Formation evaluation
In petroleum exploration and development, formation evaluation is used to determine the ability of a borehole to produce petroleum. Essentially, it is the process of "recognizing a commercial well when you drill one". Modern rotary…
Mud logging
Mud logging, in its conventional implementation, involves the rig-site monitoring and assessment of information that comes to the surface while drilling, with the exclusion of data from downhole sensors. The…
How Does Logging-While-Drilling (LWD) Work?
For centuries, drillers (whether drilling for oil or water) have been keeping keen notes of drilling activities. What started as a regular record of drilling depth versus cuttings observed (also…
Well logging
Well logging, field technique used in mineral exploration to analyze the geologic formations penetrated by a drill hole. If the hole has been drilled by using coring techniques, the core…
Core sample
A core sample is a cylindrical section of (usually) a naturally-occurring substance. Most core samples are obtained by drilling with special drills into the substance, such as sediment or rock, with a…
Stratigraphic Traps
Stratigraphic traps are formed as a result of lateral and vertical variations in the thickness, texture, porosity or lithology of the reservoir rock. Examples of this type of trap are…
Petroleum Traps
Two types of petroleum traps are; structural and stratigraphic. Structural traps are formed by deformation of reservoir rock, such as by folding or faulting. Stratigraphic traps are formed by deposition…
Well planning
Well planning is perhaps the most demanding aspect of drilling engineering. It requires the integration of engineering principles, corporate or personal philosophies, and experience factors. Although well planning methods and…
Drilling Methods Used in Oil and Gas Exploration
Oil and gas exploration makes use of several types of drilling methods and platforms based on the type of formations, geographic location, soil type and the like. Here are five of…
Petroleum geochemistry
Petroleum geochemistry is the branch of geochemistry which deals with the application of chemical principles in the study of the origin,generation,migration, accumulation, and alteration of petroleum...(John M. Hunt, 1979). Petroleum is generally…
