Studied by 4 peoplereservoir rock
a place that oil migrates to and is held underground.
Sandstones
Limestone and /or Carbonate rocks
Examples of reservoir rocks includes:
Coring
processes used to recover formation samples from petroleum reservoirs.
the capacity and ability of the reservoir rock to store and conduct petroleum fluids through the matrix
Physical sample of reservoir rock core is essential to evaluate the two most significant characteristics:
Framework
Matrix
Cement
Pores
Four major components of sandstone
3 to 7
90
Core diameters are typically from _ to _ inches and are usually about ___ feet long
Sidewall Sampling Gun/Tool
can be used to obtain small plugs from the formation.
Sidewall Sampling Gun/Tool
The tool is run on a wireline after the hole has been drilled.
Sidewall cores
useful for identifying hydrocarbons zones, when viewed under UV light.
Whole Core
Provides larger samples
Whole Core
Better and more consistent representation of formation
Whole Core
Better for heterogeneous rocks or for more complex lithologies
Plugs or Sidewall Cores
Smaller samples
Plugs or Sidewall Cores
Less representative of heterogeneous formations
Plugs or Sidewall Cores
Within 1 to 2% of whole cores for medium-to highporosity formation
Plugs or Sidewall Cores
In low-porosity formations, Φ from core plugs tends to be much greater than Φ from whole cores
Plugs or Sidewall Cores
Scalar effects in fractured reservoirs
Porosity
Horizontal permeability to air
Grain density
INFORMATION FROM CORES
Standard Analysis
Vertical permeability to air
Relative permeability
Capillary pressure
Cementation exponent (m) and saturation exponent (n)
INFORMATION FROM CORES
Special Core Analysis
Note
Flashcard