The Investigation Of The Parameters Of Marine Carbonate Rock Reservoir In Northeast Sichuan

The anisotropy and low matrix porosity of the marine carbonate rock reservoir in Northeast Sichuan forms complicated reservoir rock and low porosity,which affects a series of reservoir parameters'computation.Therefore correctly classifying and evaluating reservoir takes on difficulties.Applying conventional logging,imaging logging and rich core analytic data,the right interpretation model is very necessary for identifying gas reservoir exactly and improving the precision of calculation of the parameters of the reservoir.Combinating the features of the regional geology,this paper calculates the average cementation exponent m and the average saturation exponent n under the reservoir water salinity,based on the pore type and pore structure.Meanwhile this paper also establishes the well logging interpretation model of the saturation of the formation water adapt to marine reservoir according to water finding data and sealed coring analysis data.Hereby the precision of the interpretation is improved.A series of key techniques were resolved, such as reservoir classification,reservoir parameter computation,fluid character differentiation ,and so on.The practical application of these methods brings satisfactory results.Some examples were also given in the paper.