Shale gas is an important fossil energy substitute,while gas content is an important parameter for the evaluation of shale gas reservoir,and it is of great significance to evaluate the resources of shale gas and "sweet spot".In order to study the quantitative evaluation method of shale gas content,the shale gas reservoir of H block in Canada was taken as the study object,and the desorption gas,fugitive gas and residual gas stored in shale were determined by desorption of laboratory samples.The adsorption gas and free gas of shale are simulated by isothermal adsorption of CBM.Based on the analysis of the correlation between the logs and gas content,the logs corresponding to the key influencing parameters for gas content were screened,and the gas content evaluation model curve is established on the base of logs.Comparison between calculated results and measured results show that the evaluation model of shale gas content based on logging curve shows good practicability and accuracy in the application,which lays the foundation for the follow-up study of shale gas resources and the selection of "sweet spot".%页岩气是重要的化石能源替代品,含气量作为页岩气储层评价的重要参数,对于页岩气的资源评价与“甜点区”优选具有重要的意义.为了研究页岩含气量的定量评价方法,以加拿大H区块页岩气储层为研究对象,通过对取心样品的实验室解吸以测定页岩储存的解吸气、散逸气和残余气.借鉴煤层气的等温吸附模拟页岩的吸附气、游离气.以测定的含气量为基础,通过对测井资料与含气量的相关性分析,筛选含气量的关键影响参数所对应的测井曲线,建立基于测井曲线的含气量评价模型,通过对计算结果与实测结果的分析对比,表明基于测井曲线的页岩含气量评价模型在应用中表现出很好的实用性以及准确性,为后续的页岩气资源评价和“甜点区”优选奠定基础.
展开▼
