Method and device for predicting spatial distribution of target hydrocarbon source rock

The invention discloses a target hydrocarbon source rock space distribution prediction method and device. The method comprises the following steps: acquiring superposed seismic data and hydrocarbon source rock space distribution of a hydrocarbon source rock stratum in a target exploration area, and establishing at least one geological model according to geological background information and seismic data of the target exploration area; according to at least one geologic model and the hydrocarbon source rock spatial distribution, establishing a first lithologic density curve in the hydrocarbon source rock spatial distribution for each geologic model; determining a target Chi angle according to the first lithologic density curve and the superposed seismic data; determining a second lithologic density curve according to the target Chi angle; according to the second lithologic density curve, target hydrocarbon source rock space distribution in the target exploration area is predicted. By adopting the technical sch