Newshot Well depth 5,770 meters: China's offshore ultra-deep natural gas exploration achieves breakthrough, test production of about 800,000 cubic meters of natural gas per day
IT之家 November 12 news, according to CCTV News today from CNOOC, China has obtained a high-yield oil and gas well in volcanic rock strata drilled in the central Bohai Sea area at a depth of more than 5,000 meters, with test production of about 800,000 cubic meters of natural gas per day, marking a major breakthrough in China's offshore ultra-deep natural gas exploration.
IT之家 learned from the report that the well is located in the central Bohai Sea area, with a well depth of 5,770 meters. During exploration, the well encountered a cumulative total of more than 120 meters of natural gas layers in volcanic rock strata, demonstrating broad exploration prospects in the offshore ultra-deep volcanic rock field.
Guo Tao, chief geologist of the Bohai Oil Research Institute of CNOOC Tianjin Company, introduced that the reservoir temperature of the well reaches 150 degrees Celsius and the formation pressure exceeds 80 megapascals. Facing harsh high-temperature and high-pressure formation conditions, multi-disciplinary collaborative research was carried out to maximize operational quality under complex geological conditions, ultimately completing the drilling operation and obtaining a high-yield natural gas flow.
In the field of offshore oil and gas exploration, formations buried deeper than 3,500 meters are usually called deep layers, and those deeper than 4,500 meters are called ultra-deep layers. The ultra-deep volcanic rocks in the Bohai Sea were formed by volcanic eruptions and have undergone multiple stages of tectonic transformation. They are tight in lithology and highly heterogeneous. Complex formations cannot be clearly identified, high-quality reservoirs cannot be accurately found, and hard formations cannot be drilled. These have long been world-class technical difficulties restricting exploration and development here.
The Bohai Sea area is an important natural gas production area in China and one of the important gas sources for natural gas supply in the Beijing-Tianjin-Hebei and Bohai Rim regions. The successful drilling of this well has opened a new zone for China's offshore ultra-deep natural gas exploration and is of great significance for accelerating the progress of ultra-deep exploration in the Bohai Sea, building a trillion-cubic-meter large gas area in the Bohai Sea, steadily advancing domestic oil and gas reserve and production growth, and ensuring stable regional natural gas supply.
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