页岩有机质特性参数测井计算方法及适用性分析

LOGGING CALCULATION METHOD AND APPLICABILITY OF THE SHALE ORGANIC MATTER PARAMETERS

页岩气储层矿物组成分复杂,富含有机质。测井解释评价主要是针对页岩极低孔低渗,具有很强的非均质性和各向异性的特点,对反映页岩特征的有机碳含量、热成熟度指数、含气量、脆性指数等关键参数的计算方法及适用性进行研究,总结不同页岩地层特点的影响因素及适用条件,形成页岩气储层综合评价方法。绘制的页岩解释处理软件,处理结果和岩屑、岩心分析对比结果一致性较好。主要参数定量评价成果为试气层段优选,压裂方案制定,资源评估等后期勘探开发方面的工作提供技术支撑。

Shale gas reservoir has complex mineral components and rich in organic matter.Logging interpretation evaluation is to calculate some key parameters which reflect shale features such as organic carbon content, thermal maturity exponent, gas content, brittleness index,etc., to study the applicability according to the characteristics of extremely low porosity, low permeability, strong heterogeneity and anisotropy of shale, and to summarize the influence factors of different shale formation and applicable conditions of forming shale gas reservoir then to form the comprehensive evaluation method.The processed results drawn by the interpretation software are consistent with the results of cuttings and core analysis.Quantitative evaluation results of the main parameter provide technical support for optimal selection of gas testing zones, fracturing scheme, resources evaluation and late exploration and development.