Research Of Complex Lithology Identification Method And Reservoir Classification In Wunan Area In Hailar Basin

Hailar Basin is composed of a number of depression,in which there have been new discovers in Wuerxun depressin in Wunan area in the exploration and development during the past two years,with a very large explotation potential.There are complex lithology, many rock types, volcanic clastic reservoir in complex mineral composition, content of the reservoir in the tuff and pyroclastic components gradually increased with burial depth in Wunan area in Hailar Basin ,and the changes in range, the conventional test Well logging data is difficult to identify the response of the main lithologic factors. In Through the Wunan core of 31 wells and thin section observations based on the results of the study area, the major lithology logging response to sum up the value of log response characteristics are extracted, establish the lithology identification chart. Because of complex lithology reservoirs varied mineral assemblages of rocks of different lithology in the conventional logging having a significant response difference layers bit difficult to determine the exact parameters of the skeleton Wunan area in Hailar Basin ,it cause partial accuracy of reservoir parameters low. In view of the reservoir for the same log response with different lithology, different lithology and logging features with the same characteristics of difficulties logging lithology recognition problem in Wunan area, the use of laboratory pressing hydrargyrum data, starting from the pore structure , combined with core analysis porosity and permeability parameters and build laboratory analysis of the oil reservoir classification interpretation chart.