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**Exponential decline curve is to be used to estimate the oil reserves of a well. The current oil production rate is 1000 m3 per day and yearly decline rate is 6% per year. If the minimum oil flow rate economically sustainable for the well is 1 m3 per day, the reserves (economically producible) associated with the well are _____ × 106 m3 . (rounded-off to two decimal places. Use 1 year = 365 days) Gate-2018-General-Aptitude**

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**The relative decline rate of oil is given by 1/q dq/dt = −aq^b , where q is the oil production rate, a (> 0) is the decline rate and b is a constant. The equation gives harmonic decline curve when b is (A) 1.5 (B) 1 (C) 0.5 (D) 0**

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**The viscosity, μ (in Pa.s) of a power law fluid as a function of shear rate, γ̇ (in s-1 ) is given by the following relation: Gate-2018-General-Aptitude**

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**A company invests Rs.50 thousand in assets. The initial investment is Rs.30 thousand with two subsequent investments of Rs.10 thousand each at the end of 1 st year and 2nd year. The useful life of the assets is 10 years with no salvage value at the end. If the interest rate is 10% and the minimum attractive rate of return (MARR) is 12%, the annual capital recovery and return (CRR) in thousands of Rs. is**

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**A 50 mm (diameter) sphere of solid nickel is oxidized in a gas mixture containing 60% argon and 40% oxygen by volume. The rate of oxidation of nickel is controlled by the rate of transport of oxygen through the concentration boundary layer. The rate of oxidation (in moles of nickel per minute (mol/min), rounded off to two decimal places) is_______________. Given: Total pressure = 1atm.; Temperature = 1173 K; Concentration of oxygen at the surface of the solid = 0; Boundary layer mass transfer coefficient = 0.03 m. s^−1 ; Universal gas constant, R = 8.205 × 10^−5 m3 . atm.K ^−1 . mol^−1 . Assume ideal gas behavior.**

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**Which one of the following options presents the correct combinations? (P) Borisov’s (I) Critical rate correlation in vertical wells with coning (Q) Schols’ (II) Horizontal well performance relation (R) Efros’ (III) Vertical well performance relation (S) Wiggins’ (IV) Critical rate correlation in horizontal wells with coning.Gate-2018-General-Aptitude**

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### Notes

**Gate-2018-General-Aptitude**

**CE 2402 ESTIMATION AND QUANTITY SURVEYING**

**Gi-Fi**

**aptitude-gate-2018**

**CE 2451 ENGINEERING ECONOMICS AND COST ANALYSIS**

**WiFiber**

**Numerology number 1**

**Gate-2019-General-Aptitude**

**GE6252 Basic Electrical and Electronics Engineering Anna university notes**

**DME 202 Entrepreneurship Development and Research**

## Exponential decline curve is to be used to estimate the oil reserves of a well. The current oil production rate is 1000 m3 per day and yearly decline rate is 6% per year. If the minimum oil flow rate economically sustainable for the well is 1 m3 per day, the reserves (economically producible) associated with the well are _____ × 106 m3 . (rounded-off to two decimal places. Use 1 year = 365 days) Gate-2018-General-Aptitude

Derive the formula and answer the question .Asked On2019-06-06 08:09:01 by:Jaynil-Gaglani

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