Preparation method of shale rock fragment sample for micron indentation experiment

Abstract

The invention discloses a preparation method of a shale rock fragment sample for a micron indentation experiment. The preparation method comprises the following steps: S1, preparing an epoxy resin adhesive; S2, adhering a sample: preparing a columnar rubber mold for pouring shale rock fragments and pouring the adhesive prepared by S1 into a mold; putting the screened rock fragment sample into theprepared mold filled with the adhesive, so as to completely cover the rock fragment sample with the adhesive; putting the prepared mold, the adhesive and the rock fragment sample into a vacuum dryingbox; curing at 60 to 65 DEG C for 3 to 5h; S3, carrying out cutting and polishing treatment on an adhered solid containing the shale rock fragments in S2, and treating the surface of the sample untilthe surface is smooth and flat; S4, carrying out an comparison experiment and proving whether the prepared sample meets experiment requirements or not. The preparation method disclosed by the invention has the advantages that the prepared shale rock fragment sample keeps original physical and chemical properties of rocks and obtained mechanical parameters of the rocks are accurate.

Description

technical field [0001] The invention relates to the field of petroleum exploration, in particular to a method for preparing shale cuttings samples for micron indentation experiments. Background technique [0002] Today, shale gas, as a new type of clean energy for global oil and natural gas exploration and development, has relatively abundant reserves, wide distribution and long production life in the world. In recent years, social development has greatly increased the demand for oil and gas, and shale gas, an unconventional oil and gas resource, has become one of the main oil and gas resources exploited by people. Under the awareness of environmental protection, the society urgently needs clean energy, and the price of natural gas is gradually rising. Shale gas in unconventional natural gas has become the main exploration target of unconventional oil and gas resources in the world. [0003] Most of the shale in the Chinese area is composed of filling inclusions and sedimen...

AI Technical Summary

Problems solved by technology

However, for the drilling of shale gas horizontal wells, due to the cost of shale drilling, the method of indoor core testing is rarely used to obtain mechanical parameters for engineering problems such as wellbore stability.

The logging data interpretation method is generally to establish a model of mechanical parameters with parameters such as acoustic logging and density logging, and then predict and obtain effective data. However, logging in shale horizontal wells is difficult and expensive, and a large amount of shale gas Horizontal wells have not obtained effective logging data, making it difficult to apply this method effectively

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