prosper step by step

7/23/2019 Prosper Step by Step

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Prosper Well Modeling

Step by Step Guide to Build & Match a Prosper Model of a Gas Lifted Oil Well

Starting a New Well File

Open Prosper !f a well "odel is loaded # Fro" the Main Menu Bar # press File$New

Options

%lic Options$Options 't the 'rti(cial Lift ) Method Pull *own Menu select Gas Lift !n the +ype Pull *own Menu chec that No Friction Loss in 'nnulus is selected !f the well is onshore ) select %alculation +ype ) Predict Pressure and +e"perature,Onshore- !f the well has an open hole co"pletion ) select Well %o"pletion # +ype Open .ole 'ccept all other default Settings Press *one

P/+

Fro" the Main Menu Bar ) Press P/+$!nput *ata 0nter Solution GO1 0nter Oil Gra2ity 0nter Gas Gra2ity 0nter Water Salinity Press Match *ata 0nter +e"perature of P/+ Match *ata 0nter Bubble Point at this +e"perature 0nter Pressure3 Gas Oil 1atio3 Oil For"ation /olu"e Factor3 and Oil /iscosity for eachP/+ *ata Point a2ailable

Press *one Press 1egression Press Match 'll When the %alculation stops ) Press O4 Press Para"eters %hose the Blac Oil Model for Bubble Point3 Solution GO13 and Oil For"ation /olu"eFactor that has5o Para"eter 6 closest to 6o Para"eter 7 within 8 or ) 6999o Lowest Standard *e2iation %hose the Blac Oil Model for Oil /iscosity that has5o Para"eter 6 closest to 6o Para"eter 7 within 8 or ) 6999

o Lowest Standard *e2iation Press *one Select the choice of Blac Oil Models in the %orrelations pull down "enu at the rightof the screen Press Plot Press /ariables at the top of the screen Select Pressure as the : a;is /ariable Select GO1 as the < a;is /ariable Press *one !f the crosses ) the data entered in the Match *ata screen ) do not lie on the line


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calculated by Prosper ) %hose another Blac Oil %orrelation Press /ariables at the top of the screen Select Oil F/F as the < a;is /ariable Press *one !f the crosses ) the data entered in the Match *ata screen ) do not lie on the linecalculated by Prosper ) %hose another Blac Oil %orrelation Press /ariables at the top of the screen Select Oil /iscosity as the < a;is /ariable Press *one !f the crosses ) the data entered in the Match *ata screen ) do not lie on the linecalculated by Prosper ) %hose another Blac Oil %orrelation Press Finish Press *one Select the choice of Blac Oil Models in the %orrelations pull down "enu at the rightof the screen Press *one

*ata 1e=uired for /ertical Lift %alculations

Press Syste"$0=uip"ent ,+ubing etc- Press 'll Press 0dit 0nter *e2iation Sur2ey *ata Press *one 0nter +e"perature of Surroundings at Wellhead at the botto" right of the screen 0nter > B+?$h$ft7$*eg F for O2erall .eat +ransfer %oe@cient Press *one 0nter %o"pletion *etails fro" the %o"pletion *iagra" in *ownhole 0=uip"ento Press in the +ype %olu"n to enter a tubing or SSS/o +he depth entered should be at the botto" of each tubing section with a diAerentinternal dia"etero +he depth should be referenced to a datu" that is ne2er changed ) usually 1otary

+able

o ?se 1estriction for e=uip"ent such as Nippleso !f the tubing or casing is "ade of Stainless Steel enter 9999CD for 1oughnesso ,*o not change 1ate Multiplier ) it "ust be 6-o 0nter %asing down to the depth of the "iddle of the perforations Press *one 0nter the depth of the wellhead referenced to datu" and en2iron"ental te"peratureat the wellhead in Geother"al Gradient 0nter the botto" depth of the co"pletion entered in *ownhole 0=uip"ent and thereser2oir te"peratureo !f there is data a2ailable on the te"perature at the botto" of the sea and the seawater depth enter this between the wellhead and the botto" of the co"pletion 0nter a O2erall .eat +ransfer %oe@cient of > B+?$h$ft7$*eg F ) unless you now the2alue for the well

Press *one *o not change the default 2alues for '2erage .eat %apacitieso !f you thin these ha2e been changed ) Press *efault Press *one Press *one

*ata 1e=uired for !nEow Perfor"ance 1elationship ,!P1-

Press Syste"$!nEow Perfor"ance


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!f P! 0ntry is not selected ) Press P! 0ntry 0nter 1eser2oir Pressure 0nter 1eser2oir +e"perature 0nter Water %ut fro" the last well test 0nter the +otal Gas Oil 1atio ,GO1- being produced fro" the 1eser2oir Press !nput *ata at the top right of the screen 0nter an esti"ate for the P! of the wello +his does not ha2e to be accurate ) howe2er3 if you now an appro;i"ate 2alue use it Press %alculate ) Prosper will calculate the !P1 cur2e Press Finish ) at the top left of the screen Press *one

*ata 1e=uired for Gas Lift 'nalysis

Press Syste"$Gas Lift *ata 0nter Gas Lift Gra2ity Select Fi;ed *epth of !nection 0nter the *epth of the Gas Lift Ori(ce in Gaslift /al2e *epth ,Measured-o !f there is a gas lift sur2ey ) 0nter the *epth that the Lift Gas is !necting at Mae sure that the GL1 !nected is 9 Press *one

Matching Prosper to a Well +est

+he ne;t sections e;plain how to "atch a Gas Lifted Well "odel5

0ntering Well +est *ata

Press Matching$Matching$ /LP$!P1 ,uality %hec- 0nter the following Well +est *ata5o *ate of the Well +esto Wellhead Flowing Pressure ,+ubing .ead Pressure-o Wellhead Flowing +e"perature ,+ubing .ead +e"perature-

o Water %uto Li=uid 1ate ,Maing sure that the oil rate has been "ultiplied by the shrinage sothat it is in Stoc +an Barrels per day before being added to the water rate-o *ownhole Gauge *epth ) fro" either a per"anent downhole gauge or at the deepestdepth of a downhole pressure sur2ey

HIJ !f there is no gauge data enter 9 deptho *ownhole Gauge Pressure ) fro" either a per"anent downhole gauge or at thedeepest depth of a downhole pressure sur2ey

HIJ !f there is no gauge data enter 9 pressureo Produced GO1 fro" the reser2oiro 0nter 9 for GO1 freeo 0nter Gaslift Gas 1ateo 0nter Gaslift !nection *epth ,Measured *epth-

HIJ ,+his *epth should be the sa"e as in the *ata 1e=uired for Gas Lift 'nalysis Section-

%alculating the O2erall .eat +ransfer %oe@cient

Press the 6 button at the left of the Well +est entered ) under Match *ata Press 0sti"ate ? /alue Write down the O2erall .eat +ransfer %oe@cient calculatedo +he 2alue should be between 6 to 79 B+?$h$ft7$*eg F Press O4


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Press *one Press Syste"$0=uip"ent ,+ubing etc- Press the large button ne;t to Geother"al Gradient 0nter the calculated O2erall .eat +ransfer %oe@cient in the bo; on the right Press *one Press *one

Selecting the /ertical Lift %orrelation for the Well

*o not carry out this step if there is no downhole gauge data

Press Matching$Matching$ /LP$!P1 ,uality %hec- Press the 6 button at the left of the Well +est entered ) under Match *ata Press %orrelation %o"parison When the O2erall .eat +ransfer %oe@cient entered is displayed ) Press O4 Select the following /ertical Lift %orrelations5o Fancher Brown ) which will ?nder Predict the pressure drop in the tubingo *uns & 1oss Modi(ed ) which should O2er Predict the pressure drop in the tubingo Petroleu" 0;perts 7 ) which should be close to predicting the pressure drop in thetubingo Petroleu" 0;perts ) which should be close to predicting the pressure drop in thetubing Press %alculate Press %alculate Press O4 Press Plot !f the downhole gauge pressure point is not between Fancher Brown and *uns & 1ossModi(ed there is probably a proble" with the well test data %hose the closest correlation to the downhole gauge pressure point ) betweenPetroleu" 0;perts 7 and Petroleu" 0;pertso *o Not %hose *uns & 1oss Modi(ed or Fancher Brown Press Main

Matching the /ertical Lift %orrelation for the Well

*o not carry out this step if there is no downhole gauge data

*o not carry out this step if the "ultiphase correlation selected predicts the pressuredrop in the well

Press Match Select the /ertical Lift %orrelation that was closest to predicting the downhole gaugepressure point Press Match Press O4 !f the Para"eter 6 2alue is greater than 69K or less than 9K do not use the well test

data !f the Para"eter 7 2alue is greater than 6C or less than 9> do not use the well testdata Press *one

Matching the Producti2ity !nde; of the Well

Press !P1 Select the /ertical Lift %orrelation that has been "atched ) or the closest 2ertical lift


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correlation to the downhole gauge datao Mae sure no other correlations are selected Press %alculate Press O4 Press !P1 Press %alculate

!f the *iAerence between the Measured Li=uid 1ate and the %alculated Li=uid 1ateis Greater than 97 5o Press Finisho *rag the !P1 screen a little to the right of the co"puter screen ) so that the greenbuttons on the right of the screen are 2isibleo Press !nput *atao 1educe the Producti2ity !nde; ,P!-o Press %alculate

!f the *iAerence between the Measured Li=uid 1ate and the %alculated Li=uid 1ateis Less than # 97 5o Press Finisho *rag the !P1 screen a little to the right of the co"puter screen ) so that the greenbuttons on the right of the screen are 2isibleo Press !nput *atao !ncrease the Producti2ity !nde; ,P!- Press %alculate

4eep changing the Producti2ity !nde; until the *iAerence between the MeasuredLi=uid 1ate and the %alculated Li=uid 1ate is between )97 and 97 Press Main Press Main

%hec the Well Match in uicloo

Press Matching$uicloo

0nter the following Well +est *ata5o Wellhead ,+ubing .ead- Pressureo Wellhead ,+ubing .ead- +e"peratureo Li=uid 1ateo Water %uto +otal Gas 1ate ) +his is the Produced Gas 1ate fro" the 1eser2oir 8 the Gas Lift Gas!nection 1ateo Gas !nection 1ateo %asing .ead Pressureo Ori(ce *ia"eter ) at the depth of inection used in the well test "atchingo !nection *epth ,Measured- ) ,Measured *epth-o Select the /ertical Flow %orrelation that was used in Matching the Producti2ity !nde;of the Well

o Select *o"e Pressure %orrection ,abo2e 6799 psig- to


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%asing +heoretical Line ,arrows going down-o +heoretically3 when inecting at the correct depth3 the %asing Measured will begreater than or e=ual to the %asing +heoretical ?ncertainties and errors in well testdata can cause so"e de2iationo !f the %asing Measured is within 8# K9 psi of the %asing +heoretical pressure3 theassu"ed inection depth is correcto !f the %asing Measured is "ore than K9#699 psi greater than the %asing +heoreticalpressure3 then5

HIJ +he assu"ed inection depth "ay be correct but there "ay be a proble" such as aplugged ori(ce

HIJ +he inection depth "ay be deeper than assu"ed !n this case3 assu"e the inectionoccurs at the ne;t 2al2e downo !f the %asing Measured is "ore than K9#699 psi less than the %asing +heoretical thewell can not lift at the depth entered !n this case3 assu"e inection occurs at the ne;t2al2e upo !f the %asing Measured is greater than 699 psi less than %asing +heoretical at oneinection depth and if %asing Measured is greater than 699 psi "ore than %asing

+heoretical at the ne;t 2al2e up3 then "ultipointing at the two depths is possible Press Main

!f the assu"ed inection depth is changed3 repeat the entire well "atching processusing the new inection depth

!f the assu"ed inection depth is correct3 continue to the ne;t step

?pdate the Gas Lift *ata with the (nal inection depth

Press Syste"$Gas Lift *ata Select Fi;ed *epth of !nection 0nter the inection depth deter"ined fro" the well "atching in Gaslift /al2e *epth,Measured- Press *one

Maing Sure the Well Model can Predict the Well +est 1esult

Press %alculate$Syste" ,!pr 8 /lp- Fro" the Well +est 0nter5o Wellhead Flowing Pressureo Water %uto ,No Surface %alculations will be carried out ) so ignore Surface 0=uip"ent%orrelation-o Select the /ertical Lift %orrelation that was closest to the downhole gauge data orwas "atched to the downhole gauge data Mae sure the Solution Node is the Botto" Node For 1ate Method select 'uto"atic # Linear Press %ontinue

For /ariable 6 select +otal GO1 Press 0nter /alues to the right of /ariable 6 0nter the Produced GO1 fro" the 1eser2oir Press *one For /ariable 7 select Gaslift Gas !nection 1ate Press 0nter /alues to the right of /ariable 7 0nter the Gaslift Gas !nection 1ate fro" the Well +est Press *one Press %ontinue


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Press %alculate Press O4 %hec that the Li=uid 1ate calculated is the sa"e as the well testo !f it does not go bac to the section 0ntering Well +est *ata Press Plot Press Main

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