Transitional shale gas, rich in resources, is expected to be a practical contributor the increase gas reserves and production China. Its exploration prospect has been demonstrated by several wells Daning-Jixian block on eastern margin of Ordos Basin. In this paper, Lower Permian Shanxi Formation (P1s) Taiyuan (P1t) Basin were compared for organic geochemical parameters, revealing that overflow ...

To date, the accurate prediction of tunnel boring machine (TBM) performance remains a considerable challenge owing to complex interactions between TBM and ground. Using evolutionary polynomial regression (EPR) random forest (RF), this study develops two novel models for performance. Both can predict penetration rate field index as outputs with four input parameters: uniaxial compressive strengt...