Study on the relationship between the high pressure of carbonate rock and accumulation of gas

The formation, evolution and distribution of high pressure of stratum liquid are closely related to the process of petroleum geology. The method of long compaction cannot be simply used to study the genesis of high pressure, due to the complexity of carbonate rock. Through the correlation of the difference of pressure-forming mechanisms between sandshale and carbonate rock in the eastern Sichuan, this paper discussed various pressure-forming mechanisms of carbonate rocks and pointed out that the hydrocarbon formation was a major factor responsible for the regional high pressure. The zonation of high pressure in the lateral and vertical directions in the area, and the relation between the gas accumulation and high pressure formation for various zones were presented. Finally, the relation between gas accumulation and high pressure in the eastern Sichuan was summarized.