Rate Decline Curves Analysis of a Vertical Fractured Well With Fracture Face Damage

Rate decline analysis is a significant method for predicting well performance. Previous studies on rate decline analysis of fractured wells are all based on homogeneous reservoirs rather than homogeneous ones considering fracture face damage. In this article, a well model intercepted by a finite conductivity vertical fracture with fracture face damage is established to investigate how face damage factor affects the productivity of fractured well. Calculative results show that in transient flow, dimensionless rate decreases with the increase of fracture face damage and in pseudo steady-state flow, all curves under different face damage factors coincide with each other. Then, a new pseudo steady-state analytic formula and its validation are presented. Finally, new Blasingame type curves are established. It is shown that the existence of fracture damage would decrease the rate when time is relatively small, so fracture damage is an essential factor that we should consider for type curves analysis. Compared with traditional type curves, new type curves could solve the problem of both variable rate and variable pressure drop for fractured wells with fracture face damage factor. A gas reservoir example is performed to demonstrate the methodology of new type curves analysis and its validation for calculating important formation parameters. [DOI: 10.1115/1.4006865]

[1]  Hua-ping Xiao,et al.  A New Method for Prediction of Productivity Of Fractured Horizontal Wells Based On Non-Steady Flow , 2007 .

[2]  John M. Tinsley,et al.  Vertical Fracture Height-Its Effect on Steady-State Production Increase , 1969 .

[3]  Thomas Alwin Blasingame,et al.  Decline Curve Analysis for Variable Pressure Drop/Variable Flowrate Systems , 1991 .

[4]  M. J. Fetkovich.  Decline Curve Analysis Using Type Curves , 1980 .

[5]  J. J. Arps.  Analysis of Decline Curves , 1945 .

[6]  Rajagopal Raghavan,et al.  Well-Test Analysis for Vertically Fractured Wells , 1972 .

[7]  J. Hagoort,et al.  A simplified analytical method for estimating the productivity of a horizontal well producing at constant rate or constant pressure , 2009 .

[8]  Jpt staff,et al.  Analyzing Well Production Data Using Combined Type-Curve-and Decline-Curve-Analysis Concepts , 1998 .

[9]  H. Cinco-Ley,et al.  Evaluation of Fracture Asymmetry of Finite-Conductivity Fractured Wells , 1992 .

[10]  Irene A. Stegun,et al.  Handbook of Mathematical Functions. , 1966 .

[11]  J. P. Brill,et al.  Unified model for gas-liquid pipe flow via slug dynamics: Part 1: Model development , 2003 .

[12]  L. HeberCinco,et al.  Transient Pressure Behavior for a Well With a Finite-Conductivity Vertical Fracture , 1978 .

[13]  H. Cinco-Ley,et al.  Transient Pressure Analysis for Fractured Wells , 1981 .

[14]  G. W. Thomas,et al.  Vertical fracture height: effect on transient flow behavior , 1978 .

[15]  Jay Alan Rushing,et al.  Decline Curve Analysis Using Type Curves - Fractured Wells , 2003 .

[16]  Thomas Alwin Blasingame,et al.  Type-Curve Analysis Using the Pressure Integral Method , 1989 .

[17]  Lissett Barrios,et al.  Modeling Two Phase Flow Inside an Electrical Submersible Pump Stage , 2009 .

[18]  Xiaodong Wang,et al.  A Novel 3-D Model for the Water Cresting in Horizontal Wells , 2008 .

[19]  W. J. McGuire,et al.  The Effect of Vertical Fractures on Well Productivity , 1960 .

[20]  H. Cinco-Ley,et al.  Effect Of Wellbore Storage And Damage On The Transient Pressure Behavior Of Vertically Fractured Wells , 1977 .

[21]  M. Prats.  Effect of Vertical Fractures on Reservoir Behavior-Incompressible Fluid Case , 1961 .

[22]  R. J. Wilkens,et al.  Sensitivity of Slug Flow Mechanistic Models on Slug Length , 2011 .

[23]  Roland N. Horne,et al.  Analytic Solutions for Elliptical Finite-Conductivity Fractures , 1991 .

[24]  Deng-ke Tong,et al.  The Flow Analysis of Fiuids in Fractal Reservoir with the Fractional Derivative , 2006 .

[25]  H. J. Ramey,et al.  Applied Pressure Analysis for Fractured Wells , 1975 .

[26]  Ram G. Agarwal,et al.  Analyzing Well Production Data Using Combined-Type-Curve and Decline-Curve Analysis Concepts , 1999 .