# Study on Multi-Scale Coral Reef Pore Structure Identification and Characterization
###### Abstract  
In order to more accurately realize the automatic identification and quantitative characterization of coral reef multi-scale pore structure, this paper has carried out such research. On the basis of using multiple information acquisition technology, it can effectively collect field measured data and indoor observation data to form a high-precision digital image of the development characteristics of multi-scale coral reef pore structure. By constructing the multi-scale structure information correlation and fusion function of coral reef pore structure, it can formulate the positioning and search strategy for the key areas of coral reef pore structure development characteristics. In this paper, a fine identification and quantitative characterization method suitable for the pore structure of \"millimeter-micron-nanometer\" is formed. At the same time, combined with the actual project requirements, the multi-scale pore structure feature area location method of coral reef is constructed, which combines the distribution characteristics, variation characteristics, fractal characteristics and shape characteristics in a certain range, and realizes the search of pore key areas between different scales and different regions of the same scale through the similarity matching algorithm, which can effectively realize the automatic search of key areas in the \"millimeter-micron-nanometer\"-scale image of coral reefs. Finally, the correctness and feasibility of this method are verified by multi-angle example data comparison. It shows that this method can effectively solve the productivity prediction and evaluation problem of coral reef oil and gas reservoirs. c 20221 2022 20 May 2  
and the protection of marine rights and interests. They can be built into the support and front base for modern deep-sea pelagic fisheries, marine energy development, seabed oil and gas resource development, tourism, transportation and national defense. Scientific research on coral reefs has extremely important strategic significance, scientific significance and economic value [5; 6]. As a new field of global oil and gas resources development, marine oil and gas resources have become an important replacement area of global oil and gas resources [7; 8; 9]. Coral reef is a marine carbonate rock composed of reef building corals through diagenesis. The pores are relatively developed, with good permeability and a high abundance of organic matter. It is an ideal oil and gas reservoir [10]. In the study of coral reef skeleton limestone, pore structure is an important parameter affecting the physical, mechanical and chemical properties of reservoir rocks. Pore shape and pore size distribution have a great impact on oil and gas migration and reservoir capacity. Because the pores of coral reefs are the main reservoir space, determining the scale, structure and distribution characteristics of pores can contribute to scientific and reasonable stratigraphic division and reservoir evaluation, which can provide basic data for the efficient development of coral reefs as oil and gas reservoirs. The strong heterogeneity of coral reef pores and the complex diagenetic process of reef limestone led to a large number of irregular pore characteristics in coral reef strata. The core of coral reef reservoir interpretation and evaluation is to determine its pore space characteristics and master the development characteristics of coral reef pore structure, which is of great significance for reservoir evaluation [11]. The key problem of oil and gas reservoir exploration and development is the structural characterization and morphological description of reservoir space. The development characteristics of coral reef pore structure are diverse, complex and heterogeneous, which makes the quantitative characterization of coral reef pore structure very challenging.