Deterministic method for qualitatively identifying top and bottom interfaces of hydrate in sea

The invention discloses a deterministic method for qualitatively identifying the top and bottom interfaces of hydrate in the sea, which includes the following steps: A, getting multiple sensitive attributes for identifying hydrate through seismic reflection characteristic research, AVO, elastic wave impedance inversion and other research methods; B, calculating the weight coefficients of the attributes by analyzing the relationship between the sensitive attributes and hydrate characteristics, and getting attributes used to identify the hydrate characteristics through information fusion analysis; C, studying the spatial correlation between the weighted attributes and sonic skew log variables, and building a model capable of reflecting the hydrate characteristics through a collaborative Kriging algorithm based on the information of the weighted attributes; and D, on the basis of collaborative Kriging modeling, carrying out global optimization broadband constrained inversion to qualitatively identify the top and