SOLUSI PERSAMAAN DIFUSIVITAS ALIRAN FLUIDA MINYAK PADA RESERVOIR DAN MODIFIKASINYA UNTUK UJI ALIR (PRESSURE DRAWDOWN TEST) DAN UJI TUTUP (PRESSURE BUILDUP TEST)

Abstract

Pressure transient of oil in reservoir can be obtained from the solution diffusivity equation. To find a solution of this diffusivity equation takes two boundary conditions as space dimension and one dimension of the initial state as a condition for the time dimension. The solution is determined by using the Laplace transform and then used as a test analysis of pressure drop in a flow test (Pressure Drawdown Test) and Pressure buildup Test. The  plot of the solution  used to prediction reservoir parameters such as permeability, skin faktor , volume of the reservoir, Dietz Shape faktor and the average pressure.

Keywords: diffusion equation, the pressure transient, the drawdown-buildup.