A method for preparing shale cuttings samples for micro-indentation experiments

Abstract

The invention discloses a method for preparing a shale cuttings sample for a micron indentation experiment, comprising the following steps: S1, preparing an epoxy resin cement; S2, cementing the sample: preparing a column for shale cuttings pouring rubber mold, and pour the cement prepared by S1 into the mold; put the screened rock chip samples into the prepared mold filled with cement, so that it is just completely wrapped by the cement; put the prepared mold 1. Put the cement and cuttings samples into a vacuum drying oven and cure them at 60-65°C for 3-5 hours; S3. Cut and polish the cemented solid containing shale cuttings prepared in S2 to make the surface of the samples smooth and flat ; S4. Conduct a comparative experiment to verify whether the prepared samples meet the experimental requirements. The invention has the advantages that the prepared shale cuttings sample retains the original physical and chemical properties of the rock, and the obtained rock mechanical parameters 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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