Abstract:

In the practical operation of oil and gas exploration, the trap assessment is multisample,only limited data are obtained, plus the complexibility of the geological conditions, all these make the geological assessment of traps uncertain assessment model. On the basis of analyzing the characteristics of trap oilbearing, gray correlativ analysis is applied to work out the integrated assessment of structural trap oilbearing property, which can be used to integrativly assess oilbearing property of the trap, but the reiability of the assessment result can be given by degree of correlation. The basic idea, assessment method and practical application of gray correlative analysis method in trap assessment effectively solve the problem of trap optimization in the less explorative areas, shorten the cycle of exploration, and better effectiveness of interpretation and assessment is gained. Practice proves that the method requires small mount of data and simple calculation, it is a new break through of the application of structural trap assessment method.

Key words: trap, trap assessment, gray correlative analysis, degree of correlation, coefficient of correlation