基山砂岩体与盐家砂砾岩体储层特征分析与测井评价

Analyses and log evaluation on Jishan sandstone body and Yanjia sandstone-conglomerate reservoir

通过对比低渗透基山砂岩体与盐家砂砾岩体岩性、物性、孔隙结构特征,揭示两地区储层在孔、渗关系、产能、油干层界限等方面不同的原因。针对两地区不同的储层特征,优选计算两地区储层孔隙度和渗透率的测井项目,给出了计算模型;生产科研实践显示,核磁共振测井在计算两地区的储层参数时具有很好的适用性,但深层渗透率计算仍需进一步研究。储层有效性测井评价是低渗透油藏的重点和难点,基山砂岩体利用常规测井资料结合核磁共振测井可以较好地评价储层的有效性,盐家砂砾岩体利用常规测井结合FMI成像、核磁共振测井资料可以更好地评价储层的有效性。

Jishan sandstone body in Huimin depression and deep sandstone body of north Yanjia in Dongying depression are the key exploration blocks of Shengli oil field in recent years.Two blocks are typically of low permeability or ultra-low permeability reservoir.But significant differences exist in the reservoirs of these two areas in lithology,physical property,oil dry boundries,as well as reservoir capacity and many other aspects.They also make significant differences in the logging evaluation of these two different types of reservoirs.In this paper,comparative analyses about reservoir lithology,physical property pore structure characteristics of this two types of reservoirs are made and on the basis of which,the reasons for the differences between the tow regions are revealed,and the appropriate logging projects and method are proposed.