In the recent years, much attention has been paid to unconventional reservoirs of hydrogen and carbon which are good sources of hydrogen energy. To ensure sufficient energy organic, the first step is understanding the properties of those unconventional reservoirs. The diagnostic fracture injection test (DFIT) is a very good technique to estimate the parameters of the unconventional reservoirs. Unfortunately, most DFIT models do not involve the complex fracture networks caused by natural fractures, fissures, and microfractures. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.