Benyu Su, Yasuhiro Fujimitsu and Chuanli Li
Because there exists a distinct difference of lithology and physical characteristics between conventional clastic reservoirs and low-porosity and low-permeability reservoirs, Archie formula will not be valid for the latter any more. In addition, well logging evaluation of low-porosity and lowpermeability reservoir is one key problem but also the research hotspot in recent years. In this study, Pseudo-Percolation Threshold Theory (PPTT) has been introduced into reservoir evaluation. In this research, it has been proved that the aimed layer is low-porosity and low-permeability by studying the reservoir rock. In addition, Percolation Threshold fJ has been determined by analyzing porosity and permeability of oil-bearing cores and process of geologic evolution. Finally, it has been proved that PPTT is much more reliable than Archie formula for low-porosity and low-permeability reservoir by numerical simulation and oilfield data.
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