裂缝性油藏存在储集层发育孔、缝、洞多重介质,储层精细刻画难度大的问题。为准确描述裂缝性油藏储层发育的空间展布特征,利用测井、钻井资料和岩石物理测试数据建立关键井的嵌入式多尺度裂缝储层的地质和岩石物理模型,开展多重介质的连通传导率研究和嵌入式裂缝地质建模技术研究,并利用该模型对流花油田裂缝性储层进行数值模拟研究。研究结果表明:基于多尺度嵌入式裂缝模型的地质建模可以对构造、断层等大尺度裂缝和等效原理下的小尺度裂缝进行精细描述和数值模拟研究,单井动态指标拟合率达到90%以上;流花油田数值模拟研究表明,该油藏维持各井现有采液速度持续开发,大部分井不会发生严重水淹,风险较高的井主要位于工区的东北侧边缘断层附近。该研究可为同类油藏地质建模、数值模拟研究、开发方案的制订提供参考。
Fractured reservoirs are developed with pores, fractures and caves in reservoir bed, and it is difficult to accurately characterize the reservoir. In order to accurately describe the spatial distribution characteristics of fractured reservoirs, the geological and petrophysical models of embedded multi-scale fractured reservoirs of key wells were established according to logging and drilling data and petrophysical test data; a study was made on the multi-medium connectivity and conductivity and the geological modeling technology of embedded fractures, and the model was used to numerically simulate the fractured reservoirs in the lost oil field. The study results show that the geological modeling based on the multi-scale embedded fracture model can be used for detailed description and numerical simulation of large-scale fractures such as structure and fault, as well as small-scale fractures based on the equivalent principle, and the fitting rate of single-well dynamic indicators was more than 90%. The numerical simulation study of Liuhua Oilfield proves that the reservoir will maintain the current fluid recovery rate of each well for continuous development, most of the wells will not experience serious water flooding, and the wells with higher risk are mainly located near the fault on the northeast edge of the work area. This study provides a reference for geological modeling, numerical simulation and development for similar reservoirs.
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