东营凹陷油气成藏体系的划分及定量评价

油气成藏体系作为油气评价单元的一种全新的研究思路, 与勘探目标结合更加紧密, 油气成藏门限从定量的角度阐述油气藏的形成及分布规律, 尤其对于高勘探程度的地区而言, 剩余资源的预测更为准确.在对东营凹陷油气成藏体系划分的基础上, 利用油气成藏门限理论对各成藏体系进行了定量评价.结果表明: 东营凹陷所划分的8个成藏体系都进入了成藏门限和资源门限, 凹陷总剩余资源量为17.03×108 t; 其中, 成藏体系Ⅷ、Ⅰ的剩余资源最大, 分别为4.41×108 t、3.10×108 t; 而成藏体系Ⅵ、Ⅴ最小, 分别为0.90×108 t、0.22×108 t; 其余成藏体系介于其间.可知, 成藏体系Ⅷ、Ⅰ为最有利勘探潜力区. 

Division and Quantitative Evaluation of Petroleum Accumulation System in Dongying Sag

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 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.