POL discovers largest oil, gas reserves

ISLAMABAD, Oct 4 (APP): Pakistan Oil fields Limited
(POL) had discovered one of the largest oil and gas reserves
from its Jhandial well (Punjab) in last five years.
Jhandial well is located in Ikhlas Block in Northern
Potwar, about 83 kilometers Southwest of Islamabad in District
Attock said an official.
POL holds 80% share in the block whereas The Attock
Oil Company (AOC) has a 20% share.The block is located in
a prospective but geologically complex area surrounded by a
number of significant oil discoveries.
The drilling of the deep exploratory well Jhandial-1 was
proposed after acquisition and interpretation of recently
acquired 3D seismic data.
The well was drilled to a total depth of 18,497 feet to
test the Eocene and Paleocene carbonate reservoirs.
During testing, significant amount of hydrocarbons (oil
and gas) were encountered in the Sakessar, Nammal(Eocene)
and Patala (Paleocene) formations with flow rates of 21 million
cubic feet of gas and 2,520 barrels of oil per day at choke size
of 40/64″at well head flowing pressure of 3,768 psi, 19 million
cubic feet of gas and 2,160 barrels of oil per day at choke size
of 32/64″at well head flowing pressure of 5,364 psi and 16.5
million cubic feet of gas and 1,630 barrels of oil per day at
choke size of 28/64″at well head flowing pressure of 6,290 psi.
The American Petroleum Institute (API) gravity of the
oil is around 40ø and the gas has a rich calorific value of 1,161
British Thermal Units per standard cubic feet of gas.
The gas composition analysis indicates that it contains
about 86% methane, 7.2% ethane and 2.9% propane.
The LPG content of the gas is about 2.5 metric tons per
million cubic feet of gas.The well will be connected to the
production line within two weeks and will gradually attain full
Structurally,Jhandial is a thrusted anticline just north
of the Dhurnal Oil field.
It has a closed area of about 15 square kilometers in the
most likely case, with a thick net reservoir column from top of
the Chorgali Formation (Eocene) to the base of the Paleocene
Preliminary initial estimated recoverable reserves of the
field are in the range of at least 292 billion standard cubic feet
of gas and 23 million barrels of oil.
The Jhandial discovery is expected to contribute to the
country’s energy sustainability while also having a positive
impact on the future of exploratory efforts in the block and
surrounding areas.