Analyzing well log,well testing,and the core data,this paper discovered that the difference among pore types in the reservoirs is the main reason that the different logging response characteristics existed in the fluid with the same properties,and the misjudgement occurred mainly in the intercrystal p.

Based on the data of lithologic analysis and microscopic examination,the characteristics are studied,which include lithology,diagenesis type, pore type,clay mineral distribution and stage of diagenesis of clastic reservoirs in Lower Jurassic on the north margin of Lenghu area in Qaidam Basin.

It is concluded that these clastic reservoirs have low compositional and textural maturity, diagenesis is the early deep-burial later elevating type, pore types are constituted of residual intergranular pores, small amount of dissolution intergranular pores, ma.

These characteristics include petrofabric,diagenesis types,pore types,distribution rules of clay and diagenetic stage.

This paper,based on many more analytical data,describes the petrophysical properties,pore types and pore textures of deep reservoirs,and divides three types of reservoirs,such as low permeability,medium permeability,and tight reservoirs,of which the low permeability reservoirs are widely spread,and the medium permeability reservoirs are hug.

Based on the pore types of carbonate core in Carboniferous in East Sichuan, combining the logging curve characters of the various pore types, a method for discriminating the pore types of the carbonate reservoir is carried out, which is help to raise logging coincidence rate of quanlitatively discriminating gas and water layeres and quantitatively interpreting the accuracy.

On the basis of micro section identification data of the reservoirs, the author considers that the main factors affecting physical property parameters are rock type, grain size, porosity type and clay content.

Taking advantage of the characteristics of plane distribution of remaining recoverable reserves and the separate layer producing of the production-entry profile, and based on the heterogeneous seepage system of multiple type porosity groups for the conglomerate reservoir, the remaining oil distribution law, the enriched type and potential tapping are researched.