柴达木盆地湖相混积岩储集层的孔隙空间计算方法

Porosity calculation method of lacustrine mixed rock in Qaidam Basin

储集层孔隙度是岩石物理基础参数评价的重要内容之一。柴达木盆地混积岩地层岩性复杂,矿物组分多变,导致孔隙空间计算精度受到限制。采用岩心刻度模型和理论模型结合,通过插值建立起混积岩地层的孔隙空间计算模型,可大幅度提高评价的精度和对复杂混积岩岩性的适应性,对混积岩储集层有效性评价起到了关键作用。

Porosity is an important basic parameter of petrophysics characteristics.In Qaidam Basin,the lithology of mixed rock stratum is complex,and the mineral composition is complex and changeable,,and the calculation accuracy of porosity is low.Combining core calibration model with theoretical model,,the Porosity calculation model of mixed rock formation is established by interpolation,which can greatly improve the accuracy of evaluation and adaptability to complex mixed rock lithology,and plays a key role in effective identification of mixed rock.