Here is further elaboration of how they find oil in bohai bay It took them 4 decades! to do the ground work. The experience gain in prospection oil in Shallow water will be applied to similar basin. The new oil field will start production in 2025 once they built the production platform as I said 3 to 4 years
The discovery well, Kenli 10-2-4, was drilled and completed at a depth of 1,520 meters, and encountered oil pay zones with a total thickness of approximately 27 meters. The well was tested to have an average daily output of 81.55 tons of crude oil. "The successful discovery of the Kenli 10-2 oilfield marked a breakthrough in discovering lithological oilfield with reserve of 100 million tons in the shallow depression zone of the Bohai oilfields.
It demonstrated the broad prospect for the exploration of lithological structures in the Bohai, and has great significance as a guide for exploration in similar basins," said Xu Changgui, who heads the exploration department of CNOOC. The story behind the discovery of lithological oilfield in Laizhou Bay Sag in Bohai Bay was many rounds of exploration over a course of four decades. The engineers also adopted the multiple-hole drilling method to reduce the duration of project by 90 days, helping to save 15 percent of the total input. "For miles around the Kenli 10-2 oilfield, there are multiple oilfields including Kenli 10-1 and Kenli 10-4 that are already in production. So the area is fully equipped for construction.
We expect the new oilfield to begin full production in 2025, which will help to increase 40 million tons of oil production in Bohai's oilfields," said Xu. The achievement marked another milestone in Bohai Bay following the discovery of more than 100 billion cubic meters of natural gas reserves at the Bozhong 19-6 oilfield, over 100 million tons of oil and gas reserves at the Bozhong 13-2 oilfield, as well as more than 100 million tons of crude oil reserve at the Kenli 6-1 oilfield. As China's major offshore oil production site, engineers have discovered nearly 800 million tons of oil and gas reserves at Bohai Bay since 2018.