Modified Hyperbolic DCA (‘M-Hyp-DCA’) is the most widely used method in oil and gas production forecasting. The main goal of production forecasting is to get the EUR, which is highly sensitive to parameters used in forecasting. The table below lists the parameters used in M-Hyp-DCA: To understand “EUR sensitivity” in response to the…Continue Reading “What Is The Most Important Parameter in Calculating EUR?”

Many reservoir engineers are asking me what b-factor we should use to forecast wells?! Well, the short answer is “it depends”! b-factor is the derivative of 1/D (D=Nominal Decline) with respect to time and has no dimension. In early times, one could fit a set of production data with almost any value of b,…Continue Reading “How does b-factor change with completion and well spacing?”