(1) Based on the balanced section and the decompaction correction principle, the tectonic evolution of Cenozoic in the Bonan Region is analyzed from tectonic geometry and movement.

(2) The main problem of decompaction correction is how to found a reliable porosity depth function or density depth function which expresses the compaction process of clastic rock.

(3) For the sake of reliability of decompaction correction, this paper provides a me.

(4) A function found on the data of porosity depth or density depth from a given layer in one well or poly wells could be more reliable so that it can figure out a satisfying decompaction thickness.

(5) The cultivator shanks, instead of the plough, allow a decompaction, superficial and deep explosion of the soil.