Earthquake prediction and description method of highly-shielded fracture-vug type storage layer containing coal

• Main Authors: ZHANG ZAIJIN, LI JUN, CHEN YEQUAN, JI YUXIN, XIAO WEN, FAN TENGTENG, ZHANG HONG, ZHANG JUNHUA, DONG NING, LI YUHANG
• Format: Patent
• Language: English
• Published: 06.01.2016
• Subjects: DETECTING MASSES OR OBJECTS; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; PHYSICS; TESTING

The invention discloses an earthquake prediction and description method of a highly-shielded fracture-vug type storage layer containing coal, and the earthquake prediction and description method is mainly used for earthquake resource target processing and fine description of the storage layer. The method comprises the steps of: firstly analyzing coal layer characteristics through forward modeling, and providing basis for positioning of practical resource coal layers; then utilizing generalized S conversion time varying wavelet spectral simulation to improve the resolution of a target layer; then utilizing a layer position control multi-channel dynamic matching tracking method for carrying out highly-shielded stripping, and protruding weak signals; and finally utilizing a crack detection method, absorption attenuation analysis and wave impedance inversion to carry out contrast analysis, and obtaining a storage layer prediction result. The earthquake prediction and description method can well solve the problems that cracks are difficult to identify, the fracture-vug type storage layer is high in transverse heterogeneity, and the storage layer is low in porosity and low in permeability; in addition, the storage layer prediction precision is improved.