Case Study | Application of Microseismic Monitoring in Shale Gas Fracturing
Jun 06,2025
Operation overview and parameter design
Operation location: Hanzhong, Shaanxi
Operation task: microseismic crack monitoring
Operation time: 2024.1.10-2024.1.15
Weather conditions: sunny to cloudy
Operation equipment: Guowei UGL3C
Operation parameters: 120 4G node seismometers are evenly arranged above the fracturing section with a 200m grid
The first fracture was 212m long, 61m wide, 11m high, and 4.487e+06m^3 in transformation. Real-time monitoring of fracturing found that the event point first occurred near the wellbore, where the event points were dense, and then extended to both sides of the wellbore. The extension distances on the northeast and southwest sides were similar, and there were no other obvious abnormalities. The main event depth was -1070 to -1060m.
The second fracture was 196m long, 53m wide, 10m high, and 2.049e+06m^3 in transformation. Real-time monitoring of fracturing found that the event point first occurred near the wellbore, where the event points were relatively dense, and then extended to both sides of the wellbore. The extension distance on the north-south side was slightly smaller than that on the west-east side. There were no other obvious abnormalities. The main event depth was -1063 to -1052m.
The ground microseismic monitoring signal was clear and the energy was concentrated, so high-quality monitoring data of the underground fracture network was obtained. Through monitoring positioning and result analysis, high-precision parameters of the fracture network were obtained, and data such as fracture length, width, height and overall transformation volume were obtained, verifying the scientificity and effectiveness of the overall process of fracturing construction.
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