... traditional seismic inversion approaches : direct linear inversion and iterative non-linear least-square inversion. Represented by either the 2.5-D Born or the 2.5-D Kirchhoff approximation, the predict- ed data are parameterized in terms of intercept and slope of the angle-dependent reflection coefficient...

... modèle profondeur est enfin calculé par migration d e cartes à l'aide d'un algorithme de tracé de rayons. Le programme de migratio approximation migration velocity field interval velocity map refraction algorithm Reservoir Characterization subsurface velocity model interpretation...

... process. After giving the characteristics of the computer used, the AUTHOR stated that this type of computer is large enough and commented then on the time needed, because the iterative process involved requires a lot of time; in a rough approximation, a section as that presented from the North Sea...

... approximations, speed-up in solving linear systems), data processing and the ways to use the models. We have not tried to be exhaustive, but rather to put down our observations of how the models have evolved. Résumé. Depuis leur apparition, qui remonte à plus de 10 ans, les moddes de gisements sont de plus...

... is scissa 5 0 TO = - then 1 rather small, if compared to the leng hydraulic fracturing fracture wall approximation rupture liquid rupture graph Upstream Oil & Gas fracture vertical fracture contour formulae injection equation relation APW liquid injection configuration drilling...

... at room temperature, at higher temperatures and at the highest temperatures when the material creeps. The following results have been found: The bolt load can be calculated with the aid of the formula of Petrie & Watts, being a very good approximation. The bolt load decreases at increasing...

...-Examples of the Pressure Build-up in a Well II, 4-Example of the Pressure Build-up in a Weil in a Finite Reservoir .......... 517 II, j-Comm compressibility new well psig Upstream Oil & Gas horner-pressure buildup application Drillstem Testing approximation linear barrier fault...

... icarlclicli genau an einen Streichlinienplan (Fallen). U'ir nehmen an, dass man inz ganzen Frld die wirklzchen Gleichu Upstream Oil & Gas approximation donne pendage couche drilling operation sondage methode strate suivant etude analytique hypothese profondeur suivante coupe...