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...

Examples

Embodiment 1

[0061] In recent years, many high-yield industrial airflows have been drilled in the Lower Triassic Feixianguan Formation and the Upper Permian Changxing Formation in the northeastern Sichuan region, represented by Puguang, Luojiazhai, Dukouhe, Huanglongchang, Wubaiti and Gaofengchang. The discovery of a series of large and medium-sized marine carbonate gas fields in the Feixianguan Formation and Changxing Formation is a major breakthrough in the field of marine carbonate oil and gas exploration in southern China. Most of the high-quality reservoirs are developed in high-degree dolomitization. in the reef and shoal formations. In this example, aiming at the research hotspot of the pore development mechanism of carbonate rock reservoirs, the simulation experiments of different types of carbonate rock samples are carried out to quantitatively evaluate the process of carbonate rock dissolution and the dissolution effect.

[0062] See figure 1 As shown in the flow chart, this emb...

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...

Examples

Embodiment 1

[0061] In recent years, many high-yield industrial airflows have been drilled in the Lower Triassic Feixianguan Formation and the Upper Permian Changxing Formation in the northeastern Sichuan region, represented by Puguang, Luojiazhai, Dukouhe, Huanglongchang, Wubaiti and Gaofengchang. The discovery of a series of large and medium-sized marine carbonate gas fields in the Feixianguan Formation and Changxing Formation is a major breakthrough in the field of marine carbonate oil and gas exploration in southern China. Most of the high-quality reservoirs are developed in high-degree dolomitization. in the reef and shoal formations. In this example, aiming at the research hotspot of the pore development mechanism of carbonate rock reservoirs, the simulation experiments of different types of carbonate rock samples are carried out to quantitatively evaluate the process of carbonate rock dissolution and the dissolution effect.

[0062] See figure 1 As shown in the flow chart, this emb...

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