摘要：In order to clarify the logging interpretation method of the low-resistivity oil layer of the third member of the Triassic in the Panlong area,establish the logging interpretation method of the old wells,and provide technical support for the potential tapping and efficiency enhancement of the old wells.The lithological and electrical characteristics of the reservoir are analyzed,and the reservoir parameter calculation models of Yan'an Formation and Chang 3 Member are established.The study shows that the Chang 3 Formation is dominated by lithic feldspar sandstone and feldspathic detrital sandstone.The pore type is dominated by remaining intergranular pores,followed by dissolved pores.The porosity is mainly distributed between 9% and 14% with the average value of 10.72%.The permeability is mainly distributed between 0.08-3 x10"3p.m2,and the average value is 1.01x10"3p.m2.By using the method of core scale logging,the pore saturation parameter model of reservoir is established and the formula is verified,and the accuracy meets the calculation requirements of proved reservoir parameters.A second well logging interpretation review was conducted on the old wells,and a total of 19 layers with oil potential were found.
关键词：Sandstone;stratigraphic logging;the second interpretation;Yanchang Formation;Ordos Basin
