In the ranking of global oil reserves, Saudi Arabia's oil reserves are not the first

Oil is a non-renewable resource, and once a region or country owns oil, it is equivalent to sitting on wealth
.
Oil has a profound impact on
a country and a region.
The so-called blessings and misfortunes depend on each other, some countries have oil and can get rich and oily, while some countries are poor and destitute, and wars are continuous
.
As of the beginning of 2019, the global proven oil reserves were 1.
7 trillion barrels
.

Oil reserves rank 5th: Iraq

Iraq, located in southwestern Asia, has a long history, and the Two Rivers Valley (Mesopotamia) is one
of the birthplaces of the world's ancient civilizations.
Iraq is blessed with unique geographical conditions, rich oil and gas resources, and the oil industry is the main pillar of the
economy.
Proven oil reserves reached 147.
2 billion barrels, ranking fifth in the
world.

Iraqi oil is mainly distributed in 73 areas of the territory, and only 15 areas
have been extracted so far.
70 per cent of Iraq's natural gas is oil associated with gas, mainly from the Kirkuk field in the north and the Rumaila field
in the south.
Due to the shallow burial and ease of mining, Iraqi crude oil costs about $
10.
70 per barrel.

Oil reserves ranked 4th: Iran

Iran, located in West Asia, belongs to the Middle East countries, known as
the "Eurasian Land Bridge" and the "East-West Air Corridor".
Iran has abundant oil and gas resources, and Iran's extracted oil is partly sold domestically and exported partly, while Iran's proven oil reserves are 155.
6 billion barrels
.

Iran's oil and gas fields are concentrated in the southern region of Khuzestan
.
Iran has about 20 oil fields producing oil, of which the combined production of 6 oil fields in Ahvaz, Mulen, Gachsaran, Agajari, Bibihakimai and Paris accounts for two-thirds
of Iran's total national production.
Iran's oil is buried shallowly, the difficulty of extraction is low, and the oil products are mainly based on light and medium-quality crude oil, and the difficulty of refining is relatively low
.
Crude oil extraction costs less than $10 a barrel per barrel
.

Oil reserves ranked 3rd: Canada

Canada is a North American land and sea country located in the north of North America
.
Of these, 97% are in the form of oil sands
.
Canadian oil reserves of 169.
7 billion barrels, accounting for 11.
4% of the world's total, after Saudi Arabia and Venezuela, ranking third in the
world.
Why does Canada have so many abundant energy resources but no "place" in the international energy market?

Canada's oil sands have high density, high viscosity, high sulfur content, high nitrogen content, high residual carbon residue and high metal content, and the mining cost is very high
.
The cost of 1 barrel of high-quality oil that Canada now extracts is about $
41.
In contrast, the Middle East countries have good geographical location and low extraction costs, which is the main reason why Petro-Canada has not been developed for a long time
.

Oil reserves rank 2nd: Saudi Arabia

Saudi Arabia, located in the Middle East, has always been rich in oil and is a veritable "oil kingdom", with 90% of its economy derived from the export of petroleum fuels
.
Saudi Arabia's oil reserves are 297.
6 billion barrels, the second largest
in the world.
At present, Saudi Arabia has a total of 110 proven oil and gas fields, of which about half of the oil reserves are distributed in 8 oil fields, the main oil and gas fields are Ghawar, Safagna, Buqaiq, Bailey, Manifa, Zuluf, Sheba, Absafa and Khursnya
.
Saudi Arabian oil is of good quality, mainly light oil, and Saudi Arabian crude oil extraction costs are very low, averaging less than $10 per barrel, which is why sales volume is the first in the
world.

Another major feature of Saudi Arabia is the prince, which currently has a total of more than 5,000 princes, and the king succession rules of Saudi Arabia are also very special, that is, "brother after brother"
.

Ranked 1st in oil reserves: Venezuela

Venezuela, a small country in the northeastern part of South America, is one of the world's most important oil producers and exporters, with oil reserves of 303.
8 billion barrels
.
Petroleum resources are mainly distributed in the western Maracaibo Lake region, the eastern Ansoatgi region, the Monagaz region and the central Barinas region and the Aplan region
.
Lake Maracaibo is the largest lake in Latin America, with an area of about 14,300 square kilometers, is the richest lake in the world, with oil reserves of about 5 billion barrels, 16,000 oil wells, and an annual output of 70 million tons of crude oil
.

The reason why Venezuela has the world's largest reserves is mainly because Orinoco has many heavy oil reserves, with recoverable reserves of about 235 billion barrels, accounting for 75% of Venezuela's oil reserves
.
However, because Orinoco's oil belongs to the high-sulfur crude oil, which is called heavy oil, which is stored underground in the form of oil sands, unlike Saudi Arabia's light crude oil, heavy oil must be refined and mixed with light oil before it can be exported
.
This is also because Venezuela still cannot compare
with Saudi Arabia in terms of oil exports.
The cost of mining is $23.
50 a barrel
.
Venezuela, the world's largest oil reserve, is still economically destitute
.

The distribution of oil and gas resources in China is very uneven, with more north and less south, and very few
land reserves south of the Yangtze River.
Petroleum resources are concentrated in the eight major basins of Bohai Bay, Songliao, Tarim, Ordos, Junggar, Pearl River Estuary, Qaidam, East China Sea Shelf and South China Sea
.

China's oil reserves are about 25.
7 billion barrels, ranking 13th in the
world.
More importantly, the cost of oil extraction in our country is very high, exceeding that of most countries
.
The cost of mining is about $50 a barrel
.
Offshore mining costs about $60 a barrel
.
Therefore, China can only rely on imports to become the world's largest importer of
crude oil.