Deposition environment, diagenesis and abnormal high pressure are the main factors to control petrophysical properties of deep reservoir in Madongdong area.

Under the control of overpressure, secondary pores distribution pattern of mainly development zone and secondarily decreasing and tight interval has been formed in Dongpu Depression.

Application of seismic while drilling technique in prediction of abnormally high pressure formation;

Controlling effect of gypsum and salt rocks on abnormally high pressure in Kuche Depression;

Discussion on distribution and origin of abnormally high pressure in Shahejie Formation, Zhanhua sag.;

Gas single-phase percolation characteristics of overpressured gas reservoir in Penglaizhen Formation,Xinchang gas field;

Overview of calculation methods of dynamic reserves in overpressure gas reservoir;

Distribution characteristics,dominant factors of overpressure formation and their effects on the reservoir formation are systematicaly studied in this paper.

Deliverability characteristics of gas pools with abnormal pressure——an example from well Heba-1 in the third member of the Feixianguan Formation of Hebachang block,the Sichuan Basin;

Forecasting method of production decline law of the ultra-low permeability oil reservoirs with abnormal pressure

The production index curves of all gas reservoirs, not only abnormal pressure ones, are curved downward.