Datasets:
number int64 1 100 | question stringlengths 21 1.02k | A stringlengths 1 137 | B stringlengths 1 123 | C stringlengths 2 142 | D stringlengths 2 97 | correct_answer stringclasses 4
values | figure imagewidth (px) 184 2.53k ⌀ |
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1 | Which of the following factors has the LEAST impact on casing seat selection? | Rate of Penetration | Pore pressure | Kick tolerance | Fracture gradient | A | Not supported with pagination yet |
2 | When considering calculation methods for survey points, the LEAST precise method is: | Circular arc | Minimum curvature | Radius of curvature | Tangential | D | Not supported with pagination yet |
3 | Which of the following is NOT a typical purpose for a BHA? | Assure casing can be run into a hole | Control direction and inclination in directional holes | Increase severity of doglegs, keyseats and ledges | Protect the drill pipe from excessive bending and torsional loads | C | Not supported with pagination yet |
4 | Which of the following is a typical characteristic of plug flow cement placement? | Reynolds number less than 100 | Large cement volumes | High displacement rates | Short cementation times | A | Not supported with pagination yet |
5 | Which of the following is NOT a typical cause for a fishing job? | Cementing error | Differential sticking | Swelling zone | Use of oil-base mud | D | Not supported with pagination yet |
6 | Which of the following is NOT a component of the hoisting equipment for a drilling rig? | Crown block | Drawworks | Drilling line | Rotary table | D | Not supported with pagination yet |
7 | Which of the following is NOT a primary function of drilling fluids? | Cuttings removal | Frac proppant | Lubrication and cooling | Well control | B | Not supported with pagination yet |
8 | Which of the following methods is MOST likely to hydrostatically balance a well kick with only one circulation? | Concurrent | Driller’s | Toolpusher’s | Wait and weight | D | Not supported with pagination yet |
9 | Critical rotary speed longitudinally (rpm*) is calculated by rpm* = 258,000/L, where L is the total length of the drill string (ft). Which of the following is a multiple of rpm* at which secondary and higher harmonic vibrations will occur? | 2 | 8 | 16 | 32 | C | Not supported with pagination yet |
10 | Which of the following is NOT a colloidal polymer? | Xantham gum | Starch | Sodium carboxy methyl cellulose | Hydroxyethyl cellulose | A | Not supported with pagination yet |
11 | Which of the following is a major consideration for cuttings transport in horizontal wells? | Annulus size | Drilling Rate | Eccentricity | Rotary speed | C | Not supported with pagination yet |
12 | Which of the following is NOT a routine roller cone bearing package description? | Friction-ball-friction | Friction-ball-roller | Roller-ball-friction | Roller-ball-roller | B | Not supported with pagination yet |
13 | In comparing the API specs for L-80 and N-80 tubulars, which of the following statements is TRUE? | Minimum yield strength is different | Maximum yield strength is the same | Minimum tensile strength is different | Minimum elongation is the same | C | Not supported with pagination yet |
14 | Which of the following is NOT a typical separator type? | Horizontal | Slant | Spherical | Vertical | B | Not supported with pagination yet |
15 | Which of the following is NOT a typical casing hanger type? | Slip-weld | Nominal flange | Boll-weevil | Automatic | B | Not supported with pagination yet |
16 | The control pressure for a surface safety valve is most likely equal to: | Valve body pressure divided by actuator ratio | Actuator ratio divided by valve body pressure | Two times valve body pressure divided by actuator ratio | Valve body pressure multiplied by actuator ratio | C | Not supported with pagination yet |
17 | The material for sealing element when approaching 450 degrees F (232 degrees C) and 15,000 psi (103,422 KPa) differential is MOST likely: | Glass-filled Teflon | Kalrez | Nitrile | Viton | A | Not supported with pagination yet |
18 | Tubing elongation MOST likely occurs with: | Ballooning | Buckling | Reverse Ballooning | Temperature Reduction | C | Not supported with pagination yet |
19 | Which of the following is NOT an API classification for oil well pumps? | Tubing type with extension shoe and nipple | Tubing type, traveling barrel with bottom hold-down | Rod type, stationary barrel with top hold-down | Rod type, traveling barrel | B | Not supported with pagination yet |
20 | Which of the following has the LEAST volumetric efficiency for rod pumped wells? | High fluid level with no gas interference | Gaseous wells with fair downhole separation | Foamy liquid or gaseous conditions | Ample pump submergence with good separation | B | Not supported with pagination yet |
21 | A caliper survey has been run on a producing gas well. It shows that the casing is partially collapsed 500 ft (152.4 m) above the perforations. The well is starting to load up with fluid, so a decision has been made to install a small diameter tubing string with a packer set just below the partially collapsed interval ... | Weight-set packer | Tension-set packer | Rotation-set packer | Hydraulic-set packer | D | Not supported with pagination yet |
22 | A platform is producing surplus gas that must be sold into a nearby pipeline; flaring is not permitted. The gas has the following characteristics: gas gravity = 0.689 SG (Air = 1), ratio of specific heats = 1.206, molecular weight = 20, supercompressibility factor = 0.022. Wells on the platform produce a total of 18 mm... | 1,191 | 1,238 | 1,787 | 2,649 | A | Not supported with pagination yet |
23 | What type problem does the below dynamometer card indicate that would cause an excessive number of rod parts in the lower portion of the rod string in this well? | Excessive friction | Overtravel | Plunger sticking | Fluid pound | D | |
24 | A well is to be fracture stimulated down the production casing with the following conditions:
Fracture propagation gradient: 0.95 psi/ft (2.19 SG)
Near well pressure losses: 1,000 psi (6,895 KPa)
Casing friction pressure losses: 1,600 psi (11,032 KPa)
Surface piping friction losses: 300 psi (2,068 KPa)
Stimulation... | 11 | 14 | 16 | 17 | C | Not supported with pagination yet |
25 | A 10,000 HP compressor bank is going to be added to a large pipeline compressor station. An inlet meter station is located 1,200 ft (366 m) away from the new compressor site. Pressure at the meter run is 60 psig (414 KPa). Gas from the meter station will be used for fuel. The gas pressure at the fuel line header inside... | 1.5 (38) | 3.5 (89) | 5 (127) | 6 (152) | B | Not supported with pagination yet |
26 | The following readings were made by a field gas technician at a dry gas sales meter.
Static pressure: 800 psig (5,516 KPa)
Differential: 15-in. (381 mm) H2O
Temperature: 130° F (54.4°C)
Gas Specific Gravity: 0.62 (Air=1)
Meter run: 4.026-in. (102.3 mm) ID
Orifice plate: 1.5-in. (38.1 mm)
Neglect viscosity, sup... | 1,152 (32,621) | 1,328 (37,605) | 1,341 (37,973) | 1,458 (41,286) | A | Not supported with pagination yet |
27 | A gas well with 40 ppm H2S and 14 mole-% CO2 is planned to be produced up a string of tubing cemented in the well as a “tubingless completion” (i.e., the tubing is actually small-diameter production casing).
Initial shut in pressure will be 12,000 psi (82.737 MPa). Initial flowing pressure will be 8,000 psi (55.158 M... | The partial pressure of sour gas is not great enough to need T95 grade pipe | Run all P110 grade pipe. Fast pressure decline mitigates problem with SSC | Recommend running T95 to at least 4,348 ft (1,325 m) from the surface | Recommend running T95 to at least 6,250 ft (1,905 m) from the surface | D | Not supported with pagination yet |
28 | A plug has been set in a profile nipple below a packer in a well. To confirm that the plug will hold, it has been decided to pressure up on the tubing to 9,000 psi (62.1 MPa).
The well is standing full of fresh water. The packer is set at 6,000 ft (1,829 m) and has a 3.5-in. (89 mm) bore. The pipe string is all 2 7/8-... | 54.7 (138.9) | 33.1 (84.1) | 28.4 (72.1) | 4.6 (11.7) | A | Not supported with pagination yet |
29 | A tank is filled with produced water with a density of 8.6 lbm/gal (1.03 SG). A decision has been made to use the fluid for a workover, but the density is too low. Brine with a density of 10.0 lbm/gal (1.20 SG) is to be mixed with fluid in the tank until the contents have the proper density for the job. The brine is to... | 147 (1,014) | 188 (1,294) | 597 (4,116) | 956 (6,588) | D | Not supported with pagination yet |
30 | A pressure relief valve is needed to protect a petroleum storage tank from over-pressure. The relief valve will discharge into a low-pressure vent system with a constant pressure of 0.5 psig (3.4 KPa). The scrubber on this low pressure vent system cannot handle peak flowrates in excess of 6.0 scfm (10.2 m^3/hr).
The r... | 6.4 (16.3) | 6.0 (15.2) | 5.8 (14.7) | 5.5 (14.0) | B | Not supported with pagination yet |
31 | You are calculating the original gas in place using the volumetric method. Which of the following has the LEAST influence on the final result? | Connate water saturation | Initial reservoir pressure | Permeability | Porosity | C | Not supported with pagination yet |
32 | Which of the following is the LEAST likely source for water which encroaches into a reservoir as pressure declines? | Artesian flow | Compressibility of the rock in the aquifer | Expansion of the water in the aquifer | Water coming out of solution from the oil as the pressure drops | D | Not supported with pagination yet |
33 | Important characteristics of the production history of many coal-bed methane wells include: | Initial large and declining water cuts and low and improving gas production rates | Initial large but declining gas/liquid ratios and low but increasing water production rates | Stabilized gas/liquid ratios and decreasing gas rates | Stabilized gas/liquid ratios and increasing gas and water production rates | A | Not supported with pagination yet |
34 | There are known effects of gas on logging tool responses. Which of the following statements is correct? | Density log porosities are not affected by gas | Neutron log porosities are increased by gas | NMR log porosities are reduced by gas | Sonic log porosities are reduced by gas | C | Not supported with pagination yet |
35 | For decline-curve analysis to be accurate, several conditions must be satisfied. Which of the following conditions is not appropriate? | Drainage area of the well remains constant with time. | Skin factor of well is not changing with time. | Well is in transient flow regime. | Well produces at constant BHP. | C | Not supported with pagination yet |
36 | A pressure buildup test is run on a well producing dry gas. Current average reservoir pressure is about 3,012 psia (20.77 × 10^3 KPa) and the flowing bottomhole pressure at the time of shut-in was 1,126 psia (7.76 × 10^3 KPa).
Which of the following statements about analyzing the test data using a semi-log method is ... | A Horner plot of p vs. Horner time ratio will be required. ws | A Horner plot of p 2 vs. Horner time ratio will be required. ws | Bottomhole pressure must be converted to pseudopressure and then a Horner plot of pseudopressure vs. Horner time ratio will be required. | Semi-log analysis cannot succeed for analysis of a gas-well pressure buildup test. | C | Not supported with pagination yet |
37 | Volumetric estimate of original gas in place for gas reservoir A was 100 Bscf (2.831 × 10^9 std m^3). A material-balance estimate, using a p/z plot, was 50 Bscf (1.416 × 10^9 std m^3).
| One or more producing wells intended to produce from Reservoir A is probably completed by mistake in another non-communicating reservoir. | Some of the mapped gas may not be in pressure communication with the producing wells. | The estimate based on the p/z plot cannot possibly be correct. | The reservoir almost certainly has water influx. | B | Not supported with pagination yet |
38 | In a low-permeability gas formation, the deliverability curve determined from a plot of Δp2 vs. q, using available test data from a four-point backpressure test with equal-length flow periods, will usually not be “stabilized.” Therefore, the ability of the gas well to deliver gas at a given backpressure will be: | About the same as predicted from the deliverability curve plotted using available test data. | Greater than predicted from the deliverability curve plotted using available test data. | Less than predicted from the deliverability curve plotted using available test data. | Uncorrelated to the value predicted from the deliverability plotted using available test data. | C | Not supported with pagination yet |
39 | The forecasted production between the current time and the estimated economic limit of a well using a well-defined decline curve is best regarded as | Proved developed reserve | Proved plus probable reserve | Proved plus probable plus possible reserve | Total resource | A | Not supported with pagination yet |
40 | Thermal oil recovery processes increase recovery largely because they: | improve vertical sweep efficiency to virtually 100% in most cases | increase formation water mobility because of increased formation temperature | reduce oil viscosity | reduce residual oil saturation to near zero in swept areas | C | Not supported with pagination yet |
41 | An oil reservoir was originally undersaturated and was known to have no water influx. The PVT properties as determined from a recombined fluid sample are shown on the attached curve. The field is to be waterflooded and part of the pre-flood strategy is to determine the new bubble point for this state of depletion. The ... | 1.460 | 1.450 | 1.440 | 1.240 | B | |
42 | A reservoir oil solution gas-oil ratio follows the Rs plot attached.
The initial reservoir pressure was 3,000 psia (20,684 KPa). What is the bubble point pressure, psia (KPa) of the oil nearest?
| 3,000 (20,684) | 2,160 (14,893) | 1,000 (6,895) | Not enough information | B | |
43 | An oil reservoir was originally undersaturated and was known to have no water influx. The field is to be waterflooded and part of the preflood strategy is to determine the new bubble point for this state of depletion. The initial reservoir pressure is 3,000 psia (20,684 KPa) with an initial oil saturation; Soi = 0.90. ... | 465 ( 83) | 512 (91) | 816 ( 145) | 935 (166 ) | C | Not supported with pagination yet |
44 | You have the following information on a reservoir in Table 1.
Original reservoir pressure was 2,500 psia (17,237 KPa). Well test information and log analysis indicate the presence of a gas cap however, the size of the gas cap is unknown. The reservoir has exhibited the following production performance during depletion... | 0.9995 | 0.2255 | 0.2342 | 0.3454 | D | |
45 | Fractional Flow Curve | 0.05 | 0.72 | 0.64 | 0.68 | D | |
46 | What is the original oil in place in stb (m^3) of a reservoir with the following parameters?
Area = 80 acres, (323,749)
net pay thickness = 50 ft, (15.2 m)
average porosity = 20%,
initial water saturation, Swc = 10%,
initial gas saturation, Sg = 10%,
Initial Oil Formation Volume Factor,
Boi = 1.42 rb/stb, (m3/m... | 3,496,563 ( 555,954) | 3,933,633 (625,448 ) | 6,206,400 ( 986,818) | 300,000,000 (47,700,000 ) | A | Not supported with pagination yet |
47 | Using the following parameters, what is the ratio of the gas cap to the oil rim, m?
Area = 80 acres, (323,749 m2)
net pay thickness = 50 ft, (15.2 m)
average porosity = 20%,
initial water saturation, Swc = 10%,
initial gas saturation, Sg = 10%,
Initial Oil Formation Volume Factor,
Boi = 1.42 rb/stb, (m3/m3)
In... | 0.125 | 0.22 | 0.5 | not enough information | A | Not supported with pagination yet |
48 | A density log in a shaly sand records a formation bulk density, ρb = 2.20 g/cm^3. The correction factor for mudcake and hole rugosity is Δρ = 0.05 g/cm^3. From measurements on cores and produced fluids it is known that the matrix and fluid densities are, ρma = 2.68 g/cm^3 and ρfl = 1.2 g/cm^3.
What is the density log ... | 27 | 29 | 32 | 36 | C | Not supported with pagination yet |
49 | A producer-injector pair of wells in an infinite-acting reservoir has been producing two weeks. The distance between the wells is 500 feet (91.44 m). Assume that the injection and production rates are equal at 1,500 bpd (238.48 m^3/d) and that the rock and fluid properties are the same for both injector and producer.
... | 26.91 (185.54) | 98.78 (681.06) | 239.98 (1654.60) | 656.42 (4525.86) | B | Not supported with pagination yet |
50 | A gas well has been found to be declining exponentially. The observed production rate on 1 January 2004 was 0.6 Bscf/month (1.7 × 10^7 std m^3/month), and on 1 January 2005, it was 0.4 Bscf/month (1.133 × 10^7 std m^3/month). The economic limit for the well is estimated to be 0.003 Bscf/month (8.495 × 10^5 std m^3/mont... | 21.5 (6.09 × 108) | 17.69 (5.01 x 108 ) | 1.791 (5.07 × 107) | 1.474 (4.17 × 107) | B | Not supported with pagination yet |
51 | Which of the following has the LEAST influence on drill pipe stretch? | BHA weight | Drill pipe weight | Mud density | Traveling block weight | D | Not supported with pagination yet |
52 | Which of the following is MOST LIKELY a descriptor for a diamond bit? | Crown | Journal | O-ring Seal | Shirttail | A | Not supported with pagination yet |
53 | Which of the following is NOT a description of fluid flow? | Laminar | Plastic | Plug | Turbulent | B | Not supported with pagination yet |
54 | Which of the following is NOT a key rheological property of drilling fluids? | Yield point | Plastic viscosity | Gel Strength | Funnel viscosity | D | Not supported with pagination yet |
55 | Which of the following has the LEAST influence on bit nozzle pressure drop? | Bit diameter | Flow rate | Mud density | Nozzle area | A | Not supported with pagination yet |
56 | Which of the following is NOT a typical section view for directional wells? | Double build | Double twist | S type | Slant type | B | Not supported with pagination yet |
57 | Which of the following is a conventional rotary shouldered connection size? | 4-1/2” REG | 5-5/8” REG | 6-1/2” REG | 7-1/2” REG | A | Not supported with pagination yet |
58 | Which of the following is a DISADVANTAGE of air drilling? | Differential pipe sticking is eliminated | Downhole explosions or fire may occur | Lost circulation may be reduced | Reduced thawing of frozen zones | B | Not supported with pagination yet |
59 | Which of the following is FALSE regarding leak-off tests? | Unpurged air can affect the shape of the leak-off test curve | There are two phases of fracturing a formation, initiation and extension | The pressure to initiate is usually less than the pressure to extend | The initial pressure increase vs. volume pumped reflects elastic rock deformation | C | Not supported with pagination yet |
60 | Which of the following is MOST LIKELY regarding cement flow regimes? | Laminar flow has the smallest displacement efficiency | Plug flow is very inefficient w/small volumes displacing low density mud | Turbulent flow gives low displacement efficiency | Turbulent flow requires the longest pumping times | A | Not supported with pagination yet |
61 | When backing-off a stuck drill string, which of the following would NOT be a typical step? | Twist the string one counter-clockwise turn per 1,000 feet of free string | Pull the buoyed weight of the string above the stuck point | Fire the shot after working the torque down to the tool joint to be backed off | Twist the string one clockwise turn per 1,000’ of free string | D | Not supported with pagination yet |
62 | Which of the following is NOT a typical contributing factor in axial friction forces? | Bending of the drill string in a dog leg | Buoyed weight of the drill string lying on the low side | Hanging up of drill string component on a ledge | Packing of the drill string in a cuttings bed | C | Not supported with pagination yet |
63 | Which of the following does NOT result in collapse of the tube? | Elastic Collapse Pressure | Plastic Collapse Pressure | Transition Collapse Pressure | Yield-Strength Collapse Pressure | D | Not supported with pagination yet |
64 | The primary function of the counter-balance system in rod pumped wells is: | Speed reduction of the prime mover to suitable pumping speeds | Store energy on the downstroke and release energy on the upstroke | Store energy on the upstroke and release energy on the downstroke | Supply the mechanical energy to transmit to the pump and lift fluids | B | Not supported with pagination yet |
65 | For bellows-type gas-lift valves, valve spread is: | The difference between opening and closing pressures | The difference between annular and bellow pressures | The depth difference between the top and bottom valves | The depth difference between adjacent valves | A | Not supported with pagination yet |
66 | Which of the following would be a typical path for gas through a separator? | Primary separation, liquid accumulation, secondary separation, gas outlet | Primary separation, mist extractor, liquid accumulation, gas outlet | Primary separation, secondary separation, liquid accumulation, gas outlet | Primary separation, secondary separation, mist extractor, gas outlet | D | Not supported with pagination yet |
67 | Which of the following is NOT a primary mechanism in separation devices? | Centrifugal | Gravity | Impingement | Radioactivity | D | Not supported with pagination yet |
68 | Which of the following is NOT a key assumption for matrix acidizing? | Acid penetrates uniformly and radially | Formation is homogeneous | Pore size varies widely | Reaction rate declines uniformly with decreasing acid concentration | C | Not supported with pagination yet |
69 | The fracturing fluid coefficient is a key factor in modeling an induced fracture. Which of the following is NOT a category for fracture fluids? | Conductivity-controlled fluids | Reservoir-controlled fluids | Viscosity-controlled fluids | Wall-building fluids | A | Not supported with pagination yet |
70 | Which of the following is NOT a typical class of pipe cutters? | Acid | Jet-shaped charge | Outside cutter | Tubing punch | D | Not supported with pagination yet |
71 | A pump is needed to move a high viscosity, heavy (high specific gravity) crude oil from a storage tank to a treating facility for processing. The tank is not insulated and it is located in a cold-weather environment. The field from which this oil is produced has a low reservoir pressure, and the oil is produced in slug... | Centrifugal pump | Gear pump | Reciprocating (plunger) pump | Turbine pump | B | Not supported with pagination yet |
72 | A caliper survey has determined that there has been a uniform 65% wall loss in a 5-in. (127 mm) 23.2 lbm/ft (34.5 kg/m) T95 casing string. Neglecting axial/hoop stresses. What is the new burst pressure rating of this casing string in psi/(Mpa)? | 5,550 (38.3) | 6,350 (43.78) | 10,340 (71.29) | 14,300 (98.6) | A | Not supported with pagination yet |
73 | An electric motor is needed for a hoist. The motor is expected to provide a force of 744 lbf (337.5 kgf) at the edge of a 24-in. (61 cm) diameter pulley. The motor will run at 1200 RPM and the pulley will be attached to a gearbox to provide the correct line speed for the hoist. Assume the motor operates at 85% efficien... | 170 HP (126.8) | 200 HP (149.1) | 340 HP (253.5) | 400 HP (298.3) | B | Not supported with pagination yet |
74 | A recently drilled well is being completed. The well was drilled with 14 lbm/gal (1.68 SG) mud with no mud losses experienced while drilling the well. The 5 1/2-in. (140 mm), 15.50 pound/ft (23.06 kg/m) casing has been perforated from 10,129 ft (3,087.3 m) to 10,141 ft (3,091.0 m). A full string of 2 3/8-in. (60 mm) tu... | Natural gas | Oil | Saltwater | Drilling mud | C | Not supported with pagination yet |
75 | A well has ceased flowing due to a buildup of saltwater in the tubing. The well is standing full of produced fluid with a density of 8.9 lbm/gal (1.067 SG). A pumping unit is to be installed to lift the fluid from a depth of 10,000 ft (3,048 m). Expected produced water rate is 220 bbl/D (35 m^3/day). The pumping unit w... | 15 (11) | 20 (15) | 35 (26) | 40 (30) | D | Not supported with pagination yet |
76 | A recently-drilled gas well has been completed, but initial flowrates from the well are disappointing. The well has the following characteristics:
The pay zone perforations are centered at 15,800 ft (4,816 m).
The static reservoir pressure is 0.63 psi/ft (1.45 SG).
The fracture gradient at the perforations is 0.95 psi... | High rate, high volume fracture stimulation | Low rate “matrix” hydrochloric acid stimulation | Sand control treatment to reduce sand collection in the wellbore | Scale removal workover | A | Not supported with pagination yet |
77 | A pumping unit is to be installed on a 5,000 ft (1,524 m) well. The foreman wishes to use 1-in (25.4 mm), 7/8-in. (22.2 mm) and 3/4-in. (19.1 mm) sucker rods to make up the string 8 so he can use his existing inventory and minimize the purchase of new rods. Unfortunately, he only has a limited number of 1-in. (25.4 mm)... | 1,435 (437.4) | 1,635 (498.3) | 1,930 (588.3) | 2,260 (688.8) | A | Not supported with pagination yet |
78 | Three storage tanks are delivered to the site of a new producing well. The tanks appear to be unusual in size. No tank table was delivered with the tanks. The well is to be placed on production as soon as the tanks are set. The basic dimensions of the tanks are:
Tank outside diameter: 15.0 ft (4.57 m)
Shell thickness:... | 509 (80.9) | 1,527 (242.8) | 1,539 (244.7) | 1,593 (253.3) | B | Not supported with pagination yet |
79 | A producing gas well is to be treated with a scale removal chemical at a low pump rate. The well is equipped with a polished-bore receptacle above the production packer with a 20-ft (6.1 m) seal assembly that travels freely. Bottomhole temperature is 300°F (149 °C). Gas temperature at the surface is 120°F (49 °C). Once... | 1.4 (3.6) | 5.3 (13.5) | 16.6 (42.2) | 18.6 (47.2) | C | Not supported with pagination yet |
80 | A double-acting duplex pump is going to be used to fill a tank from a water pit. The foreman does not know the pump output, but he wants an estimate of the time required to fill the 500 bbl (79.5 m^3) tank with water.
Each liner has an internal diameter of 5 1/2-in. (14 cm) and an overall stroke length of 14-in. (35.... | 1.00 hours | 1.17 hours | 1.25 hours | 2.50 hours | C | Not supported with pagination yet |
81 | Which of the following statements is TRUE regarding undersaturated oil reservoirs? | The two phase and single phase factors are equal above the bubble point | The initial solution gas-oil ratio does not equal the solution gas-oil ratio at a specified pressure above the bubble point | Below the bubble point, the two-phase factor decreases while pressure decreases | Below the bubble point, the single phase factor increases while pressure decreases | A | Not supported with pagination yet |
82 | Which of the following is the LEAST likely characteristic of a reservoir fluid? | Compressible liquid | Gas | Incompressible liquid | Superfluid | D | Not supported with pagination yet |
83 | Reservoir simulators are well-suited to help us determine | Aquifer size and strength, remaining reserves, corporate overhead | Future water production, optimal infill well location, results of fracture stimulation treatments | Optimal well spacing in reservoirs, coning characteristics of wells, and optimal flood patterns in improved recovery projects | Unique reservoir description, optimal enhanced recovery method, good matches of reservoir history | C | Not supported with pagination yet |
84 | The factors that cause recovery factors to vary in uncertain ways in oil reservoirs do not include | distribution of permeabilities vertically and horizontally | presence and location of reservoir boundaries | presence and location of reservoir heterogeneities | unexpected variations in oil prices | D | Not supported with pagination yet |
85 | Each type of logging tool has special formation evaluation applications. Which of the following statements is FALSE? | Pressure versus depth measurements can be used to identify reservoir fluids and fluid contacts | NMR and density logs can be combined to predict gas-corrected formation porosity in gas-bearing zones | Resistivity measurements alone can be used to differentiate oil zones from gas zones | NMR fluid characterization logs can be used to identify low-resistivity pay zones. | C | Not supported with pagination yet |
86 | Given accurate test data, the exponent, n, in the Rawlins-Schellhardt gas-well deliverability equation should be:
| less than 0.5. | between 0.5 and 1.0. | greater than 1.0. | between 1.0 and 2.0. | B | |
87 | A reservoir produces gas at an initial gas/liquid ratio (GLR) of 20,000 scf/STB (3,561 std m^3/std m^3). After some period of production at constant GLR, the producing GLR begins to increase with time. Essentially all the produced liquids are gas condensate. The reservoir fluid is most likely which one of the following... | Black oil | Dry gas | Gas condensate (retrograde gas) | Wet gas | C | Not supported with pagination yet |
88 | The proper ranking of average (typical, not exceptional) oil reservoir recovery efficiency (from lowest to highest) by drive mechanism is | solution-gas drive; rock-and-fluid expansion drive; water drive; expanding gas- cap drive | solution-gas drive; expanding gas-cap drive; water drive; gravity drainage drive | rock-and-fluid expansion drive; solution-gas drive; water drive; expanding gas- cap drive | rock-and-fluid expansion drive; expanding gas-cap drive; gravity-drainage drive; water drive | B | Not supported with pagination yet |
89 | Low-permeability or tight gas reservoirs ordinarily produce at economic rates because they are | Stimulated with long, highly conductive hydraulic fractures | Provided substantial tax and other economic incentives by governmental authorities | Drilled with very wide well spacing, often 640 acres (2.59 × 106 m2), and drain large areas efficiently with limited numbers of vertical wells | Completed in formations of massive thickness. | A | Not supported with pagination yet |
90 | You are designing a waterflood for a reservoir that is currently below bubblepoint pressure and shut-in. The initial reservoir pressure was at the bubble point with no gas cap.
The oil reservoir has the following information:
• Flood Pattern — 5-spot
• Pattern Area — 80 acres (323,749 m^2)
• Formation Thickness — 59 f... | 0 (0 ) | 960 ( 152,640) | 2,092 ( 332,628) | 2,542 (404,178) | B | Not supported with pagination yet |
91 | A reservoir oil solution gas-oil ratio follows the R plot attached.
The initial reservoir pressure was 3,000 psia (20,684 KPa). If the current reservoir pressure is 2,500 psia (17,237 KPa), what is the oil solution gas-oil ratio (scf/stb) (m^3/m^3) nearest?
| 375 (67) | 779 (139 ) | 935 ( 166) | Not enough information | C | |
92 | An oil reservoir was originally undersaturated and was known to have no water influx. The field is to be waterflooded and part of the preflood strategy is to determine the new bubble point for this state of depletion. The initial reservoir pressure is 3,000 psia (20,684 KPa) with an initial oil saturation; Soi = 0.90. ... | 3,000 (20,684) | 2,160 (14,893) | 1,800 (12,411) | 1,200 (8,274) | C | Not supported with pagination yet |
93 | You have a PVT analysis for a volumetric reservoir which was undersaturated at the
original reservoir conditions of 6,258 psia (36,890 KPa) and 205 °F (96 °C). The
reservoir has produced at a constant producing GOR until a marked decrease in the
producing GOR was noted. At this point, the cumulative production from the... | 287 (8.1) | 464 ( 13) | 1007 (29) | 306 (8.7) | A | |
94 | What is the breakthrough mobility ratio of an inverted 5-spot pattern undergoing waterflood with the average water saturation at breakthrough equal to 68% (Swbt = 0.68)? Use the following table of oil and water relative permeabilities to calculate your answer. Assume µ oil = 0.64 cp and µ water = 0.50 cp.
| 0.680 | 0.462 | 1.000 | 0.419 | D | |
95 | Using the fractional flow curve, what is the water saturation at the well at the time of
breakthrough? | 0.68 | 0.64 | 0.72 | 0.05 | B | |
96 | What is the original volume of gas cap gas in place in mscf (mm^3) of a reservoir with the following parameters?
Area = 80 acres, (323,749 m^2)
net pay thickness = 50 ft, (15.2 m)
average porosity = 20%,
initial water saturation, Swc = 10%,
initial gas saturation, Sg = 10%,
Initial Oil Formation Volume Factor, B... | 7,757,800 (219,768) | 6,982,020 (197,791) | 775,800 ( 21,977) | 620,624 (17,581) | C | Not supported with pagination yet |
97 | A sonic logging tool recorded a travel time of 90 µs/ft in a loosely consolidated sand formation. From local experience it is known that sonic log travel times in this formation read too high because the formation is loosely consolidated. A correction factor, Cp = 1.2, should be applied to the Wyllie time-average equat... | 17 | 24 | 28 | 34 | B | Not supported with pagination yet |
98 | From lab measurements on core samples from a zone of interest you are given the following Archie parameters: F = 26.0, and n = 2.3. From resistivity measurements on produced formation water samples, R = 0.05 ohm-m w at reservoir temperature. From log measurements, Rt = 10.0 ohm-m and φ = 0.20.
What is Sw, %?
| 33 | 35 | 36 | 41 | D | Not supported with pagination yet |
99 | A high-pressure gas reservoir had a discovery pressure of 10,000 psia (6.895 × 10^4 KPa).
PVT analysis of the gas indicated the following variation in deviation factor, z, with
pressure.
p, psia z, dimensionless
10,000 (6.895 × 10^4 KPa) 1.47
8,000 (5.516 × 10^4 KPa) 1.30
Formatio... | 9.54 | 14.6 | 20.0 | 85.4 | B | Not supported with pagination yet |
100 | A gas reservoir has a reliable estimate of original gas in place of 400 Bcf (400 × 10^9 scf,
1.133 × 10^10 std m^3). There may be water influx into the reservoir from an aquifer.
Estimate the cumulative water influx in reservoir barrels (RB) (or reservoir cubic meters,
res m^3) if, after two years of production, averag... | 66.74 ×10^6 RB (10.61 × 10^6 res m3) | 4 × 10^4 RB (6.36 × 10^3 res m3) | 66.7 ×10^6 RB (10.6 × 10^6 res m3) | 80 × 10^3 RB (12.72 × 10^3 res m3) | D | Not supported with pagination yet |
SPE MCQ Dataset
SPE MCQ, which stands for Society of Petroleum Engineers Multiple Choice Question, is a dataset which consists of 100 MCQs of petroleum engineering topic. This MCQ bank is originally from the Study Guide for the SPE Petroleum Engineering Certification Examination (4th ed) (2011)
The MCQ has diverse topics, such as common knowledge, drilling, completion and production, and reservoir engineering.
The dataset has 5 columns:
- number: Question number
- question: Question
- A: Choice A
- B: Choice B
- C: Choice C
- D: Choice D
- correct_answer: The correct answer
- figure: The reference figure or table if the question has
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