15 coal roof and floor have good plugging performances,thus an .

Comprehensive evaluation procedure of sealing capability of mudstone caprocks in early exploration period in Chengzihe formation of Suibin Depression,Sanjiang Basin;

Gas reservoir in Dongpu depression in the area without halite is buried below 3000m,mainly below 3600m,which is greatly related with mudstone sealing capability changing with depth.

Comprehensive evaluation method for sealing ability of mudstone caprock to gas in each phase;

A method for analysing the palaeo-pressure sealing ability of poorly compacted shale barrier with the use of acoustic logging data;

Method for researching on mud-caprock sealing ability with the use of interval transit times;

Enhancement effect of bedding faults on the sealing capacity of original rocks;

Xiaolinke-Aogula fault spans Qijia-Gulong depression and the west slope,and its sealing ability and evolution history play very important roles in determining whether the oil and gas generated and expelled from Qijia-Gulong depression can migrate to and accumulate in the west slope.

The barrier sealing ability is relative jeven the high displacement pressure barrier only stops free hydrocarbon at a certain level,without obstruction to diffuse hydrocarbon and water solution hydrocarbon.