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) Read More »

Problem 2 (30 Points). A pipe transmits water from a tank A to point C that is lower than above water level in the tank and 5 m long from the tank. The friction factor (4 f) is 0.08, WI the tank by 4 m. The pipe is 100 mm diameter and 15 m long. The highest point on the pie is 1.5 m and outlet to the pipe. a. Determine the velocity of water leaving the pipe at C? b. Calculate the pressure in the pipe at the point B? (15 Points) (15 Points) ZA ZB

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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) Read More »

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 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 Read More »

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 …

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 Read More »

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 …

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. Read More »

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 …

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? Read More »

Problem3 The gas-phase reaction 4A→ 3B + 2C occurs via the following sequence of elementary steps. Y and Z are reactive intermediates. a) Obtain an expression for the reaction rate, r, in terms of the reaction rate for step 3, r3. Note that the elementary steps written may need to occur multiple times to give the overall reaction stoichiometry b) Using your answer from part A, obtain an expression for the reaction rate, r,in terms of rate constants and concentrations of reactants and products assuming only PSSH on the intermediates. c) Experimentally, at some conditions, the reaction rate exhibits the following dependence on the concentration of A and B (A)2 What approximations are required in the rate expression obtained in part B in order to explain the concentration dependence on this rate? d) For the general case, simplify the rate expression obtained in part IB assuming that: (i) Step 1 is irreversible ii) Step 1 is quasi-equilibrated

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