Abstract
The average reservoir pressure is determined for reservoirs that have experienced some pressure depletion. In water-drive systems, the initial and average pressures are important. The average pressure as a function of time at the original water-oil contact may be used for past-performance matching and prediction. Several methods are available to estimate average reservoir pressure. In this chapter, a discussion is presented on the estimation of the boundary and average pressures using various techniques. This chapter treats to estimate original and average reservoir pressures using various techniques such as the Horner, MBH, MDH, Dietz, Ramey, and Muskat and Arps methods. This chapter also discusses determining constant pressure at aquifer in water-drive reservoir.
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