In the near future, the southwest oil and gas field of CNPC issued a plan for the completion of a super oil and gas field with 50 million tons of oil and gas equivalent in 2035 and a stable production of 20 years. In the plan of the China Petroleum Changqing Oilfield, 50 million tons of stable production will still be achieved in 2035, and the target of stabilizing production for 20 years is finally achieved. A first major oil and gas fields Chinese long-term contest, is Changqing and southwest of the two major oil and gas field expansion. And the protagonist of this contest is the natural gas that is in great favor. Look at a set of contrast data first. In 2017, the annual oil and gas equivalent of Changqing Oilfield reached 53 million 156 thousand and 800 tons, of which 23 million 720 thousand tons of crude oil and 36 billion 900 million cubic meters of natural gas. At present, Changqing Oilfield has been 5 consecutive years of steady production of 50 million tons, and 6 consecutive years ranked first China large oil and gas fields. In 2017, the gas production of Southwest Oil and gas field was 21 billion 20 million cubic meters, up 2 billion 17 million cubic meters, and oil and gas equivalent of about about 16800000 tons. According to the ranking of oil and gas equivalents, the southwest oil and gas field can only be regarded as the sixth largest oil field in China, and there are several large mountains such as Changqing, Daqing, Bohai, Tarim, Shengli and so on. According to the production of natural gas, southwest oil and gas field in Changqing Oilfield (21 billion) (36 billion 940 million) and (25 billion 300 million) of Tarim Oilfield, China behind the third largest natural gas field. However, in the context of the development of natural gas and the vision of PetroChina's "oil and gas sharing the world", the goal of Southwest Oil and gas field is no longer the sixth largest oil field or the third largest natural gas field. In order to achieve this goal, the southwest oil and gas field of CNPC has set up the overall strategic deployment of the three step: The first step is to build up a total of 30 billion cubic meters of gas producing strategic area in 2020. The oil and gas equivalents reach 25 million tons or more. Shale gas production reaches 10 billion cubic meters, and gas field development and management level is leading in China. The second step is to build the largest modern natural gas industrial base in China in 2035. The core technology and independent innovation capacity is the leading domestic product. The output of natural gas reaches 70 billion cubic meters, and the oil and gas equivalents exceed 50 million tons, of which shale gas output reaches 40 billion cubic meters. The third step is that by the middle of this century, the growth pole of PetroChina will be more stable, and the oil and gas equivalents should be maintained for over 50 million tons and stable for 20 years. The scale strength, core competitiveness and innovation and efficiency will remain the leading and world-class in China. As the six years when the first oil field of Changqing Oilfield, also has the strategic goal of powerful, and identified two stages of the implementation schedule: The first stage is the time from 2018 to 2020, based on 50 million tons has been sustained and stable for 5 years, the full realization of the "13th Five-Year" planning objectives. The second stage is from 2021 to 2035, with 50 million tons more stable for 15 years and more than 20 years. According to the current situation and future development plan of the southwest oil and gas field and Changqing Oilfield, we combine the Tarim oilfield data to obtain the following curve. It can be seen that, according to the planning of the southwest oil and gas field and Changqing Oilfield, the position of the first major oil field in Changqing Oilfield is still very reliable in a long period of time. However, with the southwest oil and gas field oil and gas production exceeded 50 million tons, and continuous stable production for 20 years in 2035, who is the first large oil and gas fields it is hard to say. On one side is a new oil and gas field that has just reached 50 million tons, on one side is a super oil field that has been steadily producing 50 million tons and 20 years. After all, the stable production of 20 years has been a miracle, if the stable production of 20 years is a miracle in the miracle! However, although the plan is so, how the actual situation can not be fully controlled. Moreover, 20 years and 40 years later, the situation of the whole oil industry is not yet known...