JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV PETROLEUM RESERVOIR STIMULATION Previous Question Paper (December - 2019 - R16)
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 as sub questions.
Part A
What are the applications of reservoir stimulation in petroleum production?
Answer
Reservoir stimulation is primarily applied to bypass near-wellbore damage (skin effect), connect the wellbore to natural fracture networks, and enhance the effective permeability of low-permeability formations to increase hydrocarbon production rates and ultimate recovery.
Explains a typical stress-strain relationship for rocks.
Answer
The stress-strain relationship for rocks typically exhibits an initial linear elastic region where deformation is proportional to stress (governed by Young's modulus). As stress increases, the rock enters a non-linear plastic or ductile region, eventually reaching a yield point followed by strain hardening or softening, leading to brittle or ductile failure depending on confining pressure and rock type.
What are the advantages and disadvantages of modelling of hydraulic fracturing?
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What is acid fracturing?
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Compare the interrelation of pre- and after-closure pressure analyses.
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Explain briefly radial fracture decline analysis.
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Discuss the prediction of fractured well performance.
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What is the normal proppant scheduling?
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What are the potential problems during diversion treatment?
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Explain briefly the inverse infectivity diagnostic plot.
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Part B
Explain the inflow performance relationship (IPR) for pseudo steady state for an oil well.
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What are the rock mechanical property measurements in stimulation and its applications?
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Classify the various additives, treating techniques and materials for acid fluid-loss control.
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Derive the mathematical expression for Khristianovich–Geertsma–de Klerk model.
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What is the formation pressure capacity? Explain the formation pressure capacity for PKN-type fracture.
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Explain about the fracturing diagnosis using pressure analysis.
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Explain the process of candidate selection consists of identifying wells with low productivity relative to what they are capable of producing and then evaluating possible mechanical problems in these wells.
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Calculation of reduction in apparent fracture conductivity resulting from non-Darcy fracture flow. A vertically fractured gas well has hf = 100 ft and w = 0.25 in. The fracture is propped with 20/40-mesh Hickory fracture sand and has kf = 85,000 md at reservoir confining conditions. The well is produced at 10 MMscf/D, and γg = 0.6. Determine the percent apparent fracture conductivity reduction resulting from non-Darcy fracture flow for the reservoir.
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Explain the comparison of acid fracturing Vs fracturing with propping agent.
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Explain in detail the process of the treatment response diagnosis.
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What are the important considerations of acid treatment design?
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