Application of NMR in reservoir classification in Hailaer area;

Using conventional logging data is difficult to get correct reservoir classification in Hailaer basin,Daqing oilfield,which presents complex lithology and great difference pore structure.

The studied results showed:(1) the velocities of different lithology in Es3 of Niuzhuang sub-sag are different, the velocity of carbonic sandstone is the highest,sandstone is second and mudstone is the lowest; (2)the physical property of reservoir is bad for turbidite sand body characterized by very strong and very weak reflection amplitude,so t.

Mechanism and character of waler production in the gas reservoir are researched from the aspects of structure of reservoir,depositional environment physical property of reservoir and dynamic water production data of single well.

Influencing factors of low permeability reservoir property of Yanchang Formation in Changqing Oilfield;

Through the analyses of cast thin sections,scanning electron microscope(SEM),X-ray diffraction, vitrinite reflectance of more than 50 sandstone samples,the diagenesis types of the sandstone reservoir and their effects on reservoir property are studied.

If only analyze the data in the universal drill core and make statistic average, the method is definitely insufficient to represent the reservoir physical property, thus, particularly in this paper introduces th.

Combining with mud invasion test in lab and resistivity logging data under different environments,comprehensively analyzed is that effects of different factors on reservoir electricity,such as mud calking ability,salinity difference between mud and formation water,reservoir physical property,fluid property and steeping time.