This formula also applies to the calculation of temperature distribution in dry gas well,wet gas well and condensate gas well and the calculation precision accords with the demands of engineering accuracy.

The Cullender Smith model firstly taken for computing gas well bottom hole pressure is widely used for calculating wellbore pressure in a dry gas well.

their economically recoverable reserves and economical recoveries are forecased by use of cash flow method and when the oil price is 1 220 $ per ton,the econmically recoverable reserves of predicted condensate and dry gas well be 1.14×10 6 t and 7.14×10 9m 3 respectively and the economical reveries of the condensate and dry gas will be 21.90% and 46.73% respectively;

During the production of condensate gas well,the formation is characterized with oil-gas multiphase seepage after retrograding,where deliverability equation for dry gas well isn't adapted to condensate gas well.

The well bore temperature distribution in condensate gas well is indispensable for the node analysis and performance analysis for gas well.Based on the heat transfer principle,the formula for calculating well bore temperature distribution in condensate gas well is presented,the method acquiring the basic data for the temperature calculation is discussed and the effect law of gas output,water output,well depth and tubing diameter on wellhead temperature is analyzed.The temperature in a certain condensate gas...

The well bore temperature distribution in condensate gas well is indispensable for the node analysis and performance analysis for gas well.Based on the heat transfer principle,the formula for calculating well bore temperature distribution in condensate gas well is presented,the method acquiring the basic data for the temperature calculation is discussed and the effect law of gas output,water output,well depth and tubing diameter on wellhead temperature is analyzed.The temperature in a certain condensate gas well with a depth of 5 400 m has been calculated.The gas oil ratio of this well is 3 000.The gas contains 2 3% H 2S and 4% N 2.The formation temperature is 134 ℃.Through calculation,it is shown that the relative error between the temperature measured at well head and that calculated is 0 2%～3 8%,being up to the engineering accuracy.The well temperature presents a nonlinear distribution with the depth and the well head temperature increases with the increase of the output and depth but decreases with the decrease of the tubing's diameter.This formula also applies to the calculation of temperature distribution in dry gas well,wet gas well and condensate gas well and the calculation precision accords with the demands of engineering accuracy.

Qianmiqiao buried hill with a total structural area of about 100 km 2 is at the uplifted side of Dazhangtuo fault in the northeast plunging end of North Dagang structural zone and is held between Dazhangtuo fault and Gangxi fault.Among the eight wells disposed,high oil and gas production has been obtained in wells Banshen-7 and 8 from Ordovician through production test.In the paper,the productivities of wells Banshen-7 and 8 condensate reservoirs are predicted according to the reservoir characteristics and...

Qianmiqiao buried hill with a total structural area of about 100 km 2 is at the uplifted side of Dazhangtuo fault in the northeast plunging end of North Dagang structural zone and is held between Dazhangtuo fault and Gangxi fault.Among the eight wells disposed,high oil and gas production has been obtained in wells Banshen-7 and 8 from Ordovician through production test.In the paper,the productivities of wells Banshen-7 and 8 condensate reservoirs are predicted according to the reservoir characteristics and structural research results of Qianmiqiao buried hill;their economically recoverable reserves and economical recoveries are forecased by use of cash flow method and when the oil price is 1 220 $ per ton,the econmically recoverable reserves of predicted condensate and dry gas well be 1.14×10 6 t and 7.14×10 9m 3 respectively and the economical reveries of the condensate and dry gas will be 21.90% and 46.73% respectively;risk assessment is carried out by applying the probability distribution method;three economically recoverable reserves,i.e.possible reserves,probable reserves and proved reserves,of condensate are estimated to be 1.199×10 6t,1.154×10 6t and 1.081×10 6t respectively and those of dry gas 7.52×10 9m 3,7.19×10 9m 3 and 6.66×10 9m 3 respectively;and finally the uncertainty factors are analyzed for the economically recoverable reserves.

The Cullender Smith model firstly taken for computing gas well bottom hole pressure is widely used for calculating wellbore pressure in a dry gas well.Through correcting the Cullender Smith method for water content,a new model of computing wellbore pressure in a gas well with high gas water ratio was set up by the authors.In the paper,on the basis of the energy equation of gas steady flow,the computing methods of such parameters involved in the derivation of model as the density,mass...

The Cullender Smith model firstly taken for computing gas well bottom hole pressure is widely used for calculating wellbore pressure in a dry gas well.Through correcting the Cullender Smith method for water content,a new model of computing wellbore pressure in a gas well with high gas water ratio was set up by the authors.In the paper,on the basis of the energy equation of gas steady flow,the computing methods of such parameters involved in the derivation of model as the density,mass flow rate,volumetric flow velocity and friction resistance coefficient of the fluids in a gas water well are discussed in detail by use of two phase flow theory;the applied formulae,tallying with legal measurement units,of calculating these parameters are put forward;then a corrected Cullender Smith model suitable for computing the wellbore pressure in a gas well with high gas water ratio may be obtained through substituting these formulae mentioned above into the energy equation of gas steady flow.A calculation example is introduced in the paper.Through contrasting the results of computing the flow pressures both at bottom hole and along wellbore by use of the conventional and corrected Cullender Smith models,it is shown that the corrected model is reliable.