Stability evaluation and layout optimization method of deep anhydrite caverns in oil storage environment

Abstract

The invention discloses a deep anhydrite cavern group stability evaluation and layout optimization method in an oil storage environment. The evaluation method involved in the invention comprises four parts, i.e. deep anhydrite surrounding rock engineering geology characteristic analysis, deep anhydrite surrounding rock mechanical parameter analysis, reservoir cavern group stability study and cavern layout optimization design respectively. The method provided by the invention applies Hoek-Brwon empirical criterion and geological strength index to clarify the reduction rule of anhydrite surrounding rocks and rock mass mechanical parameters, and provides a parameter basis for cavern group surrounding rock stability numerical simulation. The invention puts forward an element safety factor method, and combines surrounding rock stress field, displacement field and plastic zone to comprehensively evaluate the cavern group surrounding rock stability. The method provided by the invention can be used for optimizing the layout scheme of deep anhydrite cavern groups in an oil storage environment, improving the oil storage efficiency of anhydrite caverns, and evaluating the stability of deep anhydrite cavern groups in an oil storage environment, and provides a reference method for scientific verification of deep anhydrite forewinning oil storage adaptability.

Description

technical field [0001] The invention relates to a method for evaluating the stability of deep anhydrite caverns in an oil storage environment, and also relates to a method for optimizing the layout of oil storage caverns. Background technique [0002] Petroleum, known as "industrial blood", is an important strategic resource for national economic development. Compared with traditional surface oil storage methods, underground oil depots have the advantages of being safer, more environmentally friendly, saving land resources, and reducing project costs. At home and abroad, there have been a lot of applications and researches on underground oil depots including underground water-sealed caverns and deep salt rock caverns, but there is no precedent for using deep anhydrite gobs to store oil. The stability and sealing of caverns are the key factors determining the success or failure of underground oil and gas storage. No matter what kind of underground oil storage caverns, the ev...

AI Technical Summary

Problems solved by technology

However, there is currently no systematic evaluation method to study the stability and long-term stability of oil storage caverns in deep gypsum mines.

At the same time, scholars at home and abroad have relatively mature research on the optimal layout of mining caverns, but there is little mention of the optimization and evaluation system of deep anhydrite mining caverns considering the oil storage environment

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