Method for analyzing inorganic matters in shaft blockage of oil and gas well

Abstract

The invention provides a method for analyzing inorganic matters in shaft blockages of oil and gas wells, which comprises the following steps: sequentially carrying out drying treatment and acetone dissolution on a shaft blockage sample, and collecting acetone insoluble substances; carrying out X-ray diffraction analysis on the acetone insoluble substance to obtain an X-ray diffraction analysis result; carrying out fluorescence spectrum analysis on the acetone insoluble substance to obtain a fluorescence spectrum analysis result; and according to the X-ray diffraction analysis result and the fluorescence spectrum analysis result, determining the components and the content of inorganic matters in the wellbore blockages. According to the method for analyzing inorganic matters in shaft blockages of oil and gas wells, the method can accurately and comprehensively measure the total proportion of inorganic matters, the components of the inorganic matters and the content of each component in the wellbore blockage, provides technical support for wellbore blockage mechanism research, blockage removal mechanism research, blockage removal process selection and blockage removal liquid optimization, and finally realizes low cost and high efficiency of blockage removal operation.

Description

technical field [0001] The invention relates to a method for analyzing inorganic substances in wellbore blockages of oil and gas wells, in particular to a method for analyzing and determining the composition and content of inorganic substances in wellbore blockages, which belongs to the experimental method of workover in the oil and gas development process . Background technique [0002] Inorganic substances such as scale, formation sand, corrosion products and barium sulfate are the main factors causing most wellbore plugging. Wellbore clogging will lead to a significant reduction in oil and gas production, which will affect the development of oil and gas fields and cause huge economic losses. Therefore, preventing wellbore clogging and solving oil well clogging is an important issue faced by various oil fields. The analysis of the components and content of wellbore plugging is the premise of studying the mechanism of wellbore plugging and plugging removal, the basis for s...

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Problems solved by technology

[0006] The X-ray diffraction analysis method is mainly carried out in accordance with the Petroleum and Natural Gas Industry Standard SY / T 5163-2010 "X-ray Diffraction Analysis Method for Clay Minerals and Common Non-clay Minerals in Sedimentary Rocks". Although a single X-ray diffraction analysis method can analyze some The composition and content of inorganic substances, but the accuracy and comprehensiveness of the data cannot be guaranteed, and generally need to be combined with other methods

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