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。
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.
出处
《石油学报》
EI
CAS
CSCD
北大核心
1992年第4期31-40,共10页
Acta Petrolei Sinica
