On February 25th, CNOOC announced that it is located in the Jizhong 19-6 gas field in the Bozhong sag in the Bohai Sea area of ​​China. It has obtained high-quality and high-yield oil gas flow and determined that the proven natural gas reserves of the natural gas exceed 100 million yen.
100,000,000,000 square?
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Just sneak a few 0 friends, please raise your hand, Xiaobian to tell you. It is a hundred billion party!
It can be used by residents of a million people in cities for hundreds of years. If it is all on the ground, the volume of 15,000 Bird's Nest stadiums is “10w+†water cubes. This is the largest oil and gas discovery in the Bohai Bay Basin in 50 years.
Bohai Oilfield Gas Field Development Timeline
Looking for oil and gas in the "broken dishes"?
Bohai Oilfield is located in the hinterland of Beijing, Tianjin and Hebei. Although it is the second largest crude oil production base in China, due to the complicated geological structure, the exploration reserves in the past 50 years are mainly crude oil, and few natural gas is found.
What is this? Due to the crisscrossing of the Tanlu fault and its secondary faults throughout the eastern region, the geological structure of the Bohai Oilfield is like a “broken plate and stepped on a few feetâ€. It is even more difficult to construct a complex and easy to escape “natural gasâ€. Searching for traces is even more difficult.
4000 meters 200 degrees 40 MPa?
The world is material, the material is moving, and the movement is regular. Since the 11th Five-Year Plan, China has started a "natural gas conference war" in the Bohai Oilfield, and a joint research approach of "production, learning, and research". Researchers rack their brains, looking for patterns, and smelling the treasures between the clues. By clarifying the genetic mechanism of the three-dimensional network of the lithologic-stress-fluid ternary common control ancient metamorphic rocks, it is clear that the Archean low-lying hill trap group is the most favorable place for large-scale accumulation of natural gas.
However, this "trap" is 4,000 meters underground, where the temperature is as high as 200 degrees and the pressure is 40 MPa. The indestructible drill pipe is below and becomes a noodle.
What should I do? Open the road every mountain, encounter the water bridge.
According to the characteristics of the formation, the optimal drill bit system is established. Through the simulation of hundreds of times, the optimal drill design is determined, and the speed and depth of drilling the buried hill formation are doubled. The first high-temperature solid-free drilling fluid system in China is guaranteed to ensure 210 °C. The good performance of "drilling blood" at high temperature breaks the monopoly of foreign technology in one fell swoop;
Create an abnormal pressure drilling decision system based on big data, and scan any traces of abnormal pressure to ensure safe operation;
According to the pressure data, the well structure is continuously optimized, which finally makes the wellbore “slimâ€, saves materials and saves operating costs;
......
A series of high-tech technologies that allow natural gas to break out of the water.
good news
The construction of the 19-6 gas field test area in Suizhong has started. The Bozhong Sea area is only one hundred kilometers away from the Beijing-Tianjin-Hebei region. After development, it can directly use existing natural gas pipelines to enter the market. In the winter of 2017, the chilly radiator in North China, which is lacking in air, is still fresh in memory. The discovery of the atmospheric field will not be cold in the next winter.
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