中国石油勘探 ›› 2012, Vol. 17 ›› Issue (5): 32-35,70,82.

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应用测井数据计算泥页岩厚度——以鄂尔多斯盆地延长组长73油层为例

李薇,刘洛夫,王艳茹,张枝焕,陆骋   

  1. 中国石油大学(北京)油气资源与探测国家重点实验室;中国石油大学(北京)盆地与油藏研究中心
  • 出版日期:2012-10-15 发布日期:2012-10-15

Application of Logging Data in Calculating Mud Shale Thickness

Li Wei,Liu Luofu,Wang Yanru,Zhang Zhihuan and Lu Cheng   

  1. Li Wei1, 2, Liu Luofu1,2, Wang Yanru1,2, Zhang Zhihuan1, Lu Cheng1 1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249; 2. Basin and Reservoir Research Center, China University of Petroleum, Beijing 102249
  • Online:2012-10-15 Published:2012-10-15

摘要: 对烃源岩进行评价的一项基本工作就是对盆地泥页岩厚度进行合理估算。利用泥质颗粒能吸附放射性物质的特性,将自然伽马与泥质含量建立数学关系,计算结果中的泥质含量为一系列0~1的数据。在鄂尔多斯盆地选取了8口典型井,在单井的取心段读取泥页岩与非泥页岩的泥质含量的大小,根据这些统计数据确定识别泥页岩与非泥页岩的泥质含量界限为0.7。利用此界限,在该盆地三叠系延长组长73油层读取泥页岩厚度值,编制其平面分布图。通过与前人的研究成果对比,结果表明此方法可行且较准确,为进一步评价烃源岩奠定了基础。

关键词: 烃源岩, 泥质含量, 泥页岩厚度, 鄂尔多斯盆地

Abstract: One of the basic tasks for evaluating hydrocarbon source rocks is calculating mud shale thickness. According to the characteristics that the shale particles can absorb radioactive substances, a mathematical relationship is built between natural gamma and shale content. The calculated results showed that the values of shale content ranged from 0 to 1. Eight typical wells were selected in Ordos Basin. Mud shale and non-mud shale values were observed in core interval of single well to confirm the shale content boundary which could distinguish mud shale and non-mud shale and the boundary was 0.7. Using this boundary, the mud shale values were read in Chang73 oil layer of Triassic Yanchang Formation in Ordos Basin and the distribution map of mud shale thickness was drawn by comparison with the existing results. The results showed that this method was feasible and accurate and layed a foundation for further evaluation of source rocks.

Key words: hydrocarbon source rock, shale content, mud shale thickness, Ordos Basin