The origin of igneous and metamorphic rocks as a function of geologic and plate tectonic setting.
A chrono-alteration model highlights the role of climatic changes in the distribution of the minerals at the surface of the volcanic rocks as a function of the ages.
Two general regression neural network (GRNN) models were developed to predict Vs of sandstones, shaly sands, and carbonate rocks as a function of the compressional velocity (Vp), grain density (ρg), clay content, porosity, permeability (k), and the cementation exponent (m) at a fixed effective stress and frequency.
Open image in new window Fig. 60 Changes of hydrocarbon generation and expulsion in the source rocks as a function of buried depth and the lower limit of hydrocarbon accumulation (blue line) (Huo et al. 2014b).
Therefore, it is essential to consider nonlinear algorithms to model the response parameters, such as permeability or rock facies, as a function of independent variables (predictors), for instance well log interpretations.
For a given data set consisting of measured rock properties as a function of pore pressure, we estimate the intrinsic permeability from the permeability measurement with the highest pore pressure because that measurement is closest to the intrinsic permeability value.
Firstly, it represents the strength of rock as a linear function of confining pressure.
The results showed that the liquid flow rate of tight rocks improved as a function of increasement in back pressure, and that it will shorten the testing time and reduce the desired displacement pressure to measure liquid permeability in tight rocks by exerting a back pressure.
The determined full width half maximum (FWHM) of the rocking curves as a function of the Al and Ga concentrations is shown in Fig. 1 b.
A more dramatic presentation of this phenomenon is found when the changes in the 87Sr/86Sr ratios in a variety of minerals in a single rock are depicted as a function of geologic time.
