Abstract：Igneous rocks were developed in Funing Formation that is main target of exploration in Sizau area of Hai'an sag, Subei basin.The commercial oil flow was acquired in basal of E1f2 and diabase of E1f3.The igneous distribution in the region is complex and the quality of seismic data is poorer because of igneous influence, which makes accurate identification of igneous rock difficult if only by using seismic data.Through analysis of the feature of seismic sections and logging response of igneous reservoir in studied region, the paper uses gamma and deep lateral resistivity log curves to create pseudo acoustic curves and carries out high-resolution parameters inversion on the basis of taking the inversion of high-resolution wave impedance, gamma pseudo impedance and pseudo impedance of deep lateral resistivity as carriers.On that basis, using Bayes multi-parameter comprehensive identification method to carry out multi-parameter information combination, forming combining data volume and predicting igneous planar and special distribution feature.It is shown by practical data that multi-parameter combining technique can effectively use the results of wave impedance inversion and parameter inversion and more accurately reflect the igneous variation feature.
