✅18. Why choose this test series over others?

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🎯19. Which test series should I join for both exams?

Answer:
Join the ACE Combo Series, which includes:
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. ACE COMBO Test series for ONGC and GATEPE preparation (150+ Tests)

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Dear friends,

💯Do you know since past 6 years, record of toppers indicate that those who scored excellent in Maths and Aptitude tops the GATE exam.
💯It was never about your knowledge in Reservoir, Drilling or Production.
It was all about scoring maximum in GATEPE exam anyhow.

💯Those who knew it are selected in ONGC.

All those who have joined the Ace Test Series,
Now practise more and more maths, English, apti non tech to stay ahead of the best. We have uploaded more tests on Maths, Aptitude and English tests in test series with Technical section.

Practise more.
ACE for ONGC

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⏳ FINAL REMINDER – ONLY FEW HOURS LEFT!
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🔥 “Success favours those who act fast — not those who wait.”
Today’s decision will define your 2026 result.

The productivity of a well in a naturally fractured reservoir mostly depends on:

A. Matrix porosity
B. Fracture connectivity
C. Water salinity
D. Bit type used

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A top-drive system mainly helps reduce:

A. WOB
B. Tripping time
C. Mud weight
D. Well trajectory

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The rate of penetration (ROP) decreases drastically when:

A. Mud weight is reduced
B. Differential pressure increases
C. Rotary RPM increases
D. Bit teeth are sharp


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Gas coning is more common in wells:

A. With low permeability
B. With high vertical permeability
C. Operating at low drawdown
D. With high water saturation

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ESPs are avoided in:

A. High GOR wells
B. High salinity wells
C. Low temperature wells
D. Shallow wells

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The most accurate formation permeability is measured by:

A. Log-derived permeability
B. Core analysis
C. MWD tools
D. Drill stem test

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The main reason for stuck pipe due to differential sticking is:

A. High annular velocity
B. High mud filtrate loss
C. Fast ROP
D. Smaller drill collars

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Waterflood breakthrough occurs when:

A. Mobility ratio is <1
B. Reservoir pressure becomes zero
C. Water front reaches the producer
D. Injection rate is too low


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In gas lift, lowering the injection depth generally:

A. Reduces lift efficiency
B. Increases lift efficiency
C. Stops gas injection
D. Increases backpressure

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NMR logs are primarily used to estimate:

A. Formation temperature
B. Free vs. bound fluid volumes
C. Sandstone lithology
D. Cement thickness

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Multilateral wells are drilled mainly to:

A. Increase casing strength
B. Access multiple reservoir layers
C. Avoid sidetracks
D. Reduce mud losses

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A mud with high gel strength may cause:

A. Better hole cleaning
B. Lost circulation
C. Surge and swab issues
D. Higher ROP


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A key controlling factor in miscible gas injection EOR is:

A. API gravity
B. Minimum miscibility pressure
C. Water saturation
D. Capillary pressure only


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The best indicator of well deliverability during testing is:

A. Static temperature
B. Flow-after-flow test results
C. Casing shoe integrity
D. Coring data


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The primary function of a packer in completion is:

A. Cement production
B. Provide zonal isolation
C. Increase porosity
D. Reduce GOR


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The drill string component that provides weight on bit is:

A. HWDP
B. Drill collars
C. Stabilizers
D. Kelly


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