A区长7超低渗油藏测井二次解释研究

Study on Secondary Logging Interpretation of Chang 7 Ultra-low Permeability Reservoir in A Block

针对A区长7油藏储层物性差、非均质性强、隔夹层发育,采出程度低、剩余油丰富,但剩余油分布规律不明确、动用难度大等特点,充分利用录井、测井及取心化验分析资料,结合油井改造方式、试油数据及生产测试资料,在曲线标准化处理和储层四性关系研究的基础上,精确建立储层参数解释模型。在分区常规油水层识别图版的基础上,利用油层敏感参数构建和电阻率重构两种油层判识方法,重新识别油水层,提升识别精度,建立油水层识别标准,并进行储量复算,为储层认识及后期油田开发提供基础。

The Chang 7 reservoir in A block have the characteristics of poor physical property,strong heterogeneity,developed interlayer,low recovery degree,abundant remaining oil.But the distribution law of remaining oil is not clear,which is difficult to use.Based on the data of logging,logging and core-testing,well reconstruction method,oil test data and production test data,the reservoir parameter interpretation model is established accurately on the basis of curve standardization and reservoir four-relation study.On the basis of the conventional oil-water formation identification pattern,two oil formation identification methods,namely the construction of oil layer sensitive parameters and resistivity reconstruction,are used to re-identify oil and water layers,improve the identification accuracy,establish oil and water formation identification standards,and carry out reserve recalculation,which provides the foundation for reservoir understanding and later oilfield development.