...) algorithm was applied to predict the spatial variations of key petrophysical parameters (porosity, permeability, and saturation) for inter-well regions. In this method, acoustic impedance (AI) models are computed from post-stack seismic amplitude data by seismic inversion in the time domain with measured...

... in the oil-saturated sample, and even smaller in the brine-saturated sample. It was even smaller in the dry sample. It appears that in the liquid-saturated plugs, the AE level is monotonically related to the acoustic impedance of the pore fluid – the smaller the impedance the higher the AE. It does...

... of the rock. complex reservoir impedance dynamic fracture network generation deformation history growth timestep Proportion ray hydraulic fracturing fracture intensity fracture network Terminate new method Upstream Oil & Gas target size computational cost fracture connectivity...

.... The new models were composed of a piston, a shank rod, a rod and a joint. The acoustic impedance of the piston, shank rod and rod was set to the same values as actual products. A spring model for the joint was adopted in the calculation. The calculated waves were compared to the measured ones which did...

... impedance free oscillation fracture equation characteristic impedance Wellhead hydraulic fracture conduit ABSTRACT ABSTRACT The initiation and growth of a hydraulic fracture cause fundamental changes in the free-oscillations that occur in a well in response to an initial temporary excitation...

... generated in the drill steel by piston impact and of the impedance or relationship between force applied to the bit and displacement into the rock. This force displacement relationship is in turn a function of the rock properties and the indentor geometry. Thus for a given drill operating in a given rock...

..., detonation velocity, the char- acterlstlc impedance of the explosive and of the roc maximum available energy, borehole pressure, the con- dition ar, u properties of the rock, hole diameter, charge length, type of stemming, point of lnitla ion, and the decoupling. All of these factors must be carefully...

... of 18,500 ft/sec, and an impedance of 54.5 lb sec/in 3. A total of eight explosives were compared in these tests. Charge dimensions ranged from I to 3 ft SI S5 Surfoc S5 S7 S9 SlIGI G G5 G4 G5 G6 ?GSSI SIO S8 S6 S4 S o I o I o I o.L51sl o 50 ol o I ol o 70 170 Legend o Shot holes ß Gage holes...