A New Approach to Interference Test


By Noaman A.F. E1.Kitatib.


fninterference test am.lysis, tie semilog plotting techniques are inadequate because of the invalidity of the logarithmic approximation of the exponential integr3J function at large times.. Usually type-curve matching is used. Recently, analysis methods based on the pressure derivative, p , were imcduced. 1-3Tiab and Kumarl used the maximum value of p and @time at that point to estite the transmissivi~ and storativily of tie reservoir. Bourdet et af. 2 introduced type-curve matching rnetbcds that involve both pressuredrop” and pressurederivative matching. Clark and van Golf-Racht3 extended the pressure-derivative methods to variable-rate testing using a superposition time function;” In this work, a derivative method that yields a straight-line plot is introduced. More details can be found in Ref. 4.


  • 1.Tlab, D. and &“mar, A.: “Application of the PA Function to Interference Analysis,” JPT (Aug. 1930) 1465-70.
  • BoKr&q D. et aL: “A New Set of Tyw Cuwes Simplified Well Test Analysis,” World Oil (May 1983)95-1o6.
  • Clark, D.G. and van Golf- Racht,T.D.: Pressure-Derivative Approach to Transient Test Analysis A High Permeability North Sea Reservoir Example,, ‘ JPT (Nov. 19S5) 2023-29.
  • Wmatib, N. A. F.: A New Appmuh m fmerferenceTest A@aly$i$,zS paperSPE 13733 preiented at !he 19653PE MiddleFast OiJTechnical Conference,,Bahmin, March 11-14.,
  • Ramey,H.J. Jr., Kmnar,A., andGulati;M.S.: GusWellTesf4dysis UnderWatt-rDrive Cmdi!iom, AOA, ArIington,VA (1973) 1420.