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This study investigates two cases of velocity predictions for North Sea chalk: fluid substitution of compressional velocity (vP) and estimation of shear velocity (vS).
The overpressure evolution, which corresponds to the tectonic evolution, consists of three phases: early disequilibrium compaction, middle fluid substitution and late disequilibrium compaction.
However, due to the low mobility of heavy oil, more water tended to be drained away from the region of strong overpressure, and thus the intuitive fluid substitution occurred.
The fluid substitution effect on the compressional velocity is well estimated from all the four methods: the bound averaging method (BAM), the isoframe method, the method of replacing bulk modulus in the Gassmann's relations with P-wave modulus and the method of decomposition of measured P-wave modulus into shear and bulk modulus.
For fluid substitution, the Gassmann's equation has been used.
Gassmann's equation, a well-known equation for fluid substitution, has been used for fluid substitution in this research.
Similar(28)
Saturated rock density is calculated using the density-porosity equation, given as follows: rho_{text{s}} = left( {1 - emptyset } right)rho_{text{m}} + emptyset rho_{text{f}} (31 Gassmann's equation is used for three different fluid substitutions: gas, live oil, and brine water at the reservoir level.
Meanwhile, the patient received 6 units of packed red blood cells (PRBC) and further fluid substitutions.
Glomerular filtration rate improved to 33.1 ml/min under balanced fluid-substitution.
Two loop heat pipes have been built and tested, where they differ from each other on their compensation chamber geometry and use high grade acetone as working fluid, in substitution of the so-used ammonia.
When fluid volume substitution alone was insufficient to maintain central hemodynamics, adrenergic drugs (dobutamine and norepinephrine) were used.
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