PNST脉冲中子全谱测井仪在冀东油田的新应用

Recent Application of PNST Pulsed Neutron Spectral Tool in Jidong Oilfield

至2017年底PNST脉冲中子全谱测井仪在冀东油田应用83井次,依据测井资料综合分析选层,措施后增油5. 17×104t。2017年之前,在冀东南堡油田PNST剩余油测井资料的措施符合率只有70%。南堡油田主力开发层系的砂岩储层富含钙质,针对性地研究与应用了PNST碳氧比测井解释的钙质校正方法。应用钙质校正方法后,PNST剩余油饱和度测井成果为南堡油田制订堵水、补孔方案提供了有效依据,90%以上的井措施后明显增油。测井实例表明,在冀东南堡油田PNST测井资料能够准确区分油水层和判断油层水淹程度。

By the end of 2017, the Pulsed Neutron Spectral Tool （PNST） has already been applied in 83 wells in Jidong oilfield. The measures based on the comprehensive analysis with its logging data have been taken, and the increase of the oil production by 5.17×10 4 t has been obtained. Before 2017, the efficient rate of the measures based on PNST logging interpretations of remaining oil in Jidong Nanpu oilfield was only 70%. The calcium correction method for interpreting the PNST C/O logging was studied and applied in Nanpu oilfield, where the large amount of calcium exists in its mainly developed sandstone reservoirs. After applying the correction method, the oil saturation interpretation results of PNST logging provided an effective basis for formulating measures of water shutoff and re-perforation for Nanpu oilfield, and oil production increased significantly in more than 90% wells following the measures. The field examples showed that the PNST logging data can accurately distinguish oil and water layers and determine water flooded degree of oil layer in Jidong Nanpu oilfield.