Fractal Characteristics of Pore-Throats Structure and Quality Evaluation of Carbonate Reservoirs in Eastern Margin of Pre-Caspian Basin

The Carboniferous reservoir KT-II layer in the Eastern margin of Pre-Caspian Basin was formed open platform sedimentary environment and marked by a complicated pore-throats structure. Understanding main controls on carbonate quality is great significance for classification relevant production prediction. This study focuses revealing structure’s fractal characteristics analyzing mercury intrusion capillary pressure (MICP), with integration radius’ distribution data. relationship between dimensions parameters such as physical properties, median saturation (Pc50) proportion large-size (radius > 0.1 μm) pores demonstrate that lower dimension corresponds not only to core plug samples higher permeability, but also Pc50 large pore-throats. Three classes different qualities were defined according their dimensions, petrophysical properties photomicrograph features, et al. Combined flow profiles from Production Log Tool tests, type behavior revealed, thus providing suggestions middle late stage water flooding adjustment strategy. work provides typical case further comprehensive evaluation it quite meaningful efficiency optimization.