Method for obtaining key parameters for calculating residual oil amount in carrier beds after oil migration and accumulation in the Liaodong Bay Depression

Tian Lixin; Wu Li; Jiang Zhenxue; Zhou Jingjing; Yao Leilei

doi:10.11743/ogg20090403

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Method for obtaining key parameters for calculating residual oil amount in carrier beds after oil migration and accumulation in the Liaodong Bay Depression
Vol. 30, Issue 4, Pages: 405-411(2009)
Online First：25 August 2009，

Published：2009
DOI： 10.11743/ogg20090403
稿件说明：

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DOI：

Tian Lixin, Wu Li, Jiang Zhenxue, et al. Method for obtaining key parameters for calculating residual oil amount in carrier beds after oil migration and accumulation in the Liaodong Bay Depression[J]. 2009, 30(4): 405-411. DOI： 10.11743/ogg20090403.

摘要

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1.84×10

～2.59×10

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.

Abstract

The 1st and 2nd member of the Paleogene Shahejie Formation (E3s

and E3s

) in the Liaodong Bay depression were taken as examples.We performed geologic and statistical analyses on the residual hydrocarbons and physical properties of the reservoirs.Based on the characteristics of residual hydrocarbons inside and outside the hydrocarbon kitchen and in combination with the relationship between buoyance of oil column in carrier beds and capillary pressure of pores

we determined the height of residual oil column and calculated the amount of residual oil in carrier beds.The results show that the amount of residual oil range from 184 to 259 million tons in the carrier beds of E3s

and E3s

in the Liaodong Bay depression

amounting to 7.4%-10.4% of the total hydrocarbon expulsion.Residual hydrocarbon in reservoirs is the main loss of hydrocarbon in the process of secon-dary migration.The key parameters for calculating residual oil have great impact on the accuracy of prediction.