China successfully developed 100,000 old oil well recovery
In the past eight years, through the integration of information technology and oil recovery techniques, China has successfully developed a smart oil rig specifically designed for the redevelopment and utilization of "low-yield, low-permeability, low-pressure" reservoirs. This innovation has brought about a new era for approximately 100,000 old oil wells across the country, giving them a "second spring."
On December 13, Huazhong University of Science and Technology announced that Professor Chen Xuedong from the State Key Laboratory of Digital Manufacturing Equipment and Technology, in collaboration with Suzhou Dayi Equipment Technology Co., Ltd., launched a groundbreaking smart oil rig tailored for these challenging reservoirs.
According to Zeng Xingqi, a senior expert in oil and gas field development and vice chairman of the Institute of Management Science at the Chinese Academy of Sciences, the intelligent oil rig represents a significant advancement over traditional equipment. By utilizing advanced design and information technology, it can monitor underground conditions in real time, leading to improved economic returns and environmental benefits.
Chen Xuedong's team has developed a system capable of automatically creating an optimal working plan and adapting to three key functions: oil recovery, logging, and sand mining. The technology has been patented, with 18 invention patent applications submitted, 4 authorized, and 11 published, forming a comprehensive patent protection network.
Xiao Wensheng, director of the Technical Committee of the China National Oil Production Equipment Engineering Technology Center, emphasized that the intelligent oil rig is crucial for the development of "three lows" reservoirs, filling a critical gap in modern oil production technology.
Yanchang Oilfield in Shaanxi Province, which has a century-long history, is a typical example of such low-yield, low-permeability, and low-pressure oil fields. In March 2012, well No. 2038 was completely non-producing due to no liquid flow, requiring 10 workovers.
On September 1, 2012, the Chen Xuedong team installed the smart oil rig at well No. 2038 for testing. After 60 hours of operation, the well was successfully unblocked and resumed production. This achievement transformed a "dead well" into a "living well," achieving increased production, energy savings, and environmental protection.
Experts estimate that China’s three major oil companies—PetroChina, Sinopec, and Yanchang Oilfield—have tens of thousands of similar wells. Currently, there are around 100,000 underperforming or low-production wells. Moreover, over 60% of newly discovered oil reserves in China are low-permeability fields, making the promotion of smart oil rigs increasingly important.
Wan Renqi, a resource expert at China National Petroleum Corporation, highlighted the potential impact of this technology. He noted that about 70% of crude oil in already developed fields remains untapped. Increasing the recovery rate by just 1% could lead to an additional 200 million tons of crude oil production, offering significant economic and strategic value.
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