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A method for identification of fine-grained volcanic ash tuffaceous mudstone

An identification method, a technology of volcanic dust, applied in the direction of testing moving fluid/granular solids, etc., can solve the problem of affecting the discovery of new oilfields in the direction of oil exploration and development, the inability to discuss reservoir properties, and the inability to determine lithology, electrical properties, and oiliness. and physical relations

Active Publication Date: 2017-10-17
PETROCHINA CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] If the characterization of lithology is inaccurate, it is impossible to discuss the properties of the entire reservoir, and it is also impossible to determine the relationship between lithology, electrical properties, oil content and physical properties, thus seriously affecting the direction of oil exploration and development and new oil fields. discovery

Method used

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Embodiment Construction

[0019] In order to understand the present invention in depth, the present invention will be described in detail below in conjunction with specific examples.

[0020] Taking the 1,450.38-meter rock sample of the Pingdiquan Formation (P2p) in Well H065 of the Zhundong Huoshaoshan Oilfield as a sample, the following steps were used to identify the fine-grained volcanic ash tuffaceous mudstone and its content in the rock thin section. The specific steps include:

[0021] 1. Place the rock thin section of the clastic rock sample in the field of view of the crossed polarizing microscope;

[0022] 2. Choose a 5x objective lens;

[0023] 3. Turn the stage to the right by 45 degrees, so that the minerals to be tested are in the first and third quadrants and are in the extinction phenomenon;

[0024] 4. Insert the gypsum test board at the corresponding position of the microscope;

[0025] 5. Determine the interference color of the mineral x1 in the first and third quadrants to be the ...

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PUM

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Abstract

The invention relates to an identification method of volcanic ash tuffaceous mudstone at particle level, which belongs to the technical field of rock variety identification. The specific steps include: placing the rock thin section of the clastic rock sample in the field of view of the crossed polarizing microscope, so that the minerals to be tested are placed in the first and third limits and are in the extinction phenomenon; insert a gypsum test plate at the corresponding position of the microscope Determining the first-level gray-white interference color of the mineral x1 in the first and third quadrants and the purple interference color of the mineral y1 in the first and third quadrants; the percentage content and the first-level gray-white interference color of the first-level gray-white interference color of the mineral x1 in the first and third quadrants of the visual field Measure the percentage of purple interference color of mineral y1; determine the first-level gray-white interference color of mineral x2 in the second and fourth quadrants and yellow interference color of mineral y2 in the second and fourth quadrant; The percentage content of gray-white interference color x2 and the percentage content of yellow interference color y2. This method can provide the basis for the direction of oil exploration and development and the discovery of new oil fields, and has practical value.

Description

technical field [0001] The invention relates to an identification method of particle-level volcanic ash tuffaceous mudstone, which belongs to the technical field of rock variety identification, and a method for quickly and accurately identifying particle-level (particle diameter less than 0.01mm) volcanic ash tuffaceous mudstone under a polarizing microscope method. Background technique [0002] At present, the identification method of particle-sized volcanic ash tuffaceous mudstone in China is based on the Petroleum and Natural Gas Industry Standard SY / T5368--2000 "Identification of Rock Thin Sections" of the People's Republic of China. [0003] The disadvantage of this method is that it is difficult to distinguish between fine-grained volcanic tuff and argillaceous rock. Because the mudstone debris and volcanic ash tuffaceous debris in the particle-sized volcanic ash tuffaceous mudstone are very fine, the particle size is less than 0.01mm, and they are distributed in aggr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/85
Inventor 张丽霞陈春勇谢建勇向辉王辉
Owner PETROCHINA CO LTD
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