© 2019 Department of Petroleum Resources. All rights reserved Department of Petroleum Resources (DPR) PROCEDURE GUIDE

Page 43 of 114

42 | P a g e

6.1 Purpose
6.1.1 The purpose of this exercise is to compute the monthly production of petroleum and
petroleum product into the facility and establish the stock of petroleum and petroleum
product in storage at the end of the month by material balancing. All facilities shall
apply static measurement procedure for daily, mid-month, monthly, and annual
fiscalization.
6.1.2 For petroleum, the exercise shall be carried out at:
8.00am for daily fiscalization
8.00am on the sixteenth day of every month for mid-month fiscalization
8.00am on the first day of every month for monthly fiscalization.
8.00am on the first day of every year for annual fiscalization
6.1.3 For petroleum products, the exercise shall be carried out at:
6.00am for daily fiscalization.
6.00am on the sixteenth day of every month for mid-month fiscalization.
6.00am on the first day of every month for monthly fiscalization.
6.00am on the first day of every year for annual fiscalization.

6.1.4. The National Production Monitoring System (NPMS) platform shall be complied with
by all Operators for submission of daily production, stock and export volumes.

6.2 Procedure for Stock Measurement
The step to follow in conducting facility receipts and stock measurement shall be as outlined
hereunder:
6.2.1 The tank shall be drained after which it is gauged for stock taking. However, if the tank
has just been filled, it is allowed to settle for at least one hour before it is drained. In a
case like this, the gauging for stock taking could be carried out later than the stipulated
8. 00 am/6 .00 am, as applicable.
6.2.2 If a tank is discharging into a tanker at 8.00 am the practice to follow is to allow it to
continue discharging rather than halting the operation purposely for the stock taking
exercise. However, for such a tank, the opening gauge before the commencement of
loading is recorded as the stock at 8.00 am and NOT the gauge after the loading
operation. This thus implies that the quantity of petroleum and petroleum product
already discharged into the tanker is theoretically brought back to the tank farm. The
corollary to this is that the shipment in question is treated as having taken place during
the new month.
6.2.3 Where a tank is receiving production on the first day of the month, the filling of such a
tank is stopped at 8.00 am and the filling is immediately switched to another tank
which has already been gauged. It is an ERROR to switch the filling to an unfiscalized