WebDecline curve analysis is essentially a curve fitting, or trend-line, analysis procedure where the form of the trend-line is developed from Arps [1] observations (Equation 4.68 and Equation 4.69). In this procedure, once the form of the trend-lines is established, we can use the parameters, q o i , D i ,and b to best match the data. Based on what has been covered so far, the engineer performing a DCA analysis needs to be aware of the following: 1. The most representative period in history that will also represent future. 2. The decline trend during that period. 3. The start point(rate) of forecast . 4. The constraints under which the … See more The technique is not necessarily grounded in fundamental theory but is based on empirical observation of production decline. Three types … See more J.J. Arpscollected these ideas into a comprehensive set of equations defining the exponential, hyperbolic and harmonic declines. His work was further extended by other … See more The basic assumption in this procedure is that whatever causes controlled the trend of a curve in the past will continue to govern its trend in … See more The major application of DCA in the industry today is still based on equations and curves described by Arps. Arps applied the equation … See more
Production Decline Curve Analysis - Energy Information …
WebDecline curve analysis is a means of predicting future oil well or gas well production based on past production history. Production decline curve analysis is a traditional means of identifying well production problems and predicting well performance and life based on measured oil well production. [1] [2] Before the availability of computers ... WebWhen using any of the decline equations, one must make sure that the time used in the equation matches the decline rate time frame. If one uses yearly decline rates, then the time used in the equation must be in years. If monthly decline rates are used, the time used in the equation must be months. All decline rates used in the equations are ... libya tour packages
Decline Analysis Curve - an overview ScienceDirect Topics
WebThe decline rate is used to work out the ultimate produced fluid under hyperbolic decline case. Initial flow rate and the flow rate at the time of abandonment are predicted as (2.15) (2.16) When t0 = tf and t = tab, the cumulative production Qf of the forecast period can be derived from Eq. (2.12) (2.17) WebDecline curve analysis- Decline type determination- Decline rate calculation- Forecasting WebThe basic two plots for harmonic decline-curve analysis are based on these two relationships. Equation 16-14 indicates that a plot of 1/q t versus t on a Cartesian scale will yield a straight line with a slope of (D i /q i) and an intercept of 1/q i.Equation 16-15 suggests a plot of q t versus G p(t) on a semi-log scale and will yield a straight line with a … libya track