Here is placeholder text.
The geophysical exploration institute’s Chongqing shale gas wide-area exploration project has successfully passed the field completion acceptance with high standards.
On May 25, 2022, the project “Comprehensive Analysis of the Causes of Low Resistivity in the Longmaxi to Wufeng Formation at Well Area Jiangye-1 in the Western Chongqing Block,” undertaken by the Institute of Geophysical Exploration, successfully passed the field completion acceptance.
The owner’s organization convened a team of relevant experts to form an acceptance inspection group. The inspection group first carefully examined the on-site power supply for the wide-area electromagnetic method’s field transmitter station, the site where the AB electrodes were deployed, and the site where data from the receiver stations were collected in real time. They gained a thorough understanding of the project’s field work implementation plan, data quality control methods, safety assurance measures, and emergency response procedures, and gave high praise to the project’s field production operations.
Subsequently, the project team conducted a field completion acceptance report, providing a detailed account of the completion status of field work, data quality, and HSE management. After carefully reviewing the reports and original records and listening to the project team’s presentation, the acceptance committee concluded that the project had laid a solid foundation in its fieldwork, with a 100% compliance rate for data collection and a first-class product rate of 92.48%. The quality of the collected data exceeded both the standard specifications and design requirements. Moreover, the HSE management was rigorous and meticulous, ensuring that the field data collection tasks were completed with high quality in accordance with the contract and design specifications. The committee unanimously agreed to pass the field completion acceptance.
This project employs the wide-area electromagnetic method—the recipient of the National First-Class Award for Technological Invention—as its working methodology. Its objective is to characterize the electrical properties of the target strata, namely the Longmaxi and Wufeng formations, comprehensively analyze the factors influencing low resistivity, and explore their correlation with resistivity, thereby reducing exploration risks. As a leading electromagnetic exploration technique in China, the wide-area electromagnetic method inherits the advantage of the CSAMT method—using artificial field sources to overcome the randomness of natural field sources—and also retains the benefit of the MELOS method, which enables measurements in non-far-field conditions. By overcoming the disadvantage of weak far-field signals inherent in the CSAMT method, this approach expands the observation range of artificial-source electromagnetic methods, enhancing observation speed, accuracy, and fieldwork efficiency. The combination of the wide-area electromagnetic method and the pseudo-random signal electrical method has given rise to a uniquely distinctive new electrical exploration technique capable of reaching detection depths of up to 8 kilometers. This method has already been successfully applied in exploration and evaluation efforts at multiple oil and gas fields across China. The current project will further optimize the assessment of shale gas production capacity in the western Chongqing block.
The project owner’s leadership has given full affirmation to this project and highly praised the work of the Geophysical Exploration Institute. They expressed the hope that the Institute will further leverage the existing data from Well Jiangye Tan 1 in the subsequent data processing, interpretation, and comprehensive analysis stages. At the same time, the Institute should integrate data from the neighboring Luzhou area to conduct an in-depth analysis of the causes behind low resistivity, summarize the patterns governing the formation of low resistivity, and focus on clarifying the resistivity characteristics of the target strata in the Guangpu Syncline region in the north, striving to achieve breakthroughs in that area.
Executive Producer | Zhang Guangda
Reviewed by | Zou Zhongping
Editor-in-charge | Zhou Huiying
Text | Liu Jinhui
Figure | Jia Jianchao, Chen Jie
Editor | Wen Han
Address: No. 39 Qinghua Road, Qingyang District, Chengdu City, Sichuan Province
Email: sczywty@163.com
Quick Navigation
Follow us
No data
Copyright © 2025 Sichuan Provincial Natural Resources Investment Group Geophysical Exploration Institute Co., Ltd.
Business license
Powered by：CEglobal