1、To develop analysis and design techniques for well testing, we must make several simplifying assumptions about the well and reservoir being modeled. These assumptions are introduced as needed to combine ( ).
A、the principle of mass conservation
B、an equation of fluid motion
C、an equation of state
D、an equation of well testing
2、In a ( ) reservoir, fluid flows radially from the reservoir to the wellbore.
A、Homogeneous-acting
B、Heterogeneous-acting
C、polyhedral
D、cylindrical
3、Assuming that the ( ) is zero, we can write a mass balance on the element as win–wout=qm .
A、pressure
B、velocity
C、net generation of matter
D、the mass flow rate into the system
4、An EOS relates volume (or density) to ( ).
A、pressure
B、velocity
C、temperature
D、viscosity
5、The assumption of constant is valid only for ( ).
A、very low pressure and gas gravities at low temperatures
B、very low pressure and gas gravities at high temperatures
C、very high pressure and gas gravities at low temperatures
D、very high pressure and gas gravities at high temperatures
6、The assumptions of ideal-reservoir model include ( ) and negligible gravity effects.
A、Homogeneous and isotropic porous medium
B、pressure dependent rock and fluid properties.
C、applicability of Darcy’s law
D、uniform thickness, radial flow, small pressure gradients
7、Using the reference length, we define dimensionless radius as ( ).
A、rD=r˙rw
B、rD=r/rw
C、rD=rw/r
D、rD=r-rw
8、We would like pD=0 when p=pi , pD to increase with time and pD to be positive. So we rewrite pD in the form ( ).
A、pD=(pc-p)/pi
B、pD=(p-pc)/pi
C、pD=(p-pi)/pc
D、pD=(pi-p)/pc
