摘要

The theory of oil accumulation threshold describes the formation and distribution of reservoirs quantitatively, which is better than other theories in predicting undiscovered resources in mature exploration area. In this article, Dongying sag was divided into eight petroleum accumulation system, and they were quantitatively estimated by the theory of oil accumulation threshold. The results shows that all of them have entered their thresholds of oil accumulation and resources. The total resources undiscovered is 17.03 × 108 t in Dongying sag. VIII and I petroleum accumulation systems have 4.41 × 108 t and 3.10 × 108 t undiscovered resources, respectively, which are much more than rest petroleum accumulation systems. VI and V petroleum accumulation systems have the least undiscovered resources 0.90 × 108 t and 0.22 × 108 t, respectively. So VIII and I petroleum accumulation systems are the potential areas to explore.

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