A brief history of Saudi oil discovery8 Oct 2025 08:23
In May 1933, Standard Oil Co was allowed to start exploration. The Americans first had a look at three different promising locations, before deciding on the Dammam Hills.
"On April 30, 1935, it was decided to start work by digging Dammam Well No. 1; following seven months of uncertainty and despair, the well produced a powerful gush of gas and some oil when the drilling depth reached around 700 meters, but an equipment failure forced the drilling crew to stop the well's flow and blocked it with cement, and Dammam Well No. 2 produced better results."
"When the well was tested in June 1936, 335 barrels per day flowed from it. A week following that test, and after acid treatment, production of oil flowing from the well stood at 3,840 barrels per day, which encouraged drilling of Dammam Wells 3, 4, 5 and 6 without waiting to confirm that production will be in commercial quantities or recognizing the size of the field discovered. A decision was then issued in July to prepare Dammam Well No. 7 as a deep test well."
"By the end of 1936, the number of Saudi workers had increased to 1,076, in addition to 62 non-Saudi workers. Things were supposed to be going normally, but, unexpectedly, Dammam Well No. 1 failed after a depth of more than 975 meters. Meanwhile, Dammam Well No. 2 was found to be moist, which meant that it produced water mainly, as water production was 8 or 9 times higher than its oil volume, and the production of Dammam Well No. 3 did not exceed 100 barrels of heavy oil per day, with 15% of this production comprising water. Wells 4, 5, and 6 were proven dry."
Oil was not flowed in commercial quantities until 1938, despite the vast allocation of manpower and financial resource from what was then the largest oil company in the world.
(Source: https://saudigazette.com.sa/article/625280#:~:text=Wells%204%2C%205%2C%20and%206,the%20work%20camp%20in%20Dammam. )
Considering PG, essentially a one-man band, has spent just £16.4M in Morocco in 4 years (Source: Note 7 of June 30th 2025 accounts), I think he is doing rather well.