1053 Tubing Performance1

7/29/2019 1053 Tubing Performance1

1/22

Outflow 18/04/02 Outflow.p

How do we get hydrocarbons to

What is tubing performanc

How do we size tubing?


2/22


At the end of this session you should be ab

Explain what tubing performance is

Describe the key features of tubing perfo

Carry out a tubing size selection exercise


3/22


Just as we optimise the Inflow performanthe reservoir to the wellbore, we also neeOutflow performance from the bottom of

Tubing performance is the term used to d

performance. It is also called Vertical Lift

Tubing Performance looks at optimising/pressure losses at lowest life cycle cost.pressure drop, we maximise production.


4/22


In order to flow from the bottom of the wneed to overcome several pressure drop

Hydrostatic head

Frictional losses

Acceleration effects

(normally negligible)


5/22



6/22



7/22



8/22


Bubble flow - dispersed bubble of gas inphase;

Slug flow - coalescing bubble in larger oacross the entire pipe x-section. Between

are slugs of liquid with entrained smaller

Churn flow - highly turbulent flow patternboth gas- and liquid phase

Annular flow (mist flow) - gas is continuodispersed liquid droplets; liquid moves aboundary layer to the pipe;


9/22


INCREASE of PWFdue to fluid hold-up INCREASE of PWF

due increasing friction


10/22


Flowing tubing pressure

Length of tubing

Friction factors

Tubing diameter

Fluid composition (liquid/gas)


11/22


Flowin

gbottomholep

ressurePWF

Flow rate (Q)

THP1 > THP2


12/22


Flowin

gbottomholepressurePWF

Flow rate (Q)

2


13/22


Flowin

gbottomholep

ressurePWF

PWF

Flow rate (Q)


14/22



15/22


IPR - Inflow Performance Relationship

IPC - Intake Pressure Curve

TPC - Tubing Performance Curve

CPC - Choke Performance Curve


16/22


To isolate the well from downstream pres

Control of downhole pressure

QPfwh PFLD2 P fwh

Critical flow:

Single -phase gas flow : PFTH

Multi-phase gas-liquid flow : PFTH

D1


17/22


Tubing performance is the term used to dperformance.

Tubing performance dependent on:

Flowing tubing pressure

Length of tubing

Friction factors

Tubing diameter

Fluid composition (liquid/gas)

Definition of terms

Use of Choke


18/22


In your syndicate groups, please do the fo

Explain what tubing performance is

What are IPC, TPC & CPC

Describe the key parameters which tubinwhat are they & how do they affect tubin


19/22

1 99 9 S he ll I nt er na ti on al E xp lo ra ti on & P ro du ct io n B V O ut fl ow2 .p pt , p ag e 1P180

Pressure Losses in Oil Production.


20/22

1999 Shell Intern ational Exploratio n & Production BV Outflo w2.ppt, pa ge 2P180

The Function of a Completion


21/22


Dual Completion


22/22


Representation of Flowing Well

Documents

1053 Tubing Performance1