Shale gas is a kind of arisen unconventional gas resources. In current evaluation and study,there are no sys-tematic methods and criteria both at home and abroad.The shale bed rich in organic matter of Yanchang Formation of Ordos Basin is sampled and tested as a representative of lake facies shale, to discuss the evaluation criteria of lake facies shale gas reservoir,based on a series of monitoring for TOC, Ro, quantitative analysis of mineral components by x-ray diffraction, isothermal adsorption and BET surface area and pore distribution.With former study considered, the study defined the shale gas reservoir, naming that thickness, interlayer proportion、, TOC, Ro, brittle mineral content and poros-ity are the key factors to evaluate the reservoir. Finally, with the test result considered, an evaluation criteria is suggested, according to which the lake facies shale gas reservoir could be classified as good, normal and poor. The good reservoir should satisfied the following standards: thickness over 30m, TOC>2% and 1%展开▼
