Parameters in an oil reservoir can be measured as maybe. There are direct measurements, and there is not direct. Measurements should be no direct based on a theoretical calculation, which is a good approach. In fact from the equation of continuity and flow dynamics flow, pressure in reservoir to meet equality diffusi. Oengan itself to get a good answer need to model the limit. Some of the models that match and is usually used in engineering and measurement field. But the model itself is still to be done now to approach the actual situation. Oisinilah fisisi can help develop. Lilik Hendradjaya; Departemen fisika - Institut Teknologi Bandung