Method for dividing thermal evolution stages of hydrocarbon source rocks

The invention relates to a method for dividing thermal evolution stages of hydrocarbon source rocks, and belongs to the technical field of oil and gas exploitation. Obtaining a depth and methane content trend curve graph according to the methane content and the corresponding depth; performing thermal evolution stage division on the target area according to a depth and methane content trend curve graph; product proportions of different evolution stages are innovatively used for deducing the evolution stages where the evolution stages are located, all the evolution stages can be accurately divided only through a deep exploratory well, the application range is wide, the problem that a deep part without coring or other data or a new area with less data is solved, and the method is suitable for large-scale production. The depth limit of the evolution stage needs to be speculated in combination with the trend and the change rule, and the evolution trend has a certain error. 本申请涉及一种划分烃源岩热演化阶段的方法，属于油气开采技术领域，方法包括：得到目标