An Analysis Method of Carbonate Rock Dissolution and Dissolution Effect

Abstract

The invention provides an analysis method of the corrosion action and the corrosion effect of a carbonate rock. The method comprises the following steps: detecting petrologic parameters, geological fluid characteristics and geological background parameters of a reservoir stratum of the carbonate rock; selecting a plunger sample, and preparing the plunger sample into a diagenetic fluid; performing weighing, physical property analysis, CT scan analysis and microscopic property analysis on the sample before experiment; performing a corrosion simulated experiment on the carbonate rock, and collecting the reaction generated liquid; performing the physical property analysis, the CT scan analysis and the microscopic property analysis on the sample after experiment; analyzing the content of Ca<2+> and Mg<2+> of the generated liquid; analyzing the corrosion action of the carbonate rock under different controlling factors, determining a three-dimensional structure and a microcosmic pattern of representation of a corrosion hole of the carbonate rock, and quantitatively assessing the corrosion hole of the carbonate rock and the communicated property evolution. By the method, the corrosion action and the corrosion benefits of the carbonate rock from an earth surface to the deep burying environment can be analyzed, and more accurate analytical data is provided for assessing and forecasting the favorable reservoir stratum of the carbonate rock.

Description

technical field [0001] The invention relates to petroleum geological experiment analysis technology, in particular to an analysis method for comprehensively evaluating carbonate rock dissolution and dissolution effect. Background technique [0002] Exploration practice shows that carbonate oil and gas fields are an important part of global oil and gas. Dissolution secondary pores and caves formed by carbonate rocks on the surface and during burial are important oil and gas storage spaces, and are also one of the important characterizations of high-quality carbonate rock reservoirs. In order to further understand the evolution mechanism of carbonate dissolution pores (cavities) and connectivity properties, the conditions, processes and controlling factors of carbonate dissolution have become a hot research topic for petroleum geologists. [0003] The existing analysis technology of carbonate rock dissolution is relatively simple, or the dissolution rate experiment of a singl...

AI Technical Summary

Problems solved by technology

In terms of the analysis of experimental results, the analysis content of the existing technology is relatively single, only focusing on the analysis of the change of solution components and rock sample quality, comparing the dissolution speed or amount of mineral components in carbonate rocks, and seldom considering the internal pores of rock samples. - the evolution of caves and fractures, not to mention the quantitative analysis of changes in carbonate rock dissolution pores (caves) and connectivity properties, and the latter is the core content of carbonate rock oil and gas energy storage, productivity evaluation and favorable reservoir prediction, Therefore, the traditional analysis methods of carbonate rock dissolution and dissolution effects have certain limitations.

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