A method and device for predicting the distribution of carbonate rock dissolution pores

Abstract

The invention provides a method and device for predicting the distribution of dissolved pores in carbonate rocks. The method for predicting the distribution of dissolved pores in carbonate rocks includes: step 1, determining the development range of dissolved pores in the quasi-contemporaneous period; step 2, determining The development range of buried dissolution pores; step 3, predicting the distribution area of ​​dissolution pores. The method and device for predicting the distribution of carbonate rock dissolution pores provided by the present invention clarifies the characteristics and distribution rules of penecontemporaneous dissolution pores, epigenetic karst dissolution pores and buried dissolution pores based on dissolution simulation experiments, and integrates dissolution simulation experiments, Lithofacies and paleogeography restoration, sedimentary paleogeomorphology reconstruction, fault system identification and other technologies have formulated the types and specifications of relevant basic maps, established a prediction process, and realized qualitative-semi-quantitative prediction of the distribution of carbonate rock dissolution pores. High-quality reservoir evaluation provides technical support.

Description

technical field [0001] The invention relates to a method and device for predicting the distribution of dissolved pores in carbonate rocks, and belongs to the technical fields of geological exploration and oil and gas exploration. Background technique [0002] Due to the high chemical activity of carbonate rocks, in addition to sedimentary primary pores (intergranular pores, body cavity pores, etc.), dissolution pores are very important components of carbonate rock storage space, especially after long-term diagenetic superimposed reformation. of ancient carbonates (Clyde H. Moore, 2001). Dissolution pores can be formed in sediment exposure and dissolution related to high-frequency sea level changes (Shen Anjiang et al., 2015), or in rock exposure and karstification related to tectonic movements (Zhao Wenzhi et al., 2013). In burial dissolution related to organic acids, TSR, and hydrothermal fluids (Zhang Shuichang et al., 2011). Different genetic mechanisms determine the di...

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Problems solved by technology

However, there is no well-formed and reliable prediction method and process for the distribution of dissolved pores in carbonate rocks

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