Technology & Digital Tools Flashcards

A driller receives a digital print of a gamma-ray log. High gamma-ray counts (right deflection) most often indicate:

Answer: Shale, clay, or other radioactive-mineral-rich formations

Gamma-ray logs detect natural radioactivity; shales and clays contain potassium and thorium-bearing minerals that produce high gamma-ray readings.

Which communication protocol is most commonly used to transfer data between downhole data loggers and surface computers in modern monitoring wells?

Answer: SDI-12, Modbus, or wireless telemetry (cellular/satellite)

Modern water level loggers and sensors use SDI-12, Modbus RTU, or wireless telemetry (cellular/satellite) to transmit data to surface control systems or cloud platforms.

When using hydraulic fracturing simulation software to plan a well stimulation program, what input parameter most directly controls predicted fracture half-length?

Answer: Total fluid volume pumped and pump rate

Fracture half-length is primarily controlled by the total volume of fluid injected and the pumping rate, as more fluid at higher rates extends the fracture further from the wellbore.

A driller uses drone-mounted LiDAR to survey a well site before construction. What key benefit does LiDAR provide over traditional ground surveying?

Answer: It creates a precise 3D terrain model for site planning, drainage, and access road design

LiDAR (Light Detection and Ranging) rapidly generates high-resolution 3D point-cloud terrain models, enabling precise site layout, grading plans, and stormwater management design.

In digital driller's logs, what does 'rate of penetration (ROP)' data help the geologist or driller interpret?

Answer: Relative formation hardness and potential formation boundaries

ROP (feet per hour or minute) increases in soft formations and slows in hard rock, providing a continuous indirect indicator of formation changes that helps identify lithologic boundaries.

A contractor uses project management software with Gantt chart functionality on a multi-well drilling contract. Gantt charts are most useful for:

Answer: Scheduling tasks, tracking dependencies, and monitoring project timelines

Gantt charts visually display project tasks, their durations, dependencies, and current completion status to help contractors manage schedules and resource allocation.

Which geophysical log is most commonly used to accurately measure borehole diameter and detect zones of caving or enlarged borehole?

Answer: Caliper log

A caliper log uses spring-loaded arms that measure borehole diameter at all depths, identifying washed-out zones, caved sections, and intervals suitable for packer placement.