Study Of Fine Stratigraphic Interpretation In YanQing Fault Basin

This study area is located in the Yanqing fault basin formed in the late Cenozoic, the basin of the Quaternary covers complexly, thickly, and the thickness changes, making interpretation more difficult. It had already implemented many geophysical exploration only involved in the structural interpretation, so it did not form a system of more mature strata, lithological interpretation.Currently, a variety of methods in oil and gas exploration seismic interpretation achieved great success, but in the Cenozoic stratigraphic interpretation in instances were rare. Therefore, in this study, we first study stratigraphic interpretation methods, and then for the Yanqing fault basin interpretation using the following method: Layer of the study area were divided, according to drilling data for the Cenozoic and Jurassic, and Jurassic strata between Jixian System by geological and seismic data, the method of combining unconformity stratigraphic division; Cenozoic rocks fine division of strata, only the actual data in the area of drilling data, log data is not the case, the region of this study, combined with geological and drilling data, the energy profile in the reflecting layer on the division of work, and the combination of seismic attributes , sub-frequency technology to predict the distribution of Cenozoic rocks, through previous experience, choose the more sensitive to changes in lithology of seismic attributes is - the absolute amplitude and instantaneous frequency. At the same time test inversion method using trace integration, according to its principles, said the relative integral inversion method can be impedance section, the distinction between the interface impedance or fault interpretation has a guiding role in the work.Finally, the study area rich in geothermal resources and favorable reservoir located in the thick dolomite fractured Jixian System, the reference method of fractured oil and gas exploration, research using azimuth AVO to predict the location of underground cracks, looking to hot water.Through the method of seismic interpretation was selected for interpretation of the study area, study area of Yanqing 2D and 3D seismic data do lithology interpretation, follow-up for the interpretation of the work area has some reference value.