Differentiation and Prediction of Shale Gas Production in Horizontal Wells: A Case Study of the Weiyuan Shale Gas Field, China

The estimated ultimate recovery (EUR) of shale gas is an important index for evaluating the production capacity horizontal wells. Weiyuan field has wells with considerable EUR differentiation, which hinders prediction new Accordingly, 121 highly differentiated are used analysis. First, main control factors well identified via single-factor and multi-factor analyses, set as index. Subsequently, key selected to perform multiple linear regression EUR, accompanied by developed method prediction. thickness drilled length Long 111 (Substratum 1 submember, Lower Silurian Longmaxi Formation) demonstrated have uttermost effects on production, while several other also play roles, including fractured wellbore length, saturation, brittle mineral content, fracturing stage quantity, proppant injection intensity. can help accurately predict errors no more than 10%, in that smooth curves free artificial interference, such casing deformation, frac hit, sudden change schemes. results this study expected provide certain guiding significances development.