The Petrophysical study of carbonate rocks is very
importance in Chegu 20 buried hill of Shengli Oilfield , because
commercial oil and gas flow has been discovered in carbonate
reservoir. Based on the characteristics of oil and gas reservoir ,
the paper introduces the thinking and methodology for making
successful petrophysical study-identifying reservoir rocks and non2
reservoir rocks by fuzzy mathematics using logging data on the
basis of core analysis and test information ; establishing the
explanting model of the effective porosity and the crack porosity ;
establishing the model of saturation by deep and sallow
lateroresistivity of logging data base on the different crack types ;
establishing partition standard of effective thickness on the basis
of these study data. The study can not only play an important role
in further researching this buried hill reservoir in the area , also
offer a kind of train of thought and method for this kind of
reservoir.
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