Static mass of different types of reservoirs are analyzed and clarified from different angles in the area,which effectively control and divide position and types of main layers and scale and boundary of high-quality reservoirs.

Study of remaining oil distribution in S.P. non-main pay west of southern Saertu;

Reservoir physical property,percolating property and water drive performance were analysed,and oil layer was classified three kinds,main pay,hypo-main pay and non-main pay,then established classification criterion for oil layer.

Microcosmic factor analysis of yielding difference of major pay of gas field in the center of Ordos basin;

Through detailed observation and test analysis both in field and laboratory,thepetrological characteristics of the major pay penecontemporary dolostones in the Lower Paleozoic of Ordos region are systematically studied.

Because matrix cracking leads to re-distribution of stress of the laminates, the stress or strain of the primary load-bearing lamina (i.