... curve analysis in two ways: 1) inefficient estimation of decline curve parameters, and 2) lost signal in the data. Borrowing from time series statistics, there are two conventional ways of dealing with these potential problems: 1) estimate the decline curve parameters with generalized least squares...

... Abstract Estimating ultimate recovery (EUR) in shale is a function of rock properties, well, and completion design parameters. The variation associated with these parameters are in source of uncertainty. In this paper the combined decline curve (CDC) approach is used to estimate the EUR...

... Abstract The long-term production behavior of horizontal wells producing from Marcellus shale due to limited production history has not been well established. As a result a simple method for predicting the long-term production and reserves would be of interest. Several production decline curve...

... are not subject to many of the assumptions imposed in the development of the Arps equation, these models are much more versatile than decline curves derived using the Arps modified hyperbolic equation. In this paper, we present a practical workflow for performing RTA to determine the key performance parameters...

... and productivity. Completion Installation and Operations decline curve compressive strength comparative assessment Upstream Oil & Gas flow performance post shot decline curve hole size pressure drop entrance psi overbalance 1200 1000 800 spe 125752 shot decline curve reactive charge...

... database, we have used traditional waterflood and reservoir surveillance tools to compare oil reservoir responses in 3 Mississippian Reservoirs. The primary means for making comparisons between waterflooded units is the recovery plot and the recovery derivative. Representative decline curves and oil...

... irregularities. The second technique uses linear regression for fitting a decline curve to data. The method weights equally the production rates during curve fitting, resulting in a stable solution. Consequently, the results are reproducible for a wide range of applications. Both methods were tested against...

... boundary wells. The paper outlines the criteria for placing these wells to create the effects of the boundary. This semi-analytical method permits us to study rate declines in cases that cannot be studied analytically. reservoir artificial intelligence aad rate equation decline curve boundary...

... ABSTRACT A family of pressure and production decline curves are generated for wet-gas sands with closed outer boundaries. Wet-gas sands are characterized as gas reservoirs which produce substantial amounts of water together with gas. Production of water introduces complications when practicing...

... consideration. An alternative to material balance methods, after some production has taken place, is the popular decline curve analysis, where production rate is plotted against time or, occasionally, against cumulative production. Decline curves require only the bare essentials of data, namely a record...

... monitoring microcomputer evaluation production control society of petroleum engineers operation production rate economic limit decline curve economic optimization upstream oil & gas artificial intelligence production limit decline curve analysis reservoir surveillance procedure...

..., the developed type curves were verified using actual production data obtained from the gas wells in the Appalachian Basin. reserves evaluation production control pseudo-steady-state condition fetkovich type curve decline curve application spe 15933 analytical model gas well calculation reservoir...

... have been developed to determine the gas content of a coal seam based primarily on the analysis of exploratory cores. Such methods generally yield quite different results when applied to the same core sample. A new technique which relies upon the analysis of decline curves constructed from gas...

... Abstract Decline curves (production vs time) were drawn and evaluated in an effort to determine the results of restimulation work performed in the Silurian Clinton Sand Formation, east central Ohio area. A total of seventy-one oil wells were hydraulically fractured between 1972 and 1975...

... Spudders. Fluid Dynamics drilling operation management pennsylvania shallow production Upstream Oil & Gas flow in porous media completion History natural gas MCF recoverable reserve western pennsylvania contractor economics gas well decline curve field price operator spe 5446...