大井距多层合采稠油油田剩余油分布研究

Study on residual oil distribution of heavy oil field with large well spacing and commingling production

剩余油分布特征是调整方案研究的基础,海上油田特点是测试资料少、井距大、多层合采、层间干扰严重,使得剩余油分布研究更加复杂。以海上某稠油油田为例,在精细地质研究的基础上,通过时移地震、油藏工程、油藏数值模拟等多种方法对剩余油在平面上、纵向上分布特征进行了深入研究,得出了海上大井距多层合采稠油油田剩余油在平面上、纵向上分布的规律,并且通过密闭取心井的岩心实验分析进一步验证对剩余油分布的认识。该方法可在同类型油田的剩余油分布研究中应用。

As offshore oil field is characterized by less test data, large well spacing,multi- layer producing and serious interference layer,the residual oil distribution,which is the basis of adjustment programs,becomes more complex.Take an example of heavy oil field in the sea,based on detailed geological studies and through time - lapse seismic,reservoir engineering,reservoir simulation and other methods,the in - depth study on residual oil distribution in vertical and horizontal direction was carried out.And therefore,the distribution law of heavy oil field with large well spacing and commingling production was obtained.Besides that,through sealed coring data analysis,the understanding on residual oil was further verified.The study shows that the method could also be applied in other oilfields with the same kind.