The Chang 6 reservoir of Yanchang Formation is the main producing pay of Ansai Hezhuang oil field, which has been entered a period of stabilized production.

Analysis of main control factors and prediction of favorable exploration belts of Chang2 reservoir in Youfangzhuang area,Ordos Basin;

Discovery of late-Paleozoic syndepositional faults in Hexi area;

The Hexi area is located at the tectonic convergence of the North China block and north Qilian Caledonian orogen and Alex block, and is characterized by multiple tectonism that resulted in very rich and complicated geological phenomena.

In view of the actuality of Hezhou prefecture water management and combining with current CCWAUMR needs, the authors probed into the mode of WREP synthetic management with WR right category management as kernel.

Speeding up industrialization is of great significance in invigorating the economy of Hezhou prefecture.

Liuzhuang and Huzhuangji oil province have complex geology and a variety of petrophysical properties.

According to the observation data of spectrosolar radiation by means of M-120 sunphotometer, optical properties of atmospheric aerosol in Helan mountain area have been analysed, and also the variation rule of aerosol optical depth and Angstrom turbidity parameter β , even wave exponent α under different weather conditions have been discussed.