China hits jackpot with massive 110-million-ton offshore oil discovery
China National Offshore Oil Corporation (CNOOC) announced on Monday the discovery of a major oilfield in the eastern South China Sea, estimated to hold up to 110 million tons of oil reserves.
The discovery of the Huizhou 19-6 offshore oil field highlights the future of oil and gas reserves. Production lies in deep to ultra-deep layers. Though exploring oil and gas at these profound depths poses numerous concerns and challenges, China’s latest success in locating yet another reservoir of large-scale potential has been called another breakthrough in a series over the past two years.
According to Global Times, the oilfield is 106 miles off the coast of Shenzhen in South China’s Guangdong Province. Its average water depth is 328 feet. Drilling at these deep to ultra-deep layers will drive the industry forward. But the company acquiesces that it won’t be an easy feat.
Can we dig deeper?
The Huizhou 19-6 offshore oil field is “the country’s first large-scale integrated clastic oilfield discovered in deep to ultra-deep layers,” according to the CNOOC via The Global Times.
Heralded as a major breakthrough in China’s search for attractive offshore drilling options, tests have yielded 413 barrels of crude oil and 68,000 cubic meters of natural gas. The numbers speak to the massive and untapped potential lurking at these depths.
A CNOOC’s Shenzhen branch representative said deep to ultra-deep layers comprise up to 60% of the latest oil and gas reserves worldwide. The technology to drill at these levels has advanced quickly over the last few decades, but not enough.
During the period referred to as the “13th Five-Year Plan,” a series of tools, such as vertical drill instruments, were developed. But the industry still faces significant challenges related to accessing raw materials at deep and ultra-deep layers due to “geological difficulties.”
During this period, China surpassed the U.S. in the number of ultra-deep wells, reaching a new milestone of 8,000 meters (26,247 feet). According to a 2022 study, this achievement has played a crucial role in advancing deep oil and gas exploration while strengthening the country’s market competitiveness.
Regardless, the company admitted to Xinhua that the newest avenue to extract oil and gas still poses significant challenges, including high temperatures, pressures, and increasingly complex conditions.
Clastic reservoirs, in tandem, are particularly complex geological systems according to GE Plan. Clastic rocks have a unique sedimentary profile. Xinhua continued that they have low permeability, thus making these fields difficult to find.
Should we dig deeper?
Despite the challenges, these environments are expected to shape the future of the oil and gas industry. However, companies will have to overcome technological, environmental, and regulatory roadblocks. Not only must they minimize adverse impacts, but they also have to continue creating the technology to extract resources safely and responsibly.
Nonetheless, China has made serious strides for the industry in identifying where these massive reserves are and demonstrating their potential. After all, 110 million tons is an impressive amount, a tremendous quantity of energy.