论文部分内容阅读
中基性火山岩的骨架密度变化较大,由于采用固定的骨架参数,直接应用威利公式计算得到的中基性火山岩储层的孔隙度往往存在较大的误差,难以满足储层评价的需求。本文提出了一种基于变骨架密度的中基性火山岩储层孔隙度评价方法。应用岩心分析及伽马能谱测井,采用多元线性回归的方法建立了中基性火山岩的骨架密度解释模型,在此基础上,结合密度测井及中子测井建立了变骨架密度的孔隙度测井解释模型,在松辽盆地庆深气田取得了良好的应用效果。
Because of the fixed skeleton parameters, the porosity of the medium-basic volcanic reservoirs calculated by the Willie formula is often large in error, which makes it difficult to meet the needs of reservoir evaluation. In this paper, a porosity evaluation method for medium-basic volcanic reservoirs based on variable framework density is proposed. Based on core analysis and gamma ray logging, the framework density interpretation model of medium-basic volcanic rocks was established by using multiple linear regression method. Based on this, a porosity-variable framework porosity was established by combining density logging and neutron logging The logging interpretation model has achieved good results in Qingshen gas field of Songliao Basin.