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A snowy winter heralds a bountiful harvest—Geophysical Exploration Company kicks off the new year with a strong start.
On February 7, 2022—the seventh day of the Chinese New Year—while most people were still immersed in the festive atmosphere of the Spring Festival, the electromagnetic monitoring project for shale gas fracturing at Wells Ning 209H72-2 and 3, operated by the Geophysical Exploration Company, officially resumed operations after being refreshed by a spring snowfall, commencing the electromagnetic monitoring of the fracturing process.
This project marks the fourth platform undertaken by the geophysical exploration company in the Changning shale gas block—the sixth and seventh well fracturing electromagnetic monitoring missions in the Changning block. A total of three survey lines have been laid out, with a combined length of 9,750 meters and a total of 9,780 measurement points. This represents the largest single monitoring workload ever handled by the geophysical exploration company in the Changning shale gas block since it began conducting fracturing electromagnetic monitoring there. The project area features dense surface vegetation and significant topographic variations; within the 3,200-meter-long survey lines, the elevation difference reaches as much as 600 meters, with altitudes ranging from 900 to 1,500 meters. Since entering the site on November 23, 2021, the team has experienced four major snowstorms.
The fracturing monitoring technology on this platform has achieved new highlights and breakthroughs at the technical level compared to previous approaches. A more sophisticated, wide-area electromagnetic fracturing monitoring and evaluation system has been established. Based on the results of fracturing monitoring, this system integrates geological and engineering parameters for comprehensive analysis, enabling holistic and integrated management and evaluation that covers a wide range of aspects—including assessment of fracturing effectiveness, identification of geological influencing factors, evaluation of fracturing process appropriateness and development scheme rationality, as well as post-fracturing production forecasting. Compared to earlier methods, this system has yielded richer results and provides more timely, field-specific guidance. It offers robust support for pre-fracturing simulations and scheme optimization, refined analysis of fracturing operations during the fracturing process, post-fracturing evaluations for individual wells, and thorough follow-up and summarization of single-well fracturing activities.
The wide-area electromagnetic fracturing monitoring technology is the third service offered by the geophysical exploration company since it began serving the Changning shale gas block—following its comprehensive pre-drilling surveys using the “3+2” drilling platform and wide-area electromagnetic exploration. This method leverages the “underground conductor antenna effect” to conduct real-time electromagnetic monitoring during the platform’s fracturing operations. By processing and mapping the monitoring data, it enables interpretation of the fracture fluid distribution and provides timely technical support for the platform’s fracturing operations. The implementation of this project represents a vivid practice through which the geophysical exploration company is putting into action Sichuan Province’s 14th Five-Year Plan, responding to the initiative of building the Chengdu-Chongqing Twin-City Economic Circle, and contributing to the development of China’s “Gas Daqing.”
The 2022 Spring Festival was a rainy one, with continuous days of overcast and drizzly weather. In the area where the project is located, rain was falling at the foot of the mountains, while snowflakes were swirling high up in the mountains. Yet just as the platform resumed work and pressure began to build, the clouds suddenly parted, and the sun burst forth brilliantly. The long-awaited sunshine poured down onto the snow-white landscape, instantly filling the scene with dazzling radiance and an atmosphere of peace and harmony. As the saying goes, “A blessed snow foretells a bountiful year,” and this perfectly foreshadowed a stellar start for the geophysical exploration company in the new year.
Executive Producer | Zhang Guangda
Reviewed by | Zhou Huiying
Text | Wang Qiang
Figure | Wang Qiang, Liu Xianhai
Editor | Wen Han
Address: No. 39 Qinghua Road, Qingyang District, Chengdu City, Sichuan Province
Email: sczywty@163.com
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