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Make good use of core technologies to support oil and gas exploration and production.
In the first quarter of 2024, the Geophysical Exploration Institute has been steadily advancing its wide-area electromagnetic fracturing monitoring work in the Sichuan-Chongqing region. Currently, seven platforms have been successfully launched, with monitoring already completed at four wells and ongoing at nine wells.
The wide-area electromagnetic fracturing monitoring project in the Sichuan-Chongqing region is a key initiative jointly implemented by the “Gu Zhiwen Science and Technology Innovation Studio” of the Institute of Geophysical Exploration and Jishan High-Tech. It represents the practical application and transformation of wide-area electromagnetic fracturing monitoring—a core technology currently unique in China—into oil and gas well fracturing development. This cutting-edge technology was developed specifically to address the challenges posed by traditional fracturing monitoring methods, which fail to provide an intuitive visualization of how injected fracturing fluids move, spread, and affect underground formations.
Since the project’s implementation, the project team has been rigorously managing its safety and quality standardization system in the widely dispersed and geographically extensive construction areas, strictly adhering to CNPC’s QHSE standards. We have maintained stringent controls over safety and quality, ensuring that every step—from field monitoring data collection to indoor data processing, interpretation, and map generation—is carried out precisely in accordance with the design specifications and relevant standards. We have successfully completed the design work and all tasks assigned by the client.
First, we provide real-time guidance for on-site fracturing operations, offering recommendations on temporary plugging and the risk of crossflow during fracturing. This helps improve fracturing efficiency, reduce construction costs, and minimize environmental impacts.
Second, based on monitoring results, we conduct research and analysis in multiple aspects, including evaluation of the fracturing fluid’s sweep area and sweep length, optimization of well spacing, analysis of fluid usage intensity, cluster spacing analysis, stage length analysis, evaluation of areas undergoing repeated stimulation, assessment of cluster perforation utilization, evaluation of temporary plugging effectiveness, verification of the rationality of fluid usage intensity, assessment of the impact of natural fractures, evaluation of the impact on reservoir properties, and tracking of post-fracturing production.
During the production phase of oil and gas field development, the wide-area electromagnetic fracturing monitoring effort has improved and advanced its core technology to the second-generation monitoring system. By upgrading instrumentation and software capabilities, the receivers’ sensitivity, accuracy, and number of channels have been enhanced, yielding even more refined results. Currently, the system is capable of simultaneously receiving data from up to 48 channels per receiver and over a hundred channels per well.
Currently, the Geophysical Exploration Institute is equipped with 40 sets of monitoring devices, enabling it to simultaneously carry out fracture monitoring tasks at up to 10 platforms. This capability provides strong support for optimizing fracturing parameters in shale gas, tight sandstone gas, and coalbed methane operations in the Sichuan Basin, as well as for enhancing oil and gas exploration and production. It also contributes the resource geophysical expertise of Sichuan to the joint effort between Sichuan and Chongqing in building “Qidong,” a major gas-producing region.
Executive Producer | Zhang Guangda
Reviewed by | Zou Zhongping
Editor-in-charge | Zhou Huiying
Text | Wang Qiang
Figure | Project Department
Editor | Wen Han
Address: No. 39 Qinghua Road, Qingyang District, Chengdu City, Sichuan Province
Email: sczywty@163.com
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