# Weight Assignment Method and Application of Key Parameters in Shale Gas Resource Evaluation
## 3 Key Parameter Weights
\begin{table}
\begin{tabular}{c c c} \hline \hline
**Method** & **Specific Methods** & **Direct Parameters** \\ \hline \multirow{5}{*}{Genesis method} & \multicolumn{1}{c}{Saturated residual hydrocarbon} & \multicolumn{1}{c}{Shale burial depth, hydrocarbon generation potential} \\  & method & index, thickness, area, density \\ \cline{2-3}  & \multicolumn{1}{c}{TOC method} & \multicolumn{1}{c}{\begin{tabular}{c} Shale thickness, area, density, TOC, \\ TOC recovery coefficient \\ \end{tabular} } \\ \cline{2-3}  & \multicolumn{1}{c}{Total hydrocarbon method} & \multicolumn{1}{c}{\begin{tabular}{c} Shale thickness, area, density, total hydrocarbon content, \\ kerogen content \\ \end{tabular} } \\ \cline{2-3}  & \multicolumn{1}{c}{Hydrocarbon production rate method} & \multicolumn{1}{c}{\begin{tabular}{c} Shale thickness, area, density, hydrocarbon production \\ rate, exhaust coefficient \\ \end{tabular} } \\ \hline \multirow{5}{*}{Analogy} & \multicolumn{1}{c}{Area abundance analogy method} & \multicolumn{1}{c}{\begin{tabular}{c} Shale area, abundance of standard area resources, \\ analogy coefficient \\ \end{tabular} } \\ \cline{2-3}  & \multicolumn{1}{c}{Gas content analogy method} & \multicolumn{1}{c}{\begin{tabular}{c} Shale area, standard area resource abundance, \\ analogy coefficient \\ \end{tabular} } \\ \cline{2-3}  & \multicolumn{1}{c}{EUR analogy method} & \multicolumn{1}{c}{\begin{tabular}{c} Shale area, EUR, analogy coefficient \\ \end{tabular} } \\ \hline \multirow{5}{*}{Statistical method} & \multicolumn{1}{c}{Volumetric method} & \multicolumn{1}{c}{\begin{tabular}{c} Shale area, thickness, density, gas content \\ \end{tabular} } \\ \cline{2-3}  & \multicolumn{1}{c}{Probability volume method} & \multicolumn{1}{c}{\
\begin{tabular}{c} Probability area, probability thickness, probability \\ density, and probability gas content of shale \\ \end{tabular} } \\ \cline{2-3}  & \multicolumn{1}{c}{Evaluation unit division method} & \multicolumn{1}{c}{
\begin{tabular}{c} Shale area, gas content, unit area, analogy coefficient \\ \end{tabular} } \\ \cline{2-3}  & \multicolumn{1}{c}{Delphi method} & \multicolumn{1}{c}{Multiple evaluation results, weight assignment} \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Parameters related to different resource evaluation methods. Therefore, it is important and necessary to assign weights and evaluate the geological parameters used for resource calculation and then determine the resource quantity. By analyzing the resource quantity and key parameters, it can be concluded that each method of calculating resource quantity involves multiple parameters, and the relationship between multiple parameters and resource quantity is the relationship between a set of random independent variables and a dependent variable. The weights of different key parameters in the calculation method are analyzed to explore the degree of correlation between different parameters and resource calculation results. The higher the correlation of parameters, the greater their weight in resource estimation, and the higher the accuracy of this parameter.