Page 121 - Fundamentals of Enhanced Oil and Gas Recovery

Miscible Gas Injection Processes 109

reservoir temperature from 35 to 88.9 C. If MMP is less than bubble point pressure,
bubble point pressure will be taken as MMP.

Example 4.5: Calculate the MMP by using the Eq. (4.13) for the given data in
Example 4.3.

Solution: The MMP is calculated by means of Eq. (4.13) as follows:
MMP 5 12:6472 1 0:015531 3 ð1:8 3 T R 1 32Þ 1 1:24192 3 10 24
716:9427
2
3 ð1:8 3 T R 132Þ 2 5 15:154 MPa
1:8 3 T R 1 32
from Eq. (4.13)

4.3.2.4 Orr and Jensen [36]
In addition to Yellig and Metcalfe [35], Orr and Jensen [36] established a new MMP
correlation as a function of reservoir temperature (T R ) by the following equation:

2015
MMP 5 0:101386 3 EXP 10:91 2 (4.14)
255:372 1 0:5556 3 ð1:8 3 T R 1 32Þ
in which, T R and MMP indicate the reservoir temperature in C and minimum mis-

cibility pressure in MPa, respectively. This correlation is developed based on the reser-

voir temperature from 35 to 88.9 C. If MMP is less than bubble point pressure,
bubble point pressure will be taken as MMP.

Example 4.6: Calculate the MMP by using the Eq. (4.14) for the given data in
Example 4.3.

Solution: The MMP is calculated by means of Eq. (4.14) as follows:
!
2015
MMP 5 0:101386 3 EXP 10:91 2
255:372 1 0:5556 3 ð1:8 3 T R 1 32Þ
5 18:458 MPa
from Eq. (4.14)

4.3.2.5 Alston et al. [37]
Alston et al. [37] created a new MMP correlation as a function of reservoir tempera-
ture (T R ), MW C51 , and volatile to intermediate components ratio (Vol/Int) by the
following relationships:
If P b $ 0:345 MPa;
0:136
(4.15)
MMP 5 6:056 3 10 26 3 ð1:8 3 T R 132Þ 1:06 3 ðMW C 51 Þ 1:78 3 Vol
Int