According to Xinhua News Agency, China National Petroleum Corporation's Changqing Oilfield announced on November 9 that its cumulative shale oil production has exceeded 20 million tons, marking a new phase of large-scale, profitable development for China's terrestrial shale oil resources.

The shale oil reserves developed by Changqing Oilfield in the Ordos Basin lie buried at depths exceeding 2,000 meters underground. With reservoir pressures far below conventional oil reservoirs, natural energy cannot drive extraction. Furthermore, the reservoir permeability is only one-thousandth that of conventional oilfields, making effective extraction challenging with conventional technologies.

Facing these technical challenges, Changqing Oilfield has pioneered artificial pathways through fracturing in tight reservoirs. By injecting energy carriers at high pressure to activate the reservoir, it has established efficient flow channels for enhanced development.

Through breakthroughs in a series of core technologies, Changqing Oilfield has continuously improved shale oil recovery rates. It independently developed 12 key core technologies, including soluble metal ball seats and multifunctional fracturing fluids, achieving technological self-reliance and control. By applying the green and efficient CO₂ enhanced oil recovery technology, it boosted single-well daily production from 1.5 tons to 18 tons, with overall technology reaching internationally advanced levels.

Changqing Oilfield has established a major domestic shale oil production zone in the Ordos Basin, providing insights and practical experience for the large-scale, profitable development of China's shale oil resources. It took 12 years for Changqing Oilfield to accumulate 10 million tons of shale oil production from the start of technological research, but only 3 years to climb from 10 million tons to 20 million tons.

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