High-yield shale oil Wells were obtained in Sichuan Chongqing area

Recently, well Ping An 1, a risky exploration well deployed by Daqing Oilfield in Sichuan Chongqing region, has been tested with a high-yielding oil flow of more than 100 cubic meters of oil 100,000 cubic meters of gas, reaching a daily output of 112.8 cubic meters of oil 114,500 cubic meters of gas. The development of shale oil gas resources has become a new opportunity to revitalize Daqing Oilfield.

Since 2017, Daqing Oilfield has successively obtained the mining rights of four blocks of Southwest Oil Gas Company, namely Hechuan-Tongnan, Xichang - Xide, Yilong - Yingshan Pyeongchang-Wanyuan, through the reform of mining right block transfer. The Ping An 1 well, which obtained high oil flow, is located in the Pyeongchang structural belt of the low-slow tectonic area in the northeast Sichuan Basin. The drilling was started on December 27, 2019 completed on November 12, 2020. The drilling depth was 3980 meters the horizontal section was 817 meters long. The first well in Liangshan Formation of Jurassic to obtain high oil flow.

In recent years, driven by policies, China's shale oil gas development ushered in a rapid growth. Sichuan, Chongqing other provinces, as the main concentration of shale gas fields in China, have gathered a number of oil gas companies. Under PetroChina, there are Southwest Oil Gas Field in Sichuan Basin, Zhejiang Oilfield Daqing Oilfield. In terms of Sinopec, in addition to Southwest Petroleum Bureau, there are Jianghan Oilfield, Zhongyuan Oilfield East China Oil Gas Company. In addition, a number of private oil service engineering equipment enterprises have also mobilized resources to participate in the "battle" in Sichuan Basin.

China's conventional oil gas resources are characterized by "lean oil less gas", but the recoverable shale gas resources rank first in the world. According to the statistics of the Ministry of Natural Resources, China's new proven geological reserves of shale gas reached 764.424 billion cubic meters in 2019, up 513.1% year on year. The new reserves come PetroChina's Changning, Weiyuan Sun shale fields in the Sichuan Basin, Sinopec's Yongchuan shale field in the Sichuan Basin. The newly added proven geological reserves of PetroChina's three shale gas fields each exceeded 100 billion cubic meters. Data show that China's shale gas production exceeded 10 billion cubic meters for the first time in 2018, reached 20.04 billion cubic meters in 2020, increasing by 4.5 times during the 13th Five-Year Plan period just passed. Shale gas accounted for more than 10% of domestic natural gas, becoming the main force of domestic natural gas production.

Different Marine shale oil in North America, shale oil resources in China mainly belong to continental shale oil. In comparison, the exploration development conditions of continental shale oil are more complex the technology is more difficult. There is no successful experience large-scale commercialization cases that can be directly replicated at home abroad. Therefore, it is necessary to combine various forces to continuously tackle the key problems further strengthen the in-depth cooperation at home abroad.

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Source: International Petroleum Network