Development of an Improved Chemical Flooding model and Simulation Tool for Enhanced Oil Recovery
In the scope of this project, will be developed a new mathematical formulation of the basic equations of chemical compositional modeling and numerical simulation tool based on mathematical formulation using sequential method of solving. While chemical flooding in the petroleum industry has a larger scale of oil recovery efficiency than water flooding, it is far more technical, costly, and risky. Model studies can assist in this evaluation. Compositional reservoir simulation is used extensively in developed fields, where production forecasts are needed to help make investment decisions, identify opportunities to increase oil production, and make chemical flooding application successful. The displacement mechanisms in this type of flooding involve interfacial tension lowering, capillary desaturation, chemical synergetic effects, and mobility control, and its flow and transport model describes such physicochemical phenomena as dispersion, diffusion, adsorption, chemical reactions, and in-situ generation of surfactant from acidic crude oil. Special features in simulation software are needed to represent these processes. The reservoir simulation model is expected to be used by research institutes and oil companies in the development of new fields. Also, models can be used in developed fields where production forecasts are needed to help make investment decisions. It is expected that this code will be applied to calculation of Kashagan and/or other North Caspian field cases. This modeling tool of chemical flooding can also be used to solve problems of displacement of pollutants and remediation of aquifers by surfactants.
The Project purposes and objectives
It is the purpose of this projectto developa new approach for chemical compositional reservoir simulation, which may be regarded as a sequential method.
The main tasks of project: development of a new mathematical formulation of the mass conservation equations and pressure equation for the sequential chemical compositional simulation; a numerical discretization of the mathematical model based on a finite volume spatial discretization; numerical implementation of the newly developed mathematical formulation for the sequential chemical compositional reservoir simulation; development of a sequential, multiphase, multicomponent, compositionalsimulation tool (simulator) for chemical flooding; performance comparison of an improved chemical flooding simulator based on the new formulation with UTCHEM simulator for different physical problems and various case studies.
Keywords: Chemical com positional model, enhanced oil recovery, surfactants, polymer.