Abstract:The Karst fracture-cave body (FCB) is the most important drilling target in Tarim carbonates. The influence of the FCB on reflection characteristics merits great efforts of research. The early research efforts usually focused on a single factor influence. Using numerical simulation based on acoustic wave equation, we discuss in this article many influence factors including location, shape, porosity, inner structure, etc. It is confirmed that the main influence factors on reflection amplitude are FCB's width, total porosity, and inner structure. Therefore, it is believed that quantitative reservoir characterization and porosity volume calculation are more practical than separate estimations of the porosity and the bulk volume.
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