A cylindrical sample of geological formation, usually reservoir rock, taken during or after drilling a well. Core samples are used for many studies, including the study of drilling fluids and the damage done to them. Although it is expensive and difficult to gather core, it provides valuable information (real porosity values, real permeability values, can be used for experiment test rock and fluid behavior, sedimentological analysis, structural analysis using fractures)
This is carried out when there is a malfunction in the transmission of the gas or suspicion that the quality of the gas is not of the approved standard leading to the necessity to release any quantity of gas remaining in the pipeline into the atmosphere under controlled safety conditions
A vertical view through a volume as opposed to a surface or plan view of a map. Cross sections are useful for displaying the types and orientations of subsurface structures and formations
Laboratory analysis of a core sample that may determine porosity, permeability, lithology, fluid content, angle of dip, geological age, and probable productivity of the formation.
A portion of produced oil that the operator applies on an annual basis to recover defined costs specified by a production sharing contract.
Use of money from saloe of oil and gas to cover expenses
A discrete deposit, usually bounded by a downdip water contact from which gas or oil can be extracted using traditional development practices
A core bit is usually a drag bit often fitted with diamond cutting structures and has a hole in the middle which allows the bit to drill around a central cylinder of rock, which is taken in through the bit and into the core barrel
Under a typical production-sharing agreement, the contractor is responsible for the field development and all exploration and development expenses. In return, the contractor recovers costs (investments and operating expenses) out of the gross production stream. The contractor normally receives payment in oil production and is exposed to both technical and market risks.
Petroleum found in liquid form, flowing naturally or capable of being pumped without further processing or dilution
