Loading...

A new method in well test interpretation using temperature transient analysis for gas wells

Bahrami, H ; Sharif University of Technology | 2007

471 Viewed
  1. Type of Document: Article
  2. DOI: 10.2523/11530-ms
  3. Publisher: Society of Petroleum Engineers , 2007
  4. Abstract:
  5. Interpretation of temperature logs has been done successfully in wells to identify water or gas entries location, detect casing leaks, and evaluate cement placement. This paper shows how knowledge of the Joule-Thomson cooling effect and frictional heating effect can be applied for well test interpretation. Many analysts rely on pressure derivative curve to diagnose wellbore storage period and radial flow regime on pressure transient data. However, there are field examples that flow regimes can't be accurately determined. During transient tests, both pressure and temperature are changed depending on downhole flow rate. In gas producing wells, Joule-Thomson cooling and frictional heating effects are the main dynamic factors causing flowing bottomhole temperature to differ from the static formation temperature at that depth. When a gas well is shut in, JT cooling effect is vanished and this causes a sharp increase in sandface temperature. As effect of WBS ends, wellbore temperature gradually cools down due to heat conduction with near wellbore region. This paper demonstrates a new technique for determining end of wellbore storage in pressure build-up tests for gas producing wells using temperature transient data. Application of this robust technique was demonstrated using three gas wells in which both temperature and pressure transient data were analyzed for more accurate welltest interpretation. Copyright 2007, International Petroleum Technology Conference
  6. Keywords:
  7. Boreholes ; Cooling ; Digital storage ; Friction ; Gases ; Gasoline ; Heat conduction ; Natural gas wells ; Oil field development ; Oil field equipment ; Oil wells ; Radial flow ; Thermal logging ; Well testing ; Bottom-hole temperatures ; Formation temperature ; Pressure and temperature ; Pressure transient data ; Temperature and pressures ; Temperature transient analysis ; Temperature transients ; Well test interpretation ; Transient analysis
  8. Source: International Petroleum Technology Conference 2007, IPTC 2007, Dubai, 4 December 2007 through 6 December 2007 ; Volume 2 , 2007 , Pages 1151-1160 ; 9781615673360 (ISBN)
  9. URL: https://onepetro.org/IPTCONF/proceedings-abstract/07IPTC/All-07IPTC/IPTC-11530-MS/30705