石油学报 ›› 1992, Vol. 13 ›› Issue (4): 31-40.DOI: 10.7623/syxb199204004

• 地质勘探 • 上一篇    下一篇

中子和密度测井找气的一种特殊解释方法

谭廷栋   

  1. 石油勘探开发科学研究院 北京
  • 收稿日期:1991-01-09 出版日期:1992-10-25 发布日期:2013-07-08
  • 作者简介:谭廷栋,1933年生.1952年毕业于川北大学电机系.现任中国石油天然气总公司石油勘探开发研究院教授级高级工程师.通讯处:北京,学院路18号910信箱,邮政编码:100083.

A SPECIAL INTERPRETATION METHOD FOR GAS FINDING BY NEUTRON AND DENSITY LOG

Tang Tingdong   

  1. Research Institute of Petroleum Exploration and Development Beijing
  • Received:1991-01-09 Online:1992-10-25 Published:2013-07-08

摘要: 针对钙泥质砂岩气层孔隙度低和岩性复杂的地质特点,提出一种中子和密度测井找气的特殊解释方法,排除了岩性变化引起的多解性;引入气层中子和密度孔隙度下限值概念,提高了中子和密度测井找气的直观性。同时,又引入气层含水饱和度下限值作验证,提高了中子和密度测井找气的准确性。应用效果表明,该法对解释钙泥质砂岩气层有良好的效果。

关键词: 测井找气, 中子孔隙度, 密度孔隙度, 测井解释, 钙泥质砂岩气层

Abstract: A special interpretation method suggested in this paper can indicate calcitic shaly sand gas formation which has the characteristics of low porosity and complex lithology and can eliminate multi-solution in log interpretation.The concept of gas-bearing formation cut-off value and the way to identify gas zones by the water saturation cut-off value in gas-bearing formation improve the efficiency and accuracy of gas finding by acombination of neutron and density log.ctual examples show that the result is satisfactory.