A method for identification of fine-grained volcanic ash tuff
An identification method and technology of volcanic dust, applied in the measurement of phase influence characteristics, etc., can solve the problem of inability to discuss reservoir properties, inability to determine the relationship between lithology, electrical properties, oil content and physical properties, and affect the direction of oil exploration and development. Discovery of new oil fields and other problems, to achieve the effect of simple operation method
Active Publication Date: 2017-10-17
PETROCHINA CO LTD
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] 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
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023] In order to understand the present invention in depth, the present invention will be described in detail below in conjunction with specific examples.
[0024] 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 tuff in the rock thin section. The specific steps include:
[0025] 1. Place the rock thin section of the clastic rock sample in the field of view of the crossed polarizing microscope;
[0026] 2. Choose a 5x objective lens;
[0027] 3. Turn the stage 45 degrees to the left, and place the mineral to be tested in the second and fourth quadrants of the microscope eyepiece;
[0028] 4. Insert the gypsum test board;
[0029] 5. Determine the interference color of the mineral x1 in the second and fourth quadrants to be the first-grade gray-white interference color;
[0030] 6. Percentage of primary gray-white int...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to an identification method of particle-level volcanic dust tuff, which belongs to the technical field of rock variety identification. Place the rock thin section of the clastic rock sample in the field of view of the crossed polarizing microscope, select a 5x objective lens, turn the stage 45 degrees to the left, and place the mineral to be tested in the second and fourth quadrants of the microscope eyepiece, Insert the gypsum test plate, measure the interference color of the minerals to be measured in the second and fourth quadrants as the first-grade gray-white interference color, and visually estimate the percentage content of the first-grade gray-white interference color x1 of the minerals to be measured in the second and fourth quadrants; The object stage is turned 90 degrees to the right, so that the minerals to be measured are placed in the first and third quadrants of the microscope eyepiece; the interference color of the minerals to be measured in the first and third quadrants is determined as the first-grade gray-white interference color; The percentage content of the first-order gray-white interference color x2 of the mineral to be tested in the quadrant; if the interference colors of x1 and x2 are both first-order gray-white interference color, and x1=x2>50%, the clastic rock sample is at the particle level Volcanic tuff.
Description
technical field [0001] The invention relates to the technical field of rock variety identification, in particular to a method for rapidly and accurately identifying particle-level volcanic dust tuff under a polarizing microscope. Background technique [0002] At present, the identification method of particle-sized volcanic dust tuff in China is based on the People's Republic of China oil and gas industry standard SY / T5368--2000 "Identification of Rock Thin Sections". [0003] The disadvantage of this method is that it is difficult to distinguish between fine-grained volcanic tuff and argillaceous rock. Because the clasts in the particle-sized volcanic dust tuff and the clay mineral clastics that make up the mudstone are very fine, with a particle size of less than 0.0313 mm, they are distributed as aggregates under a polarizing microscope, and each monomer is needle-point. It is impossible to distinguish the shape and interference color of individual fine minerals, so it is...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/45
Inventor 张丽霞陈春勇向辉朱喜萍李文波
Owner PETROCHINA CO LTD