ALGORITHM FOR SOLVING THE PROBLEM OF OIL FIELD HYDRO CONDUCTIVITY RECOVERY WITH INCOMPLETE PRODUCTION DATA

Abstract

A hydrodynamic model adjustment (an adaptation procedure) is applied prior to solving oil field development forecasting problems. The adaptation problem like any other inverse problem has more than one solution. Besides, the solution greatly depends on the production data quality and quantity being the foundation any analysis algorithms. In real applications there is a permanent lack of information. While water and oil flow rates are estimated frequently and with sufficient precision, downhole and reservoir pressure is not estimated as often as required. The paper proposes an algorithm for solving the adaptation problem. It provides sufficient accuracy for estimating the reservoir deliverability as the available production data are incomplete. Stabilizing functions are used for adjustment. They account for both physical and opinion-based constraints applied to the parameters adjusted.