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Identification method of andesine in fine settlement (sedimentary rock)

An identification method and sediment technology, applied in the field of meso-feldspar and content, can solve the problems of high cost, slow speed, indistinguishability, etc.

Active Publication Date: 2012-02-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the speed is slow, the cost is high, and the cycle is long
Moreover, it is impossible to analyze the total amount of plagioclase in sedimentary rocks at any time for every sample. At present, the total amount of plagioclase can only be determined, and it specifically belongs to albite, feldspar, meso-feldspar, and arganite in plagioclase. Feldspar, double feldspar and anorthite cannot be distinguished

Method used

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  • Identification method of andesine in fine settlement (sedimentary rock)
  • Identification method of andesine in fine settlement (sedimentary rock)
  • Identification method of andesine in fine settlement (sedimentary rock)

Examples

Experimental program
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Embodiment Construction

[0035] Taking the 1588.0-meter rock sample of Pingdiquan Formation (P2p) in Well H2452 of Zhundong Huoshaoshan Oilfield as an example

[0036] Specific steps:

[0037] (1) Sampling is taken first, and rock samples with a diameter of 25mm×25mm×5mm or a diameter of 25mm×5mm are cut from each sample, and the remaining samples are used as hand specimens.

[0038] (2) Gluing: heat and dry the rock samples that need to be glued in an electric oven at a temperature between 50°C and 60°C according to the number. Use rosin glue (preparation of rosin glue: weigh rosin and turpentine according to the ratio (mass ratio) of 3:2, put it in an enamel cup, heat it on a sand bath furnace, and keep stirring with a glass rod, so that the rosin is completely melted Turn off the electric furnace. Cool down and set aside.) Glue the rocks until the glue is baked until it can be crushed with fingers and the color of the glue is brown, then turn off the induction cooker, or directly use "502" glue to...

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Abstract

The invention relates an identification method of andesine in a fine settlement (sedimentary rock), comprising the following steps: putting a rock slice under an orthogonal polarizing microscope; putting the object under test in an extinction position; rotating the objective table 45 DEG to allow the long axis of the object under test to be angled 15 DEG from the cross wire of the second quadrantand the fourth quadrant in the eyepiece of the microscope; inserting a gypsum test panel; allowing the long axis, which is a small refractive index, of the object under test to be overlapped with a small refractive index X of the gypsum test panel, acquiring andesine which has an interference color of blue, and detecting the content of andesine that has an interference color of blue with area visual assessment percentage method; then rotating the objective table 90 DEG to allow the long axis of the object under test to be angled 15 DEG from the cross wire of the first quadrant and the third quadrant in the eyepiece of the microscope; allowing the long axis, which is a small refractive index, of the object under test to be overlapped with a large refractive index Z of the gypsum test panel, acquiring andesine which has an interference color of yellow, and detecting the content of andesine that has an interference color of yellow with area visual assessment percentage method. According to the invention, the andesine in the fine-particle settlement (sedimentary rock) can be identified rapidly and accurately.

Description

Technical field: [0001] The invention relates to a method for rapidly and accurately identifying the meso-feldspar and its content in fine deposits (rocks) (particle diameter less than 0.03mm) under a microscope. Background technique: [0002] Under the microscope, it is not easy to distinguish and identify meso-feldspar and clay minerals with fine particle size (particle size less than 0.03mm). Numerous fine feldspars and clay minerals are aggregated under the microscope and distributed in a directional manner. Each fine mineral is in the shape of a needle point. It is impossible to distinguish the shape and interference color of a single mineral, and it is easy to confuse. Identify fine meso-feldspar as fine clay mineral, or identify fine meso-feldspar as fine meso-feldspar. Clay minerals are an important component of argillaceous rocks, and meso-feldspar is an important component of andesitic volcanic tuff. Whether the rock is dominated by meso-feldspar is the main basi...

Claims

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Application Information

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IPC IPC(8): G01N21/45G01N1/32
Inventor 张丽霞李培俊朱喜萍宋新萍
Owner PETROCHINA CO LTD
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