Hydraulic fracturing process (IMAGE) Energy Reviews Caption Hydraulic fracturing shifts the flow regime of unconventional reserves to transient linear flow, necessitating the use of straight line analysis technique for extracting fracture and reserve information. This study presents a comprehensive review of the advances in transient-flow oriented straight-line analysis. Credit US Environmental Protection Agency, Office of Research and Development, Washington DC Usage Restrictions No restrictions. License CC0 Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.