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my country became the third country in the world to master this technology
Sinochem News Network News on July 12, CNOOC Research Institute Co.
, Ltd.
(hereinafter referred to as CNOOC Research Institute) announced to the public that the "domestic independent research and development" project supported by the national key research and development program "Ocean Gas Hydrate Trial Production Technology and Technology" project The sea trial mission of natural gas hydrate drilling and logging technology and equipment" has successfully completed sea trial operations in the South China Sea.
This move marks a significant progress in China's marine natural gas hydrate (flammable ice) drilling and logging technology
.
Mi Lijun, chairman of the CNOOC Research Institute, said that this sea trial operation has obtained high-quality logging data with the advantages of low cost and high efficiency, which verifies the reliability of domestically-made deepwater technology and equipment, and breaks China’s dependence on independent power.
The two records of marine hydrate drilling operation depth and operation water depth have provided a model for drilling and logging operations in shallow soft hydrate formations, and have accumulated valuable experience for the localization of natural gas hydrate technology and equipment
.
In June 2021, CNOOC Research Institute will support the national key research and development plan "Ocean Gas Hydrate Test Production Technology and Technology", relying on the domestically-made "Offshore Oil 708 Deepwater Engineering Survey Ship" and the domestically-made deepwater drilling system, a new generation of satellite Drilling and logging tools, carried out a two-week subsea wellsite survey, drilling operations, and logging while drilling operations of two hydrate evaluation wells in the predetermined sea area at a water depth of 1758 meters in the South China Sea.
All the natural gamma rays and resistivity were obtained.
First-hand data such as, acoustic wave, well diameter, well temperature, topography and geomorphology, etc.
, successfully completed the target task
.
Zhou Shouwei, an academician of the Chinese Academy of Engineering, said that the success of this sea trial has enabled CNOOC to have a complete set of localized technical levels and technologies for ship-drilling-logging-coring-online analysis and testing in the field of deepwater-ultra-deepwater gas hydrate drilling and sampling.
The ability to operate in the whole process marks that China has become the third country in the world to independently master this technology, and China's marine gas hydrate drilling and logging technology has entered a new era of domestic independence
.
It is understood that since 1995, CNOOC has continued to tackle basic theories and engineering problems of hydrates, carried out multiple rounds of comprehensive geological research and exploration work, and gradually established domestically-made drilling and drilling equipment based on the domestically-made “Offshore Oil 708 Deepwater Engineering Survey Ship”.
Logging system, and independently developed hydrate rope coring technology, deep-water shallow surface CPT coring tools and other supporting technologies through exploration and practice.
In 2019, natural gas hydrate core samples were harvested in the Qiongdongnan waters
.
Natural gas hydrate is one of the strategic resources with the most commercial development prospects.
In China, it mainly occurs on the seabed of the South China Sea at a depth of 800 meters.
It has stratigraphic non-diagenesis, strong heterogeneity, susceptibility to landslides and shallow gas risks, etc.
Special problems
.
For a long time, due to the lack of domestic drilling and logging technology and equipment for hydrates, foreign professionals and equipment can only be hired and rented at high prices to carry out operations
.
The natural gas hydrate resources in China's seas are about 80 billion tons of oil equivalent, and two hundred billion cubic meters of mineral deposits have been delineated after drilling and verification
.
China is also the first country in the world to obtain continuous and stable airflow from combustible ice in sea areas, and has achieved continuous and stable gas production for 60 days in the sea area, with a cumulative gas production volume of over 300,000 cubic meters, creating a world of continuous gas production time and total gas production.
Record