JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV Year COAL BED METHANE ENGINEERING Previous Question Paper (November/December - 2018 - R15)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
Write the composition of Indian and other countries Coal gas.
Answer
Coal gas typically consists of methane (CH4) as the primary component, ranging from 80% to 95%. Other components include ethane, propane, carbon dioxide (CO2), nitrogen (N2), and trace amounts of hydrogen sulfide. Indian coal bed methane is generally characterized by high methane purity, often exceeding 90-95%, with relatively low concentrations of non-hydrocarbon gases compared to some international basins.
What is coal and where does it originate?
Answer
Coal is a combustible, sedimentary organic rock composed primarily of carbon, along with varying amounts of hydrogen, oxygen, nitrogen, and sulfur. It originates from the accumulation and biochemical alteration of plant debris in ancient swampy environments, which is subsequently subjected to heat and pressure over millions of years through a process known as coalification.
What does open hole completions mean?
Answer
Sign in to view the complete answer paper.
Explain Origin of Coal bed methane reservoirs.
Answer
Sign in to view the complete answer paper.
Define Permeability. How to measure the permeability?
Answer
Sign in to view the complete answer paper.
Calculate gas and water flow from a well producing steadily under the following conditions: k = 0.003 darcy, h = 40 ft, μ = 0.02 cp, z = 0.90, T = 60°F, re = 1000 ft, rw = 0.25 ft, pe = 500 psi, pw = 50 psi.
Answer
Sign in to view the complete answer paper.
What are the parameters required for selecting hydraulic fracturing fluid?
Answer
Sign in to view the complete answer paper.
What is hydraulic fracturing? List out the fracturing fluid types.
Answer
Sign in to view the complete answer paper.
What is the composition of CBM water?
Answer
Sign in to view the complete answer paper.
Explain the environmental impact of CBM produced water.
Answer
Sign in to view the complete answer paper.
Part B
Classify types of Coal and explain proximate analysis and ultimate analysis of coal in detail.
Answer
Sign in to view the complete answer paper.
Explain Cleat and Fracture formation with neat diagram.
Answer
Sign in to view the complete answer paper.
A slurry is composed of a sack Class G cement, 35% silica flour and 44% water. Find the density of slurry. Given data: Weight of Cement = 94 lbs/sack, Weight of Water = 44% of a cement sack, Weight of Silica Flour = 35% of cement sack.
Answer
Sign in to view the complete answer paper.
Explain in detail about Multi zone well completion techniques with neat sketch.
Answer
Sign in to view the complete answer paper.
The following data are given for the Bell Gas Field: Area = 160 acres, Net productive thickness = 40 ft, Initial reservoir pressure = 3250 psia, Porosity = 22%, Connate water = 23%, Initial gas FVF = 0.00533 ft3/SCF, Gas FVF at 2500 psia = 0.00667 ft3/SCF, Gas FVF at 500 psia = 0.03623 ft3/SCF, Sgr after water invasion = 34%. Find the following: a) Initial gas in place, b) Gas in place after volumetric depletion to 2500 psia, c) Gas in place after volumetric depletion to 500 psia, d) Gas in place after water invasion at 3250 psia, e) Gas in place after water invasion at 2500 psia, f) Gas in place after water invasion at 500 psia, g) Gas reserve by volumetric depletion to 500 psia.
Answer
Sign in to view the complete answer paper.
Explain logging tool characteristics in detail.
Answer
Sign in to view the complete answer paper.
Explain in detail about mapping of fractures in coal mines with neat sketch.
Answer
Sign in to view the complete answer paper.
Explain the following:
Estimation of the length of the fracture.
Answer
Sign in to view the complete answer paper.
Estimation of the fracture width.
Answer
Sign in to view the complete answer paper.
What are the potential environmental impacts of coal bed methane extraction?
Answer
Sign in to view the complete answer paper.
Explain in detail about the following water treatment techniques with neat sketch:
Reverse Osmosis
Answer
Sign in to view the complete answer paper.
Ion Exchange
Answer
Sign in to view the complete answer paper.