جستجوی مقالات مرتبط با کلیدواژه « مخازن شکافدار » در نشریات گروه « مکانیک »

In this work, a reliable mathematical model for numerical modeling of co-current and counter-current spontaneous imbibition in 1D and 2D modes is presented using MATLAB software and validated. Then, several studies are conducted on the effect of boundary conditions on the imbibition process. Results show that the oil recovery in co-current imbibition was 1.5 times greater than counter-current imbibition after 20 days. The results also show that in blocks with different heights, oil recovery is different. Investigation of the counter-current spontaneous imbibition in 2D mode in a large matrix block fully immersed in water indicated the effect of the gravity force in doubling the oil recovery after 120 days. Moreover, reducing the matrix block-water contact results in a decrease in the performance of imbibition process in the oil production so that the amount of the counter-current imbibition oil recovery decreased from 49% (four faces in contact with water) to 30% (one face in contact with water) after 10 days. The results show the increase of the water-contacted boundaries improves the spontaneous imbibition process efficiency.

Renewable energy is defined as sort of energy whose producing resources possess the capability to renew through nature during a short period of time. The analytical model of water injection into geothermal reservoirs process which is used to describe more complex matters, can explain the heat transfer processes in the porous media better. The presented corresponding studies so far are based on numerical and semi-analytical methods while here, a fully exact analytical solution is introduced considering phenomena of convection, conduction and dispersion inside fractures, conduction inside matrix blocks, and matrix-fracture heat transfer. In this regard, geothermal fractured reservoir related heat transfer equations are solved, ignoring fracture dispersion and heat conduction phenomena, which appears to be an appropriate assumption in high injection velocity values and then the effects of injection water velocity and distance from injection well parameters on the amount of error percent of these two models are investigated. Moreover, thermal recovery efficiency is employed to investigate cold water flooding into such reservoirs followed by a comparison to a numerical model for the purpose of validation.