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China's first super deepwater exploration well to test the success of the South China Sea

China's first super deepwater exploration well to test the success of the South China Sea

  • Categories:Industry News
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  • Time of issue:2020-03-31 14:57
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China's first super deepwater exploration well to test the success of the South China Sea

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2020-03-31 14:57
  • Views:
Information
China National Offshore Oil Corporation 2, announced that the first deep wells in China's first super deep wells Lingshui 18-1-1 wells successfully implemented the test operation, which indicates that China has a deep offshore drilling and testing full capacity.
Yang Hua, chairman of the China National Offshore Oil Corporation, said the success of the Lingshui 18-1-1 well, it was a major breakthrough in the exploration of Lingshui 17-2 and Lingshui 25-1 after 2014.
Lingshui 18-1-1 wells is located in the South China Sea in the Qiongdongnan Basin a wildcat well, the actual operating depth of 1688.7 meters, the actual drilling depth of 2927 meters, which belongs to the category of ultra deep wells.
The concept of deep water in the world is evolving with the development of deep water exploration technology. At present, from the surface to the seabed to reach 500 meters above the vertical distance can be called deep water, 1500 meters above the depth of the deep water. Deep water, especially the ultra deep water, has become an important area to take over the world oil and gas exploration and development in recent years.
This test operation is the first challenge in the sea oil deep water test. CNOOC, deputy chief engineer of the South China Sea Oil Management Bureau, said Li Zhong, compared with the conventional deep well testing, ultra deep well testing is more difficult. Is mainly reflected in three aspects: one is 500 meters below sea level to the bottom of the sea, temperature is 2 DEG to 5 DEG between components of oil and gas at low temperature is very easy to form hydrate, which caused the test tube and water under well control system paralysis, security risk; two is the wells reservoir shallow stratum thinning loose sand, extremely easily, the discharge in the course of oil and gas, the flow of sand like sand on the whole process of marine erosion, easily lead to gas leakage, serious and even cause fire and explosion; three is the ultra deep ocean environment is complex, in the flow of such sudden sea conditions exist, easily lead to the loss of the platform that caused disruption to operations and equipment damage.
Aiming at the problem of hydrate, the researchers have developed a water - based testing solution for the water - based testing of the deep water, which can prevent the formation of the hydrate in the test. In order to solve the ultra deep wells loose sand reservoir with risk, the application of precision screen and the ground spin researchers out of sand controlling measures correlated with each other, and with the help of ground anti process real-time monitoring system of sand sand, reduce the harm brought by taking all the geological material. In addition, the emergency relief decision-making system and node control plan, which is also developed during the testing period, can ensure the safety and smooth operation of the ultra deep water test.
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