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

正确答案：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

正确答案：pD=（pi-p）/pc

第三章单元测试

1、The dry gases at the surface “dry” indicates that no（）form in the surface equipment during production.

A.water

B.liquid hydrocarbons

C.heavy hydrocarbons

D.connate water

正确答案：liquid hydrocarbons

2、The total cumulative gas production is the difference between original gas in place and gas in place at some（）.

A.later conditions

B.economic conditions

C.abandonment conditions

D.technical conditions

正确答案：abandonment conditions

3、Because of reservoir（）， the encroaching water does not sweep some portions of the reservoir effectively.

A.heterogeneities

B.discontinuities

C.water influx

D.faults

正确答案：heterogeneities；discontinuities

4、To account for the unswept portions of the reservoir， we introduce a（） into the volumetric equation.

A.volumetric sweep efficiency

B.water saturation

C.recovery factors

D.gas saturation

正确答案：volumetric sweep efficiency

5、Material balance methods provide a simple and effective methods for estimating（） at any stage of reservoir depletion.

A.original gas in place

B.recovery factor

C.gas reserves

D.production

正确答案：original gas in place；recovery factor；gas reserves

6、The dominant drive mechanism of normal volumetric dry gas reservoir is（）as reservoir pressure decreases.

A.rock expansion

B.water expansion

C.oil expansion

D.gas expansion

正确答案：gas expansion

7、The Methods for estimating water influx include（）.

A.horner method

B.van Everdingen-Hurst method

C.Carter-Tracy method

D.Fetkovich Method

正确答案：van Everdingen-Hurst method；Carter-Tracy method；Fetkovich Method

8、To develop the material balance equation for a volumetric geopressure gas reservoirs， the drive mechanism including（）during the productive life of the reservoir.

A.gas expansion

B.rock expansion

C.water expansion

D.oil expansion

正确答案：gas expansion；rock expansion；water expansion