Abstract:

The influence of geological factors should always be taken into account in establishing well log interpretation model,log data processing and reservoir evaluation.The log responce,the lithologic,petrophysic,rhythmic and electric characters and water contents of different types of reservoirs,different sedimental facies and different exploitation periods are different.According to these differences,the models of interpretation and calculation for porosity,permeability and oil saturation degree are establoshed and the interpretation accuracy thus inproved.Besides,the complexity of the fault blocks and the connection between the fault blocks should also be considered in log data processing during oil exploration and development.Based on the reservoir parameters obtained through data processing and the characters of fault block reservoirs,the methods of log reservoir quantitative and qualitalive evaluation are summerized by applying grey theory and fuzzy mathematical methods.The practical application results of the methods coincide well with well drilling.

Key words: fault block reservoir, interpretation model, log data processing, reservoir evaluationon