Application of fine logging interpretation in reserve calculation, Puguang Gas Field

The mineral composition and porosity interpreted by conventional logging are obviously different from core analysis,hence are not qualified for reserve prediction.In view of this,it is very important to carry out fine logging interpretation.A core hole in the Puguang Gas Field was chosen as the key to study the error between core and logging analysis.Mineral composition was calculated from PE curves and other logging data.Based on CNL and DEN as well as proper programming,porosity was calculated.New software to process the logging data from the Puguang Gas Field was made.The precision of logging interpretation was improved obviously,which backed up for the parameter research and reserve demonstration in the Puguang Gas Field.