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Leverage the core technology of wide-area electromagnetic methods to create high-quality geophysical exploration projects.
On November 8, 2023, Zhang Guangda, Secretary of the Party Branch, Chairman, and General Manager of the Geophysical Exploration Institute of Sichuan Resources Group, led a team to the 2023 Changning Shale Gas Field Wide-Field Electromagnetic Survey Project Office in Yibin City, Sichuan Province, to conduct a safety and quality inspection. The primary task of this project is to use the wide-field electromagnetic method—a core technology of the Institute—to detect the structural features of the hanging wall and footwall of Fault No. 1 in the Tiangongtang anticline, as well as the electrical property distribution characteristics of the Cambrian Qiongzhu Temple Formation shale gas target strata, thereby providing technical support for subsequently delineating the boundaries of favorable exploration areas.
During this period, Project Manager Liu Jinhui reported on the overall status of the project and provided a detailed introduction to the major geological structures in the work area as well as an analysis of the existing data characteristics of the target strata. He summarized the new challenges and issues faced by this wide-area electromagnetic survey project, including the target strata being located at depths of 5 to 7 kilometers, significant variations in burial depth, and a complex longitudinal electrical structure. Furthermore, he formulated targeted technical measures and experimental plans for tackling these challenges.
After gaining a detailed understanding of the project’s production status, Zhang Guangda emphasized:
First, the data acquisition work must be carried out strictly in accordance with established procedures and standards. A segmented, refined acquisition method should be adopted, and frequency tests should be conducted along survey lines that overlap with previously known borehole locations to determine the frequency response range of the target strata. Based on this, a targeted frequency design should be implemented for the main frequency band, and the acquisition frequency should be increased in critical frequency segments.
Second, taking previously completed wide-area projects as references and integrating relevant data such as seismic and well-log information, conduct a thorough analysis of the geological profile’s characteristics.
Third, we must firmly establish a strong sense of safety. Given that this project involves numerous field personnel, many vehicles, and an extensive operational front, it is essential to strengthen daily management effectively, promptly eliminate potential safety hazards, and ensure the safety of personnel, vehicles, equipment, and other assets—leaving nothing to chance.
Fourth, ensure comprehensive and coordinated management with clearly defined roles and responsibilities, transforming this project into a high-quality, highly efficient geophysical exploration masterpiece.
The Geophysical Exploration Institute of Sichuan Resources Group has pioneered another key area in the exploration of deep Cambrian shale gas using the wide-area electromagnetic method, providing robust technical support to facilitate the exploration and development of new shale gas formations in southern Sichuan’s deep strata. While successfully completing the project tasks, this work has also laid a solid foundation for subsequent steps such as sedimentary facies analysis and well placement planning.
Executive Producer | Zhang Guangda
Reviewed by | Zou Zhongping
Editor-in-charge | Zhou Huiying
Text | Wang Yuchen
Figure | Zhao Yi
Editor | Wen Han
Address: No. 39 Qinghua Road, Qingyang District, Chengdu City, Sichuan Province
Email: sczywty@163.com
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