The Study Of Identifying Partial Reservoir Of Oil-Water Layer In Sanan Research Area

With the development of oil field, Sanan research area has entered into the middle and late period, whose water content rise faster and production reduce speedy, after a long period of development, the remaining recoverable reserves in the reservoir is less, the balance between geological reserves and recoverable reserves is gradually lost, this conflict has become increasingly obvious. The only way to solve these problems, guarantee stability of the production is to look for the new resource and to maximize the development of undeveloped reserves. The reserves of oil-water layer, especially the partial reservoir, which has the potential to exploration, has accounted for an important part of daily reserves. Therefore, in order to solve this problem, ensure the stable production, we conduct the study of identifying partial reservoir of oil-water layer, by using Sanan research area as a typical area.Firstly, the research of core has conducted by the experiment of Rock-Eval technology, evaporation hydrocarbon pyrolysis gas chromatography technology, micro-fluorescence image method act. Then analyze the response characteristics of oil-water layer by combining experiment data with log data, re-determine the depth of oil-water layer of the entire Sanan oil field comprehensively, including Sadong oil-water transition zone, Saxi oil-water transition zone, Nanyi to Nansan block and Nansi to Nanba block. Secondly, determine the relationship between lithology, physical property, electric property and oiliness by analyzing the core, log data and doghouse dope. Thirdly, confirm the lower limit of physical property of partial reservoir by establishing relative permeability curve and economic limit means, mercury intrusion method, experiential statistical method. Then, confirm the lower limit of electric property of partial reservoir by the logging data, identify the partial reservoir accurately, provide a reliable basis for the designation of dynamic adjustment project of late period of oil field.