Numerical analysis of the deformational behavior of hydrocarbon reservoirs based on an improved elastoplastic constitutive model

The goal of the current research is to make more comprehensive the elastoplastic stresses effects and oil reservoirs behave in solid phase. These stresses are largely caused by the behavior of subsurface fluid in reservoirs. In reservoir formations, there are frequently significant spatial changes at various length scales. Additionally, a number of physical events influence the flow model in various hierarchies. To fully describe the flow and deformation concerning all of these sizes, more computing power is required. One of the principal problems in the oil field business has always been how to describe, optimize, and simulate the behavior of the solid portion of oil reservoirs. To model fluid flow in reservoirs, deformable media, and porous media, more effectively, several scales must be taken into account. This approach is difficult in different scales, and the results of the simulation's speed, accuracy, and precision indicates this. A hybrid multi-physical multi-scale model has recently been developed as a solution to this problem. The goal of the current work is to update this model to represent solid-phase deformations better. For this improvement, the model is changed into a geomechanical model with the capacity to simulate a plastic region using an integrated yield function as well as using an implicit technique to solve convergence equations concurrently. The simulation outcomes demonstrate that the improved multi-scale mixed physical model is an effective model for modelling oil reservoirs with elastoplastic deformation. This model's calculation speed and accuracy have been tested, and the results are satisfactory. In addition, this paper modeled land subsidence, which Sokolova et al. claim is impacted by a lack of reservoirs, and it fits quite well with other studies. Results have demonstrated that plastic stresses affect both the rate of oil production and the behavior of subsidence. It can be included as a safety feature for infrastructure and oil surface plants.