Research Article
A New Method for Fracturing Wells Reservoir Evaluation in Fractured Gas Reservoir
Table 1
The comprehensive comparison of various logging information.
| Logging information | Low angle fracture | High angle fracture |
| Full waveform logging | Longitudinal and transverse wave energy attenuation and shear wave attenuation are greater | Longitudinal wave energy has an obvious attenuation and subsequent wave interference | Acoustic variable density log | Longitudinal and transverse wave grey scale stripe becomes shallow, appearing as herringbone interference stripe | Interference fringes appear in the longitudinal and transverse wave | Dual laterolog | Appears as low resistivity and negative difference in the range of 10 to two thousand | Resistivity appears as positive anomalies about below the surrounding rock and it is around hundreds of ohm meters | Acoustic logging | Appears as high sonic differential time and cyclical jumping phenomenon | Not shown obviously | Dual laterolog | Not shown obviously | Sometimes it appears as rough borehole | Lithodensity log | peak anomaly and increase if there is barite mud | increase is not obvious with mud barite presence |
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