A fracturing well monitoring system and method

By combining fiber optic sensor arrays and ground signal demodulation systems with orthogonal three-component fiber optic sensors and a sensitivity-enhancing skeleton design, the problem of full-process monitoring of fracturing wells was solved, achieving high-sensitivity and high-speed, high-capacity microseismic signal monitoring, and improving the sensitivity and data transmission capabilities of the monitoring system.

CN122169778APending Publication Date: 2026-06-09CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA NAT PETROLEUM CORP
Filing Date
2024-12-06
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing technologies are insufficient for real-time monitoring of the entire fracturing process, especially in complex well networks and long-distance monitoring where the ability to capture microseismic events is inadequate. Furthermore, distributed fiber optic monitoring, when deployed outside the casing, cannot determine the location of events, resulting in high costs and poor coupling.

Method used

By employing a fiber optic sensor array and a ground signal demodulation system, and through backscattered Rayleigh light signal demodulation, combined with orthogonal three-component fiber optic sensors and a sensitivity-enhancing skeleton design, high-sensitivity monitoring of microseismic information and high-speed, high-capacity data transmission are achieved.

Benefits of technology

It achieves high-sensitivity, directional monitoring of the entire fracturing well process, improves the ability to capture microseismic signals, reduces costs, and supports high-speed, high-capacity data transmission.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a fracturing well monitoring system and method, relates to the technical field of optical fiber logging, and comprises an optical fiber sensing array and a ground signal demodulation system; the ground signal demodulation system is used for transmitting an optical signal to the optical fiber sensor array arranged at a target position under a neighboring well of a fracturing well, wherein the fracturing well is a well being subjected to fracturing reconstruction; the ground signal demodulation system is used for receiving a changed back Rayleigh scattering light signal generated by the optical fiber in the optical fiber sensor array when the optical signal is transmitted to the optical fiber sensor array, demodulating and analyzing the received back Rayleigh scattering light signal, determining microseismic information at the target position, and determining a crack propagation law, fluid inflow characteristics and cluster effective opening rate of the fracturing well according to the microseismic information at the target position. The application can effectively monitor the crack propagation law, fluid inflow characteristics and cluster effective opening rate of the fracturing well.
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