基于气测录井的页岩气地层含气量计算方法

Gas logging calculation method for gas content of shale gas formations

页岩气地层含气量的高低是评价页岩气地层是否为有经济效益的可采页岩气储集层的一项重要指标。在规模开发页岩气过程中,当无法进行钻井取心时,利用岩心测定地层含气量的页岩气解析仪无法应用到钻井作业现场。在简介当前页岩气地层含气量测量计算方法的基础上,从气测录井气体检测分析过程入手,通过已知页岩气井的页岩气解析仪测定的地层含气量与相应层段的气测录井全烃含量之间的相关性分析,确定了依托钻井现场随钻气测录井技术,利用连续测定的全烃含量来计算页岩地层含气量,实现了及时快速地为页岩气井完井作业提供可靠决策依据的目的。

The gas content of shale gas formations is an important index to evaluate whether shale gas formations are recoverable shale gas reservoirs with economic benefits.In the process of scale development of shale gas,when drilling coring can not be performed,the shale gas analyzer using cores to determine the formation gas content can not be applied to the drilling operation site.Based on the brief introduction of the current measurement and calculation method of gas content in shale gas formations,starting with gas logging gas detection and analysis process,through the correlation analysis between the formation gas content measured by shale gas analyzer of known shale gas wells and the total hydrocarbon content measured by gas logging in corresponding intervals,it is determined to calculate the gas content in shale formations by the continuous determination of total hydrocarbon content based on the gas logging technology while drilling in the drilling site,the purpose of rapidly providing reliable decision basis for shale gas well completion practices is realized.