From Gas Well Testing Handbook

Symbol

Description

Field units

Metric (SI)units

A

Drainage area

ft 2

m

A

Gross cross-sectional area

a

Coefficient in the stabilized deliverability equation

a t

Coefficient in the transient form of deliverability equation

a 1

Coefficient in the stabilized deliverability equation

a 11

Coefficient in the stabilized deliverability equation

A

Gross cross-sectional area

A

Drainage area

ft 2

m 2

AOF

Absolute open flow potential of a well or the deliverability against a zero sandface pressure (Ch. 3)

mmscfd

kmol/d

b

Coefficient in the stabilized deliverability equation

b 1

Coefficient in the stabilized deliverability equation

b 11

Coefficient in the stabilized deliverability equation

c

Compressibility of gas at average conditions

psia 1

kPa 1

c f

Formation compressibility

psia 1

kPa 1

c g

Gas compressibility

psia 1

kPa 1

c 0

Oil compressibility

psia 1

kPa 1

c t

Effective total compressibility

psia 1

kPa 1

c w

Water compressibility

psia 1

kpa 1

c wf

Gas compressibility corresponding to pwf

psia 1

kPa 1

Cws

Compressibility of wellbore fluids evaluated at the mean wellbore temperature and pressure

psia 1

kPa 1

C

Coefficient in the deliverability equation

C A

Shape factor

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Pinch Valves
Pinch valves include any valve with a flexible elastomer body that can be pinched closed, cutting off flow, using a mechanism or fluid pressure.
Pressure Sensors
Pressure sensors include all sensors, transducers and elements that produce an electrical signal proportional to pressure or changes in pressure.
Globe Valves
Globe valves are linear motion valves with rounded bodies, from which their name is derived.  They are widely used in industry to regulate fluid flow in both on/off and throttling service. 
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Foam bonding tapes are specialized tapes designed for adhesive joining of foam materials.

Topics of Interest

Symbol Description A Drainage area A ? Drainage area constant AOF Absolute open flow potential of a well or the deliverability zero sandface pressure b...

7.1 Introduction Deliverability testing is a commonly used technique for predicting shortterm and long-term behavior of gas wells. Typically, a well is flowed at different rates, and the pressure...

4.1 Introduction This chapter discusses basic flow equations expressed in terms of the pseudopressure ?( p) and of approximations to the pseudopressure approach that are valid at high and low...

3.1 Introduction This chapter includes steady- and pseudo-steady-state equations for gas flow through a reservoir. For each subsection, flow equations for vertical wells are described first,...

15.1 Introduction This chapter presents various field case studies in low, high permeability, and fractured carbonate gas wells including summary, conclusions, and recommendations. It also includes...