【摘要】 为了更好地评价页岩气有机质丰度,在分析含有机质页岩的测并响应机理、特征及其影响因素的基础上,以四川盆地某页岩气工区多口井的页岩层有机碳含量计算为例,分析了自然伽马单因素计算模型、岩性密度测井单因素计算模型和声波电阻率多因素计算模型的优缺点,给出了自然伽马、声波时差和电阻率的多因素计算模型。计算结果表明,新提出的计算模型具有分析因素多、参数选择合理、计算结果稳定性好、精度高等特点,为国内其他页岩储层的总有机碳含量评价提供了思路和方法。更多还原

【Abstract】 In order to better evaluate the organic matter’ s abundance in the shale gas,on the bases of the analyses of the well logging responses,characteristics and their influencing factors for the matter-bearing shale,taking the history case of the TOC calculation in several shale gas wells of the operational site in Sichuan Basin as example,the merits and dismerits are analyzed for the individual factor calculating models of both natural gamma ray log and lithologic density logging and moreover the multi-factor calculating model of acoustic and resistivity loggings,finally the multi-factor calculating model of the natural gamma ray log,interval transit time and resistivity loggings is presented.From the viewpoints of the calculated results,the new established model is characterized by analyzing many factors,rational choosing parameters,much better stability of the calculated results,higher precision and so on,thus the thought and method are provided for the evaluation of the TOC contents in the other shale reservoirs in our country.更多还原