Theoretical Analysis Of A Technological Refinery Upgrade In Nigeria

Nigerian refinery and their capacities 
Kaduna refinery = 100,000 barrels per stream day (bpsd) (1975)
Warri refinery = 100,000 bspd (1978) + 25,000 bspd (upgrade 1987) =125,000 bpsd
Port Harcourt = 60,000 bspd (old 1965) +150,000 bspd (new 1989) =210,000 bpsd
Total installed capacity = 435,000 bpsd
How many gallons of petrol and diesel in a barrel of crude oilA barrel of crude oil = 42 gallons 
A barrel of crude oil = 19 gallons of petrol (71.92 litres) [1 gallon =3.785 litres]
= 12 gallons of diesel (45.42 litres)

Total petrol and diesel output at 70% efficiency@70% efficiency per day =70%*435,000 bpsd = 304,500 bpsd
Amount of petrol produced @ 70% efficiency = 304,500bpsd * 71.92 =21,899,640 litres per day
Amount of diesel produced @ 70% efficiency = 304,500bpsd * 45.42 =13,830,390 litres per day
Average daily consumption I couldn’t find any recent data for the total petrol consumption of the year 2014, but according to The Petroleum Products Pricing Regulatory Agency (PPPRA) in 2013 the annual consumption of petrol stood at 39.66 million barrels (6.2billion litres).
Convert barrels to litres at (1 barrel =158 litres) [US barrel to litres] 
If the yearly consumption (2013) =6.2 billion litres 
Daily consumption (2013) = 6.2billion litres/365 = 17,167,890.41 litres per day

The above information is purely based on standard best practices, but after digging further I discovered statistic for refined products in kaduna refinery as follows 
No Product Production Rate 1 PMS 3,857 MT/DAY 
2 KEROSENE 1,686 MT/DAY 
3 AGO [DIESEL] 3,000 MT/DAY 
4 ASPHALT 1,796 MT/DAY 
5 LAB 91 MT/DAY 
6 BASE OILS 657 MT/DAY 
7 LPG 620 MT/DAY 
8 FUEL 2,100 MT/DAY 
This infers that kaduna refinery only produces 3857 metric tons of petrol per day which is about 5.2 million litres daily assuming the density of petrol is 737.22kg/m3. This production value is 2 million litres shy of the internationally accepted rate which could be due to the age of the plants technology. 
Sources NNPC. (2005). Kaduna Refining & Petrochemical Company (KRPC).Available: http://www.nnpcgroup.com/NNPCBusiness/Subsidiaries/KRPC.aspx.
NNPC. (2005). Warri Refining & Petrochemical Company (KRPC).Available: http://www.nnpcgroup.com/NNPCBusiness/Subsidiaries/WRPC.aspx
NNPC. (2005). Port Harcourt Refining Company Limited (PHRC).Available: http://www.nnpcgroup.com/NNPCBusiness/Subsidiaries/PHRC.aspx.