The application discloses a deep
coal bed gas reservoir high
brittleness sweet spot area prediction method,
system and equipment, relates to the oil and gas and
coal bed gas geophysical exploration field, and the method comprises the steps of: taking
dynamic elastic modulus as the independent variable, taking
coal bed fracture pressure as the dependent variable, adopting a multiple
linear regression method to perform fitting, determining a partial regression coefficient, and thereby constructing a
brittleness index model; based on
original data of a target area deep coal bed gas reservoir, adopting
prestack simultaneous inversion technology and rock physical formula to perform inversion and calculation, obtaining a three-dimensional dynamic Young's modulus data body, a three-dimensional dynamic Poisson's ratio data body and a three-dimensional dynamic
shear modulus data body, and substituting into the
brittleness index model to obtain a three-dimensional brittleness index data body; according to a brittleness index threshold, dividing a region corresponding to the three-dimensional brittleness index data body to determine a high brittleness
sweet spot area. The application can improve the accuracy of predicting the high brittleness
sweet spot area of the deep coal bed gas reservoir.