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洪法尔舒特凹陷下白垩统巴彦花样泥岩孔隙度与泥岩干酪根镜质体反射率（R°）之间存在密切关系。经对比发现该泥岩孔隙度与镜质体反射率之间的关系与幂函数最为接近。本文根据该幂函数关系先由泥岩的地震速度转换出孔隙度，然后从孔隙度计算出镜质体反射率，最终定量地圈定凹陷主力烃源岩的未成熟区和成熟区，为近源圈闭的选择提供评价依据。这种由地震信息直接测定有机质热成熟度的方法，对于勘探程度较低尤其是钻井稀少的盆地，有着较高的使用价值。
There is a close relationship between the porosity of the Lower Yanan-Putan pattern mudstone and the vitrinite reflectance (R °) of the mudstone in the Hongfalshut Depression. It is found by comparison that the relationship between porosity and vitrinite reflectance is closest to the power function. In this paper, the porosity is converted from the seismic velocity of the mudstone according to the power function first, then the vitrinite reflectance is calculated from the porosity, and the immature and mature regions of the main source rock of the depression are quantitatively delineated. The choice provides the basis for evaluation. This method of directly determining the thermal maturity of organic matter from seismic information has a high value for use in basins with low exploration levels, especially in sparsely drilled wells.