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WorksheetsВопросы по геологии и нефтегазам
Total questions: 30
Worksheet time: 18mins
What is the correct order of stages in oil and gas exploration?
Regional geological and geophysical work → Exploration work → Prospecting (correct)
Exploration work → Prospecting → Regional geological and geophysical work
Regional geological and geophysical work → Prospecting → Exploration work
What is the main activity during seismic acquisition?
Recording and creating seismic data (correct)
Mapping horizons and structures
Drilling exploratory wells
Analyzing seismic sections
What is the purpose of seismic interpretation?
To record seismic data
To identify seismic studies
To identify horizons and structures and maps (correct)
To drill exploratory wells
What is one of the goals of geological research?
Maximization of production rates
Identification and assessment of potential hydrocarbon reserves in geological structures (correct)
Transportation of hydrocarbons to processing plants
Why is exploratory drilling considered an important assessment method?
Determines the best production methods
Determines the presence and economic feasibility of hydrocarbons (correct)
Reduces the cost of geological studies
Maps surface geological formations
What method uses geological and petrophysical data to calculate the volume of hydrocarbons in place?
Volume method
Decline curve method (correct)
Analog method
Probabilistic methods
Which method takes into account uncertainties and provides a range of results for extracted volumes?
Volume method
Decline curve method
Probabilistic methods (correct)
Analog method
Which of the following methods uses tools such as Monte Carlo simulations?
Volume method
Curve reduction method
Analog method
Probabilistic methods (correct)
What is the main problem of geological risk in oil and gas exploration?
Combining geological, technical, and economic risks to calculate the probability of a successful discovery
Variations in oil prices and production costs
Uncertainty in subsurface geology, such as reservoir rocks or effective seals (correct)
Problems in extraction and recovery technologies
What type of porosity of the packing is illustrated in the picture?
Cubic packing (correct)
Tetragonal
Cubic packing with two particle sizes
Sand with irregular particle shape
In Darcy's equation, which parameter represents the ability of a rock to transmit fluids?
Pressure gradient
Viscosity of the fluid
Permeability (correct)
Flow rate
Which method analyzes historical production data to forecast future production and remaining reserves?
Material balance method
Decline curve method (correct)
Stochastic modeling
Volume method
What is the main goal of stochastic modeling (e.g., Monte Carlo simulation) in reserve estimation?
Reviewing reserves during production.
Forecasting production rates based on declining trends.
Accounting for uncertainties by modeling multiple scenarios for each parameter. (correct)
Measuring pressure in the reservoir under various conditions.
For which geological reserves is the extraction coefficient evaluated?
For profitable (extractable) geological reserves (correct)
For unprofitable geological reserves
For profitable and unprofitable geological reserves
For economically unfeasible extraction
What is the first step in evaluating reserves in a three-dimensional model?
Determining the average porosity of reservoir rocks.
Determining the area and volume of hydrocarbon-bearing reservoirs. (correct)
Determining the volume of pore space saturated with hydrocarbons.
Bringing hydrocarbon volumes to standard conditions.
What is the last step in calculating static reserves?
Determining the total area of reservoir rocks containing hydrocarbons.
Calculating the average porosity of reservoir rocks.
Adjusting the volume of hydrocarbons to standard conditions. (correct)
Assessing the economic feasibility of the reservoir.
What does the average saturation of oil and gas in reservoir rocks represent?
What does the saturation of gas in reservoir rocks represent?
Proportion of hydrocarbons to the total volume of the reservoir.
Ratio of the volume of rock saturated with hydrocarbons to the total volume of the rock.
Volume of hydrocarbons at standard conditions.
Density of hydrocarbons in reservoir rocks.
What distinguishes C1 category reserves?
These are reserves evaluated using geological and geophysical data.
These are open reserves confirmed by drilling and well testing.
These are reserves located in areas without geological justification for hydrocarbons.
These are reserves based on assumptions without testing.
What characterizes C2 category reserves?
Reserves confirmed by drilling and testing of deposits.
Reserves preliminarily assessed based on geological and geophysical data.
Reserves justified by the presence of established characteristics of the deposit.
Reserves that are confirmed by drilling.
What characterizes zero offset VSP?
The energy source is located at a distance from the well.
Multiple sources are arranged radially.
The energy source is located on the surface near the well.
It produces 3D images of layers near the well.
What is the key feature of Offset VSP?
Uses multiple sources arranged radially.
Provides an image at half the offset distance.
The energy source is located near the well.
Produces 3D images of salt dome edges.
Why is the reservoir characterization important after the opening of an oil reservoir?
To determine drilling locations without considering hydrocarbon volumes.
To calculate hydrocarbon reserves and determine the available volume of oil and gas.
To minimize environmental regulations.
To reduce the need for geophysical studies.
What is the goal of developing an optimal production strategy in reservoir management?
Reduce costs for seismic studies.
Drill the maximum number of wells.
Extract maximum hydrocarbons with minimal costs.
Prioritize geological studies over production.
What property of a reservoir grid cell represents the percentage of oil in the pore space?
Permeability
Oil saturation
Porosity
Rock density
How does the reservoir grid assist in production simulation?
By testing various extraction strategies, such as the distance between wells and production volumes.
By eliminating uncertainties in reservoir properties.
By providing an alternative to the use of geological and petrophysical data.
By avoiding the need for updates during drilling.
Why is it important to determine the pressure mechanism at an early stage of the reservoir's life?
To identify the best locations for exploratory drilling.
To maximize extraction and improve reservoir management in its mid and late life.
To eliminate the need for production data analysis.
To reduce the need for secondary recovery.
How is the reservoir pressure mechanism determined?
By analyzing production data, such as reservoir pressure and liquid production ratios.
By conducting laboratory experiments on reservoir samples.
By studying the geological structure of the reservoir.
By conducting seismic studies.
What is the difference between extracting oil from shale and extracting shale oil?
Horizontal wells with heaters for shale oil and horizontal wells with hydraulic fracturing for shale.
Vertical wells with heaters for shale oil and vertical wells with hydraulic fracturing for shale.
Horizontal wells with heaters for shale and horizontal wells with hydraulic fracturing for shale oil.
What is the main difference between bituminous sands and shale oil?
Bituminous sands are found in shallow reservoirs, while shales are located deeper underground.
Bituminous sands contain free heavy oil, while shales contain oil locked in kerogen.
Bituminous sands require heating to extract oil, while shales do not.
