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In order to systematically evaluate the scale and morphology of hydraulic fractures in the Ma131 demonstration area, microseismic interpretation methods and core analysis were combined to identify the fractures. Methods: The consistency between the core-interpreted fractures and the microseismic monitoring fractures was quantitatively analyzed from the aspects of fracture density, mechanical properties and fracture occurrence of the large-slope coring well MaJ02 and microseismic monitoring. Conclusions: The proportion of shear and tensile fractures identified by microseismic energy. In the early stage of hydraulic fracturing, most of the fracturing sections are dominated by shear fractures and the magnitude of shear fractures is large, the shear type events appear at the front end of fracture extension. The results of the calculation and statistical analysis of the fracture length, fracture width, fracture height, fracture strike, fracture effective modification volume (SRV), number of microseismic events and fracture complexity index of 12 wells show that the fracture height of the Ma 131 platform is between 15 and 30 m, which is greater than the interlayer interval of 13–20 m, and the interlayer transformation of the reservoir is relatively sufficient, and the fracture complexity index based on the microseismic monitoring and positioning results is concentrated in the range of 0–1.5, indicating that the artificial fractures are mainly single-fractured. Innovations: The height and SRV showed a good positive correlation with the single-stage fluid volume, but the correlation with the sand volume was poor, the fracture parameters of the two-cluster and three-cluster fracturing were basically the same, the fracture width of the six-cluster fracturing was slightly greater than that of the three-cluster fracturing, and the fracture height was slightly less than that of the three-cluster fracturing, the scale of temporary plugging and flow-limiting fracturing were similar, and the transformation effect was basically the same.

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Microseismic Interpretation of Hydraulic Fractures with Core Calibration Applied in Mahu

  • 会议论文

  • 发表日期：

    2025年

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  • Jing Zhang,
  • Tao Wan,
  • Yan Dong,
  • Long Tan

摘要

In order to systematically evaluate the scale and morphology of hydraulic fractures in the Ma131 demonstration area, microseismic interpretation methods and core analysis were combined to identify the fractures. Methods: The consistency between the core-interpreted fractures and the microseismic monitoring fractures was quantitatively analyzed from the aspects of fracture density, mechanical properties and fracture occurrence of the large-slope coring well MaJ02 and microseismic monitoring. Conclusions: The proportion of shear and tensile fractures identified by microseismic energy. In the early stage of hydraulic fracturing, most of the fracturing sections are dominated by shear fractures and the magnitude of shear fractures is large, the shear type events appear at the front end of fracture extension. The results of the calculation and statistical analysis of the fracture length, fracture width, fracture height, fracture strike, fracture effective modification volume (SRV), number of microseismic events and fracture complexity index of 12 wells show that the fracture height of the Ma 131 platform is between 15 and 30 m, which is greater than the interlayer interval of 13–20 m, and the interlayer transformation of the reservoir is relatively sufficient, and the fracture complexity index based on the microseismic monitoring and positioning results is concentrated in the range of 0–1.5, indicating that the artificial fractures are mainly single-fractured. Innovations: The height and SRV showed a good positive correlation with the single-stage fluid volume, but the correlation with the sand volume was poor, the fracture parameters of the two-cluster and three-cluster fracturing were basically the same, the fracture width of the six-cluster fracturing was slightly greater than that of the three-cluster fracturing, and the fracture height was slightly less than that of the three-cluster fracturing, the scale of temporary plugging and flow-limiting fracturing were similar, and the transformation effect was basically the same.