FRACKING METHOD AT FRACKING INTERVALS OF A HORIZONTAL DRILLING ZONE IN A SWEET SPOT RANGE DETERMINED BASED ON MEASUREMENTS OF RESISTIVITY AND DENSITY IN THE HORIZONTAL DRILLING ZONE

摘要

The present invention relates to a method of estimating slowness, Young's modulus, Poisson's ratio, brittleness, and the reserve amount of gas of a horizontal drilling zone in a sweet spot range at a shale gas play using resistivity and density logging data, and a method of determining fracking intervals of the horizontal drilling zone using the estimated values. In the present invention, slowness of a sweet spot horizontal drilling zone is estimated using a combination of density logging and resistivity logging data without performing sonic logging on the sweet spot horizontal drilling zone. Also, elastic modulus and brittleness of the horizontal drilling zone are estimated based on the slowness, and the reserve amount of shale gas is estimated for each region of the sweet spot horizontal drilling zone.