A computer-implemented method for performing simulation of a field having a subterranean formation, comprising: obtaining a three-dimensional porous solid image of a core sample, wherein the core sample is a 3D porous medium representing a portion of the field; generating a digital rock model from the 3D porous solid image, wherein the digital rock model describes a physical pore structure in the 3D porous medium; obtaining phase behavior data of fluids of the field; generating a digital fluid model of the fluids based on the phase behavior data, wherein the digital fluid model describes a physical property of the fluid; performing, by a processor of a computer system and based on the digital rock model and the digital fluid model, a plurality of simulations of the field by varying an input parameter value for the plurality of simulations; and analyzing an output parameter generated by the plurality of simulations to determine an effect of varying the input parameter value on the output parameter; and characterized in that: the plurality of simulations simulates injecting fluid into the portion of the field and comprises: representing a plurality of sections of the portion of the field by a plurality of digital rock model instantiations; simulating a first section of the plurality of sections to generate a first effluent output, wherein the first section is simulated based at least on a first injection input and a first digital rock model instantiation of the plurality of digital rock model instantiations; simulating a second section of the plurality of sections to generate a second effluent output, wherein the second section is simulated based on the first effluent output and a second digital rock model instantiation of the plurality of digital rock model instantiations, wherein a value of the output parameter generated by the plurality of simulations is based at least on the first effluent output and the second effluent output; and outputting an intermediate or final result of the effect of varying the input parameter value on the output parameter for performing a field operation. obtaining a three-dimensional porous solid image of a core sample, wherein the core sample is a 3D porous medium representing a portion of the field; generating a digital rock model from the 3D porous solid image, wherein the digital rock model describes a physical pore structure in the 3D porous medium; obtaining phase behavior data of fluids of the field; generating a digital fluid model of the fluids based on the phase behavior data, wherein the digital fluid model describes a physical property of the fluid; performing, by a processor of a computer system and based on the digital rock model and the digital fluid model, a plurality of simulations of the field by varying an input parameter value for the plurality of simulations; and analyzing an output parameter generated by the plurality of simulations to determine an effect of varying the input parameter value on the output parameter; and characterized in that: the plurality of simulations simulates injecting fluid into the portion of the field and comprises: representing a plurality of sections of the portion of the field by a plurality of digital rock model instantiations; simulating a first section of the plurality of sections to generate a first effluent output, wherein the first section is simulated based at least on a first injection input and a first digital rock model instantiation of the plurality of digital rock model instantiations; simulating a second section of the plurality of sections to generate a second effluent output, wherein the second section is simulated based on the first effluent output and a second digital rock model instantiation of the plurality of digital rock model instantiations, wherein a value of the output parameter generated by the plurality of simulations is based at least on the first effluent output and the second effluent output; and outputting an intermediate or final result of the effect of varying the input parameter value on the output parameter for performing a field operation. representing a plurality of sections of the portion of the field by a plurality of digital rock model instantiations; simulating a first section of the plurality of sections to generate a first effluent output, wherein the first section is simulated based at least on a first injection input and a first digital rock model instantiation of the plurality of digital rock model instantiations; simulating a second section of the plurality of sections to generate a second effluent output, wherein the second section is simulated based on the first effluent output and a second digital rock model instantiation of the plurality of digital rock model instantiations, wherein a value of the output parameter generated by the plurality of simulations is based at least on the first effluent output and the second effluent output; and outputting an intermediate or final result of the effect of varying the input parameter value on the output parameter for performing a field operation.