Abstract:

Gas resources assessment methods could be divided into two kinds: genetic method and statistical simutation method. The assessment results of these two methods obtained from the same geologic unit may differ differently, and usually the result of the genetic method is greater than that of the later. But combine these two methods together, use Pareto truncated distribution as numerical model, use iterative algorithm to obtain uniform results, the size,the number and the distribution of the gas fields and also gas resources enrichment which in a very important parameter for regional estimation analysis.

Key words: resource assessment, Pareto truncated distribution, resource, enrichment degree, resource extene, gasfield size, gasfield number