Numerical study of the effect of uneven proppant distribution between multiple fractures on shale gas well performance

A Multi-Parameter Optimization Model for the Evaluation of Shale Gas Recovery Enhancement

“…They are in reasonable ranges according to [2]. It is noted that this study did not investigate other parameters such as bottom-hole pressure, in-situ stress, and gas adsorption parameters, although these parameters are very important to gas production [2,39,40]. This optimization process indicated that the optimization room is relatively small, but sensitivity analysis reveals that matrix diffusion plays an incomparable role in gas production.…”

A fully coupled multiscale shale deformation-gas transport model for the evaluation of shale gas extraction

“…In recent years, experimental results indicate the effective permeability of the propped fractures decreases with the decrease of gas pressure [21,36]. Based on these experimental results, the relationship between the effective permeability and gas pressure can be written as…”

“…One is the Marcellus Shale case and the other is the Barnett Shale case. Specifically, the reservoir parameters of Marcellus Shale are based on the literature [21,37] as shown in Table 2. The reservoir parameters for Barnett Shale are obtained from the literature [20,38].…”

“…For the hydraulic fractures, a fracture flow model is applicable to describe the gas transport into the horizontal well. Experimental results indicate the effective permeability of the propped fractures decreases with the decrease of gas pressure [20,21].…”

CO2 injection for enhanced oil recovery in Bakken tight oil reservoirs

“…However, the primary oil recovery factor is very low due to the 36 extremely tight formation, resulting in substantial volumes of oil still remaining in place. Hence, it is 37 important to investigate the potential of applying enhanced oil recovery methods to increase oil recovery 38 in the Bakken formation. Although carbon dioxide (CO 2 ) is widely used in conventional reservoirs to 39 improve oil recovery, it is a new subject and not well-understood in unconventional oil reservoirs such 40 as the Bakken formation.…”