The field test indicates that in surge\|flow irrigation utilizing muddy water the formation and development of surface soil dense layer are the result of sedimentation and infiltration delay.

A compact layer on the surface, which is an anti-oxidation and anti-corrosion layer, formed spontaneously in MgO/ Si3N4 composite in the process of oxidation, and the thickness and density of the compact layer increased by adding Si or Al into the composite.

A new method to study stress sensitivity analysis of tight reservoir and its influence on oilfield development;

Stress sensitivity of tight reservoir and its influence on oilfield development;

Single factor diagenetic facies analysis of tight reservoir in western Sichuan foreland basin;

The authors think that the compact reservoir fracture in T3-J Formation in the north of the Chuxiong basin are mainly the tectonic fractures controlled by local structures based on the results of field fracture survey, description of bore core and identification of well logging.

This paper analyzes log responses of tight formations and tight gas reservoirs, correlates vertical formations in a same well and lateral formations in different wells and intra-formational response as well, uses graphic calibration method, analyzes the characteristics of logging curves of tight formations from different perspectives, and thus determines gas potential of tight formation.