A kind of mud shale brittleness index Forecasting Methodology

The invention provides a kind of mud shale brittleness index Forecasting Methodology, belong to oil and gas exploration field.This method includes: (1) geology, well logging, geological data prepare；(2) ratio of cubage brittle mineral content and total mineral content of the quartz in mud shale rock forming mineral component analysis data, clay, carbonate rock, i.e. rock ore deposit brittleness index are utilized；(3) velocity of longitudinal wave in dipole acoustic logging data, shear wave velocity, density curve is utilized to calculate rock-mechanics property parameter；(4) multivariate regression models between rock ore deposit brittleness index curve and rock-mechanics property parameter curve is set up in position, well point；(5) carry out prestack inversion and obtain velocity of longitudinal wave, shear wave velocity and density data body, then calculate rock-mechanics property supplemental characteristic body；(6) utilize multivariate regression models that step (4) obtains and the rock-mechanics property supplemental characteristic body that step (5) obtains, be calculated brittleness index data volume.