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Detailed explanation of the concept of proprietary geological nouns (1)

Release date:2018-09-28  source:中南选矿网  Browse times:606
        K2 mark layer: It is the boundary between length 7 and length 6. There are 3-4 porphyrites with a thickness of less than 1 m and a lithology of brownish gray and yellowish yellow. With horizontal bedding, the electrical characteristics are high acoustic time difference, high natural gamma, high natural potential, low resistance and large caliper.
K3 logo layer: located at the bottom of the long 62. It is an important indicator for controlling the Chang 6 oil layer group. Its thickness is about 1m, and its lithology is brownish gray and microstrip yellow porphyry. With horizontal bedding, the electrical characteristics are high acoustic time difference, high natural gamma, high natural potential, low resistance and large caliper.
 
K4 logo layer: is the boundary between length 6 and length 4+5. It is 40-50m away from the K5 mark layer and has a thickness of less than 1m. The electrical characteristics are high acoustic time difference, high natural gamma, high natural potential, low resistance and large caliper.
 
K4 mark layer: It is the boundary between length 6 and length 4+5. The mark has a thickness of about 1m. The electrical characteristics are high acoustic time difference, high natural gamma, high natural potential, low resistance and large caliper. The upper part is long. 4+5 "40 neck" of "slim neck section".
 
Thin neck section: The upper part of the third section of the extension group is a set of dark gray, gray-black mudstone, carbonaceous mudstone and gray powder, fine sandstone interbed, coal seam line, and the distribution on the area is relatively stable. The electrical characteristics are: the natural potential curve is a finger-like high value, commonly known as the "slim neck" (high-resistance mudstone) segment, which is a regional auxiliary marker layer for the extended group comparison.
 
K5 mark layer: located in the middle of the long 4+5, the electric curve of most wells is obvious, and there are 5-6 layers of single-layer thickness less than 1m peak-like or sharp-knife-shaped acoustic time difference and resistance curve. The electrical characteristics are High acoustic time difference, high natural gamma, high natural potential, low resistance and large caliper.
 
K6 logo layer: the boundary between 4+5 and 3 long. Light gray, taupe fine sandstone with dark mudstone, electrical characteristics are high acoustic time difference, high natural gamma, high natural potential, low resistance and large caliper. K9 mark layer: It is the boundary between length 2 and length 1. The Wa Yaobao coal is gray-green mudstone with fine sandstone, carbonaceous shale and coal seam. Electrical characteristics are high acoustic time difference, high natural gamma, high natural potential, low resistance and large caliper.
 
Auxiliary mark layer: This mark is generally developed in the area. It is located in the middle of the Chang 61 oil layer section and has a thickness of about 1 m. The electrical characteristics are characterized by high acoustic time difference, high natural gamma, high natural potential, low resistance and large caliper.
 
Pore: A space in a rock that is not filled with solid matter.
 
Effective Porosity: The ratio of the sum of the pore volumes in which the fluid flows within the general pressure conditions to the total volume of the rock sample under normal pressure conditions.
 
Permeability: The ability of a rock to pass fluid under a certain pressure differential.
 
Permeable rock: sandstone, conglomerate, porous limestone, dolomite and other reservoirs.
 
Non-permeable rock: mudstone, gypsum, anhydrite, marl and other reservoir caps.
 
Permeability: The ability of a fluid to pass through a rock at a certain pressure differential.
 
The liquid flow rate through the cross-sectional area of ​​the rock per unit time is proportional to the pressure difference and the cross-sectional area, and inversely proportional to the length of the liquid passing through the rock and the viscosity of the liquid.

 
 
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