Recognition method of primary biogenic dolomite

The invention provides a recognition method of primary biogenic dolomite. The recognition method of the primary biogenic dolomite comprises steps as follows: the surface of a to-be-tested dolomite sample is coated with a conductive film; the to-be-tested dolomite coated with the conductive film is subjected to energy spectrum surface analysis, and a surface distribution diagram of magnesium elements in the to-be-tested dolomite is obtained; whether the to-be-tested dolomite sample is in the primary biogenic type according to the surface distribution diagram of the magnesium elements is judged. With the adoption of the recognition method, whether the dolomite is in the primary biogenic type can be judged quickly and reliably, and the method plays an important instructive role in searching of relatively high-quality dolomite in a compact carbonate reservoir.