This paper discusses two novel findings. Firstly, 4D microgravity data are used to estimate density
changes for each reservoir layer using deconvolution technique supported by reservoir physical properties
and volume of fluid injection and production. Secondly, the density change values resulted from the
deconvolution technique are applied for 3D simulation of a reservoir fluid flow. In this study, the 3D
numerical approximation of two-phase incompressible and immiscible problems derived from fluid flow
formulation in conjunction with 4D microgravity formulation has been developed. The implication of gravity
effect in fluid flow has been quantified by the 4D microgravity method. In addition, a 3D gravity forward
modeling program has been created to test the value of density changes resulted from the deconvolution and
simulation techniques. For case study, 4D microgravity measurement data at ‘SS’ oil Field, Central Sumatra,
Indonesia, has been used. ‘SS’ oilfield is a multilayer sandstone reservoir and the depth of reservoir target is
approximately 700 m. The result has shown that application of the 4D microgravity data in fluid flows
monitoring and simulating gives a better interpretation of reservoir fluid flow dynamics.