mod 2 & 3

Question 1

What can be determined through analyzing the results of a deliverability test?

Answer 1

a well’s absolute open flow potential. additionally, parameters can be determined to predict production rates as a function of flowing pressure and reservior pressure

Question 2

Describe the concept of transient flow, stabilization and pseudo steady state

Answer 2

A certain amount of energy is required to overcome the resistance of flow through the reservoir which results in a pressure decrease in the direction of flow, toward the well

Question 3

When does the pressure change for any point in a reservoir become constant?

Answer 3

at Pseudo steady state

Question 4

What does the rate of pressure decline during a pseudo steady state depend on ?

Answer 4

Depends on the production rate and the reservoir size

Question 5

What affects the duration of the late transient period?

Answer 5

The shape of the reservoir – ie: circular or retangular

Question 6

When is the Transient period occuring during a Sandface Pressure vs Time for a Finite Reservoir?

Answer 6

When it is infinite acting (boundaries are not felt)

Question 7

What should be noted when considering u (mew…?) and z in the equation for the gas production rate under pseudo steady state conditions?

Answer 7

Viscosity and z are to be evaluated at the average reservoir pressure

Question 8

what may n range from - to?

Answer 8

from 1.0 (laminar flow) to 0.5 (turbulent flow)

Question 9

In the simplified equation, what is the intercept equal to?

Answer 9

-1/n * log(c)
and
log(c) = -n*intercept
so therefore
c = 10 ^ (-n * intercept)