Abstract: In view of the peripheral "three low" oil fields of daqing have a poor reservoir lithology property, complex oil-water distribution, and only by log data can't meet the needs of the fluid identification, application of geochemical pyrolysis and gas chromatography analysis technology, judging oil and water layers. The application results show that the technology can well solve the problem of complex oil-water distribution area of low permeability oilfield fluid identification. The peripheral oil fields of undeveloped blocks in drilling and perforation scheme establishment has a certain guiding value.