IDENTIFYING ROCKS DEEP UNDERGROUND

1

• IDENTIFYING ROCKS DEEP UNDERGROUND

2

• IDENTIFYING ROCKS DEEP UNDERGROUND
• HOW CAN IT BE DONE ??

• BUT FIRST A LITTLE VOCABULARY
• RESERVOIR ROCK
• The rock in which the petroleum and natural gas
  is stored until it is discovered and pumped to
  the surface. THIS CAN ONLY HAPPEN BECAUSE OF . .
  . .
• POROSITY
• The volume of storage space available in the
  rock. This is the space between the grains of
  rock or sand or other particles.
• CAP OR SEAL ROCK
• A Rock with little or no porosity. That will not
  let the petroleum leak through to other rock
  layers.
• Keeps petroleum in the reservoir rock.

3

• IDENTIFYING AND DELINEATING ROCK LAYERS FROM A
  WELL LOG
• TWO STEPS
• Identify the rock layers using the rock layer
  symbols.
• Identify the pore liquids by using the color
  code.

4
WHAT DOES A WELL LOG LOOK LIKE ?? CLICK HERE
5
ROCK LOG
6
LIQUID LOG
GAS
OIL
The oil water contact It is the place where the
oil and water meet
WATER
7
EXAMPLE
SHALE
LIMESTONE
SHALE
SANDSTONE
SHALE