ANALYSIS OF GEOCHEMICAL FIELD IN THE HYDROCARBON FORMATION OF THE TRANSITIONAL ZONE——A CASE STUDYOF GAS FROM THE BIO-THERMAL CATALYTIC TRANSITIONALZONE IN THE JIYANG DEPRESSION

In this paper,the Jiyang Depression is taken as an example to discuss the evolution of organic geochemical field,temperature field and stress field formed by the gas of the bio-thermal catalytic transitional zone in the area.It is considered that the mutual matching of each field is the key factor to form oil and gas accumulation.