Asia's deepest scientific drilling well completion 7018 meters
In Anda of Heilongjiang Province, the Songjing Second Well of the Songliao Basin, the deep-seated scientific drilling project, surpassed the intended target and completed the well successfully. This achievement has reached the international advanced level. It has reached international advanced level in deep drilling techniques and Cretaceous continental paleo-climate research.
Songke No.2 well started drilling on April 13, 2014. It lasted for more than four years and completed a drilling depth of 7,018 meters. It became the deepest drilling in the 22 years since the establishment of the deepest continental scientific drilling and International Continental Scientific Drilling Program (ICDP) implemented in Asian countries. . The project has achieved four major breakthroughs and progress in geological science and technology.
First, it created four world records for deep drilling technology and achieved two major breakthroughs. Created the world's longest record of 311mm long-term corona, and the longest four world records of three different calibers. For the first time in the world, R&D and successful application of technologies such as large borehole coring and well completion have been successfully applied. Successfully developed high-temperature drilling technology to create a new record for drilling at the highest domestic temperature (241°C).
The second is the discovery that the deep shale gas and geothermal energy in the Songliao Basin have good prospects for exploration and development. In the strata of the Shahezi Formation and the Huoshiling Formation (3,350 meters deep) in the deep fault depression of the basin, 43 layers of shale gas and gas anomalies were detected, with a cumulative thickness of 102 meters. Methane accounts for 86% of the average content of all hydrocarbon components. In the well depth of 4400-7018 meters, 150-240 degrees C hot dry rock mass and 2 layers of uranium-abnormal formation containing high radioactive elements were discovered.
Third, three important evidences have been obtained for the evolution of paleoclimate in the Cretaceous Terrestrial. For the first time in the world, fine-scale high resolution fine characterizations of the most complete and continuous continental strata in the Cretaceous (145 to 65 million years ago) have been achieved, and the Cretaceous terrestrial million to 100,000 years scale has been rebuilt for the first time. The history of climate change has revealed the important information that large-scale volcanic eruptions emit carbon dioxide and trigger violent fluctuations in terrestrial climate.
The fourth is to achieve three major developments in basic geological research. The “Golden Pillar” standard section of continental strata in the Songliao Basin was established, and a new mechanism for the evolution of intracontinental basins in the early-stage basement of the basin was established. The multi-period transgression event resulted in a more enriched organic matter in the basin. New understanding.