The Gas Cap Reservoir Identification Research

This thesis makes a research into oil pool with gascap by development methods of oil-gas field, development geological method of oil pool and petroleum geological method. The key technique comes into being on the basis of reserves recalculation of Lunan 1 well in shixi exercise section in Xinjiang province. The oil pool of Lunan 1 well first is thought to be a higher saturated extent structural oil pool, But it is found to be an oil pool with a primary gascap instead of a pure oil pool after a further research.The thesis puts the emphasis on the following three parts: identifications of oil pool with gascap, oil-gas-water interface and liquid characters. It adopts production dynamin data and content method of condensate to identify the type of oil pool with gascap, adopts production dynamic data, DRM method and difference of porosity method to identify oil-gas interface, adopts capillary pressure method and pressure data method to identify oil-water interface and adopts element analysis data of gas, liquid analysis test data, shooting data and gas-oil ratio data to identify liquid characters of output in a comprehend way . Both the keystone and difficulty met in the research process of oil pool type of Lunan 1 well are recognitions of lithological electrocharacter physics character and container characters electrocharacter, identification of gas layer of oil pool and classification of two facies system.