Project Title:High-Frequency Pressure Fracture Monitoring Technology and Its Applications 

Participating Enterprises:Anhui Jingshang Tianhua Technology Co., Ltd. ；Petrochina Zhejiang Oilfield Company

Award Received:Scientific and Technological Progress Award - Silver Award

Achievement Level: International Advanced Level

Project Number: ECF-2025-SET-1015

Main Participants: Ma Lijun, Huang Zhanwei, Jia Zhipeng, Zhao Hui, Wang Xiaorui, Li Honghong, Yu Jie, Zhou Ting, Huo Yifan, Wang Jiatong, Qi Binbin

Expert Review Comments:
International advanced level. This project innovatively developed high-frequency pressure fracture monitoring technology operating at the kilohertz level. It established wellhead high-frequency monitoring equipment, a dual-signal decoupling and collaborative inversion theory for wave-flow signals, and an intelligent cloud-based decision-making platform, enabling real-time monitoring and dynamic analysis throughout the entire fracturing process. This technology achieves high-resolution monitoring at a lower cost, significantly enhancing the accuracy and efficiency of fracturing evaluation and on-site decision-making. The technology has been successfully applied in oilfields such as Zhejiang, yielding substantial economic and social benefits. It provides an efficient and reliable new monitoring approach for unconventional oil and gas fracturing operations, demonstrating strong innovation, practicality, and scalability.

Main Innovations:

High-frequency pressure fracture monitoring technology renews the traditional "black box" fracturingconcept. By util izing kilohertz-level high-frequency monitoring, it achieves millisecond "listening" offracture dynamics, transforming fracturing firom an experiential "art" into a data-driven "science."Innovatively proposing the "wave-seepage dual-signal decoupling" theory, it enables collaborativeinversion of fracture geometric parameters and formation properties, achieving a leap from morphologicaldescription to performance quantification. Intelligent "monitoring-diagnosis-control" closed-loop system isestablished, advancing operations from static design to dynamic optimization and from post-job analysis toreal-time regulation, significantly enhancing operational precision and recovery rates.

Main Uses and Technical Principles:

High-Frequency Pressure Fracture Monitoring Technology utilizes millisecond-level, lkHz high-precisionpressure mon itoring instruments installed at the wellhead and a cloud-based monitoring-computingplatform. By apply ing water hammer wave cepstrum analysis theory and shut-in pressure decline seepagetheory, it enables comprehensive monitoring and analysis during large-scale multi-stage hydraulicfracturing and shut-in/flowback processes in oil and gas wells. This includes fracture in itiation, fracturegeometry, stimulation effectiveness, dynamic monitoring during shut-in, choke management optimizationduring flo wback, and production capacity analysis. The technology provides critical support for optimizingfracture design, adjusting diverting measures, improving shut-in strategies, and refining flowbackprotocols. It also helps prevent events such as casing deformation, bridge plug failure, screen-out duringsingle-well fracturing, and fracture interference during multi-well operations. Centered on the concept ofthe "transparent reservoir," this technology offers core technical support for the efficient development offractured oil and gas wells and serves as an important model for the integration of geological andengineering practices in unconventional natural gas development in China.

Technical Applications:

This technology has successfully applied the “Da'an Model” for transparent reservoir development in the Yu Xi Da'an Block of Zhejiang Oilfield, with nationwide implementation across 350 wells and nearly 4,000 fracturing stages. It achieves over 90% accuracy in diagnosing cluster injection into fractures, with tested shale gas production exceeding 300,000 cubic meters per day. Its calculated dynamic reservoir parameters align with actual production at over 95%, establishing China's first high-efficiency development model for deep shale gas at depths exceeding 4,500 meters using high-frequency pressure monitoring. Since 2021, this technology has been successfully applied across four major oil companies—CNPC, Sinopec, CNOOC, and Yanchang Petroleum—covering diverse reservoirs including shale, fractured-karst, tight sandstone, and volcanic rock; various hydrocarbon types such as tight oil/gas, shale oil/gas, and coalbed methane; and well types including vertical, horizontal, and deviated wells. The technology has been deployed in key fields including: Daqing Oilfield's Gulong, Pingye, and Xushen blocks; Southwest Oil and Gas Field's Chuanyu and Luzhou blocks; Shengli Oilfield's Dongying, Zibo, Dezhou, and Hasa blocks; Qinghai Oilfield's Yingye and Mangya blocks; Changqing Oilfield's Yulin, Qingyang, and Ordos blocks; Tuha Oilfield's Jimsar block; CNOOC's Bohai and South China Sea blocks; Yumen Oilfield's Huanqing Production Plant; Tarim Oilfield's Manshen, Tazhong, and Dabeibei Blocks; CNPC Coalbed Methane Corporation's Yan'an and Linfen Blocks; Liaoning Oilfield; Jidong Oilfield's Yulin Block; Dagang Oilfield's Guanye Block; Jilin Oilfield, etc. Successful application has enabled comprehensive and accurate data collection on field fracturing outcomes, supporting field operations through efficient data analysis and reporting. The application of high-frequency pressure fracturing technology has significantly enhanced the large-scale development benefits of unconventional oil and gas well fracturing and production enhancement. By integrating geological and engineering data, it provides robust support for field operations, indirectly boosting oil and gas field production while reducing costs, thereby achieving the economical and efficient development of fractured oil and gas wells.