# Chemical Engineering

## The following PVT and production history data are available on an oil reservoir in UMAT: Original oil in place = 10 MMSTB Initial water saturation = 22% Initial reservoir pressure = 2496 psi Bubble-point pressure = 2496 psi Pressure B. R, BE Ho GOR (psi) (bbl/STB) (scf/STB) (bbl/scf) (cp) (cp) (scf/STB) 2496 1.325 0.000796 0.906 0.016 650 1498 1.250 486 0.001335 1.373 0.015 1360 1302 1.233 450 0.001616 1.437 0.014 2080 650 Given that the oil production at 1498 psi and 1302 psi are 1.38 MMSTB and 2.26 MMSTB respectively, Calculate: i. Pore volume ii. Oil and gas saturations at 1498 and 1302 psi Volume of gas produced at 1498 and 1302 psi iv. Relative permeability ratio (kg/ko) at 1302 psi (9 marks)

EXPERT ANSWER All the equations used in this answer are taken from Advanced Reservoir Engineering by Tarek Ahmed (Chapter 5) i) Pore Volume = NBoi/(1-Swi) N = 10 MM STB Boi = 1.325 bbl/STB Swi = 0.22 Therefore, applying these values in the equation, we finally get, Pore Volume = 16.987 MM bbl ii) So = (1 – …

## The following PVT and production history data are available on an oil reservoir in UMAT: Original oil in place = 10 MMSTB Initial water saturation = 22% Initial reservoir pressure = 2496 psi Bubble-point pressure = 2496 psi Pressure B. R, BE Ho GOR (psi) (bbl/STB) (scf/STB) (bbl/scf) (cp) (cp) (scf/STB) 2496 1.325 0.000796 0.906 0.016 650 1498 1.250 486 0.001335 1.373 0.015 1360 1302 1.233 450 0.001616 1.437 0.014 2080 650 Given that the oil production at 1498 psi and 1302 psi are 1.38 MMSTB and 2.26 MMSTB respectively, Calculate: i. Pore volume ii. Oil and gas saturations at 1498 and 1302 psi Volume of gas produced at 1498 and 1302 psi iv. Relative permeability ratio (kg/ko) at 1302 psi (9 marks)

EXPERT ANSWER All the equations used in this answer are taken from Advanced Reservoir Engineering by Tarek Ahmed (Chapter 5) i) Pore Volume = NBoi/(1-Swi) N = 10 MM STB Boi = 1.325 bbl/STB Swi = 0.22 Therefore, applying these values in the equation, we finally get, Pore Volume = 16.987 MM bbl ii) So = (1 – …

## The flow water in a pipe is mathematically modelled as ? a) Distributed parameter system b) can be lumped or distributed c) Lumped parameter system d) All of cases are possible

McQ :The flow water in a pipe is mathematically modelled as ?a) Distributed parameter systemb) can be lumped or distributedc) Lumped parameter systemd) All of cases are possible EXPERT ANSWER Option (a) is correct. The flow water in a pipe is mathematically modelled as ~ (a) Distributed parameter system Explain : A mathematical model for the optimization …

## The Mars-van Krevelen (MvK) kinetic mechanism is generally used to describe the kinetics of reactions that proceed by a surface redox mechanism where oxygen is provided by one catalytic component to an adsorbed reactant on another catalyst site leading to oxidation. An example is selective oxidation of hydrocarbons. For the oxidation of CO over copper oxide and iron oxide, derive the rate equation. Take into account that gas-phase CO reduces Cu2+ to Cu1+. The FeO contributes its O to deoxidize Cu to Cu2+, with reduced Fe forming gas-phase O2 that then adsorbs and oxidizes Fe to FeO. Below are the relevant reaction equations: CO + 2CuO  Cu2O + CO2

The Mars-van Krevelen (MvK) kinetic mechanism is generally used to describe the kinetics of reactions that proceed by a surface redox mechanism where oxygen is provided by one catalytic component to an adsorbed reactant on another catalyst site leading to oxidation. An example is selective oxidation of hydrocarbons. For the oxidation of CO over copper …

## Nitrogen was employed to determine the surface area of 1.0 g of sample of silica gel, and the results obtained are shown in the table below. The sample of silica gel was maintained at the normal boiling point of liquid nitrogen (77K). One molecule of nitrogen occupies 16.2 × 10-20 m2 area of plane surface. Calculate the specific surface area of the silica gel (in m2/g) by the BET method. The saturation vapor pressure p0 of nitrogen at 77K is 101.3 kPa.

Nitrogen was employed to determine the surface area of 1.0 g of sample of silica gel, and the results obtained are shown in the table below. The sample of silica gel was maintained at the normal boiling point of liquid nitrogen (77K). One molecule of nitrogen occupies 16.2 × 10-20 m2 area of plane surface. Calculate the …

## A burst of 1 x 10^9 neutrons from a pulsed accelerator is introduced into a subcritical assembly consisting of an array of natural uranium rods in water. The system has a multiplication factor of 0.968 . Approximately 80% of the incident neutrons are absorbed in uranium. (a) How many first-generation fissions do the neutrons produce in the assembly?

A burst of 1 x 10^9 neutrons from a pulsed accelerator is introduced into a subcritical assembly consisting of an array of natural uranium rods in water. The system has a multiplication factor of 0.968 . Approximately 80% of the incident neutrons are absorbed in uranium. (a) How many first-generation fissions do the neutrons produce …