及孔隙中流体的密度(ρf)有关,还取决于储层孔隙结构。通过引进参数m、a(它们能够反映储层孔隙结构和孔隙中流体密度的变化)建立的密度地层因素公式,不仅能够满足实际计算储层孔隙度的精度要求,保证计算结果的可靠性和准确性,而且能够更客观、合理地描述储层的ρ-φ关系。

The formation density(ρ)obtained with density logging is not only related to the lithology of reservoirs,porosity (φ),fluid density(ρf)in pore,but also depends on pore structure of reservoir.By introducing the parameter(m,a), which can reflect the change of pore structure and fluid density of reservoir,a density formation factor formula of fragmental reservoir is established.It not only ensures the reliability and accuracy of computing porosity,but also is able to depict the relation betweenρandφmore objectively and reasonably.