Temperature Test Theory Research

In the development of oil(gas) pool ,well test is one of important methods to evaluate oil(gas) pool and get parameter of reservoir .The data supplied by well test can mirror the dynamic vary case of reservoir .At present , the common used method of well test is pressure transient well test , Measure the dynamic information of formation pressure and production to perform the well test interpretation and reservoir evaluation .In actual work , temperature often be supposed as constant to participate interpretation , utilization rate is reduced . In addition , using pressure data can' t get monolayer production exactly in duallayer, multilayer testing . Through analyzing onsite data and researching the theory of temperature well test, we can use the variety of temperature in wellbore to calculate production and evaluate reservoir .Base on the conservation of energy .according Fourier' s law to establish thermal conduction equation of fluid in the pay formation , controlled equation of fluid flow in the tubing and relational formula of wellbore temperature and time in no pay formation and other related conditional equation , then find solution .Thus, can use the method of pay formation curve and the method of wellbore profile to perform thermodynamic evaluation and calculate production , moreover , using multilayer temperature well test data can calculate monolayer production .Because the condition is complicated in downhole, multiphase flow was unconsidered, only researched the single phase flow . During the verification of theory, because gas is more sensitive than liquid with temperature, select gas well data to verify the theory.This method surmount the supposition that temperature is constant in previous well test theory .According temperature to perform well test interpretation , improve the utilization rate and can supply new method and new thinking to solve problem that can' t get every monolayer production when multilayer testing .