The prediction models of cumulative oil production, annual oil production, maximum annual oil production and occurrence time are built.

In order to directly predict the oviduct weight of Rana chensinensis by morphological character,the relationships among body weight,body length,forelimb length,posterior limb length,egg weight,age and oviduct weight of female Rana chensinensis were investigated by the method of one-way analysis and stepwise regression in the middle regions of Heilongjiang Province from April to May,2004.

Application of a neural network optimization combinatorial prediction model to oil-gas yield forecasting;

Application of the improved GM Model to oil production forecasting of Tarim Basin;

Analysis of oil production and regional composition change of China in recent twenty years;

The increase of oil production is very difficult.

The substance of this method is that,when oil and gas production starts declining,square root of annual oil production and accumulated oil production is a declining straight line in rectangular coordinate.

Formation permeability is decreased and well production is affected due to compaction effect caused by stress concentration after drilling.

It shows,as regards the sand production, the produdtion of oil well shoud be controlled to obtain secure well production.

To investigate the effect of initiation location of new fractures on well production, a reservoir model and a hydraulic fracture model are combined to model the fluid flow after re-fracturing.