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以辽东湾凹陷为例,针对古近系沙河街组一、二段储层,通过地质统计方法及储层残留烃量与储层物性等数据的地质分析,根据油气在烃源灶内和灶外的残留特征,结合运载层油柱浮力与孔隙毛管压力的关系,确定残留油柱高度,并对运载层残留油量进行了计算。结果表明,辽东湾凹陷沙河街组一、二段运载层残留油量在1.84×108～2.59×108t,约占排烃量的7.4%～10.4%。储层滞留烃是油气二次运移过程中的主要损耗方式,残留油量计算模型关键参数的获得对于预测结果的准确性具有重要的影响。
Taking the Liaodong Bay depression as an example, according to the geological analysis of the first and second reservoirs of the Shahejie Formation in the Paleogene, according to the geological analysis methods and the geological data of reservoir residual hydrocarbon and reservoir physical properties, And the residual characteristics of the residual oil column, the height of residual oil column was determined based on the relationship between the buoyancy of the oil column in the carrier layer and the pore capillary pressure. The residual oil content in the carrier layer was calculated. The results show that the residual oil content of the first and second sections of Shahejie Formation in Liaodong Bay depression is 1.84 × 108 ~ 2.59 × 108t, accounting for 7.4% ~ 10.4% of the hydrocarbon expulsion volume. Retention of hydrocarbons in reservoirs is the major mode of depletion during the secondary migration of oil and gas. The acquisition of key parameters in the residual oil content calculation model has an important impact on the accuracy of prediction results.