QUESTION $1(11$ marks$)$

$\backslash$table$[[$CLO$,$CLO$1],[$Marks$,11]]$

A volumetric and undersaturated oil reservoir has PVT data as shown in Figure $1.$ The initial reservoir pressure was $2500a$ and the reservoir temperature is $170F.$

Calculate the recovery factor at $1850$ psia if all the produced gas is injected back to the same reservoir. Standard condition: $15a$ and $60F.$

$(11$ Marks$)$

QUESTION $2(19$ Marks$)$

$\backslash$table$[[$CLO$,$CLO$1],[$Marks$,19]]$

A gas cap reservoir is estimated to have an initial gas cap volume with a size half of its' initial oil zone. The production data is given in Table $1.$ Estimate the oil initially in place using the Havlena and Odeh method.

$(19$ Marks$)$

$\backslash$table$[[\backslash$table$[[$Pressure$],[($psia$)]],\backslash$table$[[$Np$],[($MMSTB$)]],\backslash$table$[[$Rp$],[($SCF$/$STB$)]],\backslash$table$[[$Bo$],[($bbl$/$STB$)]],\backslash$table$[[$Rs$],[($SCF$/$STB$)]],\backslash$table$[[$Bg$],[($bbl$/$SCF$)]]],[)=(Pb,,,1\mathrm{.}2511,510,0\mathrm{.}00087],[3000,5\mathrm{.}903,1060,1\mathrm{.}2222,450,0\mathrm{.}00096],[2700,11\mathrm{.}503,1235,1\mathrm{.}2022,401,0\mathrm{.}00107],[2400,17\mathrm{.}730,1300,1\mathrm{.}1822,352,0\mathrm{.}00120]]$

$2$