On April 8, 2023, the shale gas well Zi 201 deployed by PetroChina Southwest Oil and Gas Field Company in Neijiang, Sichuan obtained a stable daily gas production of 738,800 cubic meters in tests. High-yield industrial gas flow with commercial development value can be obtained by drilling rock formations.

This strategic breakthrough in Cambrian shale gas exploration has opened up a new frontier for large-scale shale gas reserves and production in the Sichuan Basin, marking that the exploration and development of shale gas in my country has changed from the Silurian to the Permian, Cambrian The blossoming of a hundred flowers has further consolidated the resource base and development confidence for the realization of China's shale revolution. It is of strategic significance to promote the construction of a national natural gas production capacity base of 100 billion cubic meters in the Sichuan-Chongqing region, stimulate regional economic and social development, and ensure my country's energy security.

PetroChina Southwest Oil and Gas Field Company began to carry out Cambrian shale gas exploration in the Sichuan Basin in 2009. Sexual scale development has not been broken through.

In order to find new areas for large-scale shale gas reserves and production, PetroChina Southwest Oil and Gas Field Company organized the implementation of Zi 201 well, overcoming construction difficulties such as well depth exceeding 6,600 meters, high formation temperature, and complex in-situ stress, and completed the well with high quality and efficiency. On April 8, under the condition that the wellhead pressure was stable at 47.80 MPa, the test obtained a stable daily gas production of 738,800 cubic meters and a calculated unobstructed flow rate of 1,648,900 cubic meters. High-yield industrial airflow for layer testing. It is preliminarily estimated that the recoverable reserves of a single well of Zi 201 exceed 170 million cubic meters, which can meet the gas demand of more than 1 million households for one year.

He Xiao, general manager of Southwest Oil and Gas Field Company, said that the actual drilling confirmed that the high-yield shale series reservoirs obtained in Well Zi 201 are thick, high-quality, and well-preserved. The amount of resources is nearly 2 trillion cubic meters. Well Zi 201 obtained high-yield commercial gas flow, marking that the Cambrian shale gas in the Sichuan Basin is about to enter a new stage of scale-effective development. It is another major strategic breakthrough in the Sichuan Basin after the major exploration discovery in the Wujiaping Formation in the Permian . In the next step, Southwest Oil and Gas Field Company will speed up the implementation of geological reserves, optimize process technology, evaluate development potential, and build the company's third shale gas field with reserves of one trillion yuan and production of ten billion yuan as soon as possible.

Southwest Oil and Gas Field Company is the earliest enterprise in China to explore and develop shale gas. In the past ten years, targeting at the Silurian Longmaxi Formation, my country’s first shale gas field with trillions of reserves and 10 billions of production has been successfully built in the Changning-Weiyuan block, and the construction of the second 10 billions of shale gas fields is being accelerated in the Luzhou block. At present, the cumulative production of shale gas has exceeded 60 billion cubic meters, reducing carbon dioxide emissions by 100 million tons, and has made important contributions to securing energy jobs, achieving double carbon goals, and economic and social development. Editor / Zhao E