Condensed section could be identified according to seismic data

well log

geochemical and fossil markers. Since its deposition environment was relatively stable

the species of orgomisms are various and organic matter is rich enough

the section could be taken as a key in stratigraphic correlation. It has been proved in practice that this kind of sections are usually important source rocks or regional cap rocks. According to the above mentioned markers

the Jiergalangtu Depression could be divided into five condensed sections with considerable oil generation potential.