Through analyzing the lateral sealing mechanism of fault and its influencing factors,this paper puts forward a method predicting the percentage of mudstone in filling material of faulted zone according to the lithology of faulted strata and fault throw.

The cementation quality experiments testing cement with different formation lithology were examined in the simulated high pressure deep well in sandstone or shale with different porosity and permeability.

Based on the downhole complicated conditions analysis of deep wells and ultra-deep wells in Kuche region,and comprehensively considering the influence factors,such as formation lithology and formation pressure,the probability density function of downhole complicated conditions was determined using the existing data by the probable theory method.

Based on the data obtained in the engineering geologic investigation,this paper makes analysis and evaluation on the landforms and formation lithology of Xiashijiazhuang Reservoir.

A conclusion is drawn that,topography,stratum lithology,geological structures and river erosion are the primary causes of landslides,but rainfall and human engineering activities are main factors to draw forth landslides.

Based on the Zoeppritz′s equation seismic multiwave AVA inversion of stratum lithology parameter has been discussed in this paper.

35 km2),and analyzed the relationships between site type groups and stratum lithology.