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Coring and Coring Analysis

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Geology

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What is Coring?
The term is applied to the technique whereby relatively large
cylindrical sample of rock are removed from their natural state and
brought to the surface for physical examination.
Objective of Coring:
During drilling, more precise information may be necessary
concerning the lithologic and fluid-bearing characteristics of the
formation before a decision can be made to complete the well and
spend any additional finances on equipment and services. One of the
most reliable sources of information on the lithologic and fluid-
bearing characteristics of a reservoir is an actual sample of the
reservoir rock, with the fluid contained in it.
Normally the most important information desired from the coring
operation
concerns:
1) Porosity:
- Porosity measures the capacity of the reservoir rock to hold
fluids.
- A porosimeter is the instrument used to determine porosity.
2) Permeability:
- Permeability measures the ease by which a fluid can flow
through the reservoir rock.
- It indicates whether the formation fluids will be able to flow at
rates fast enough to permit economical production of the
hydrocarbons

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2) Miscellaneous:
Cores are also obtained for a variety of other reasons:
- Geological studies
- Studies of fracture patterns in fractured formations
- Studies of formations to obtain better well completion
- Paleoclimatic and paleontological studies.

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What is Coring? The term is applied to the technique whereby relatively large cylindrical sample of rock are removed from their natural state and brought to the surface for physical examination. Objective of Coring: During drilling, more precise information may be necessary concerning the lithologic and fluid-bearing characteristics of the formation before a decision can be made to complete the well and spend any additional finances on equipment and services. One of the most reliable sources of information on the lithologic and fluid-bearing characteristics of a reservoir is an actual sample of the reservoir rock, with the fluid contained in it. Normally the most important information desired from the coring operation concerns: 1) Porosity: Porosity measures the capacity of the reservoir rock to hold fluids. A porosimeter is the instrument used to determine porosity. 2) Permeability: Permeability measures the ease by which a fluid can flow through the reservoir rock. It indicates whether the formation fluids will be able to flow at rates fast enough to permit economical production of the hydrocarbons 2) Miscellaneous: Cores are also obtained for a variety of other reasons: Geological studies Studies of fracture patterns in fractured formations Studies of formations to obtain better well completion Paleoclimatic and paleontological studies. CONVENTIONAL CORING: Continuous sections of rock are acquired through this method. Firstly, the drillin ...
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