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Application of temperature transient analysis for welltest interpretation and well productivity evaluation
, Article Society of Petroleum Engineers - SPE Asia Pacific Oil and Gas Conference and Exhibition, Jakarta, Indonesia,October 30–November 1, 2007 ; 2007 ; 9781613990407 (ISBN) ; Siavoshi, J ; Sharif University of Technology
2007
Abstract
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 wellbore storage ends, wellbore temperature gradually cools down due to heat conduction with near wellbore region. This paper demonstrates a new technique for using temperature transient data in gas wells in order to determine end of wellbore storage. Also, effect...