油藏地球物理在垦71区块复杂岩性油藏的实践

摘要

垦71区块处于“三高”开发阶段,低序级断层及微幅度构造描述精度低,储层叠置关系及边界描述不准确,非均质性及优势流场描述不清,不能有效进行空间剩余油饱和度监测,造成了剩余油预测精度低,严重制约了该区块的油藏开发进程.为此,对多尺度地球物理资料进行了联合处理和储层联合反演,以得到的储层和流体信息为约束进行了油藏建模技术研究,建立了垦71区块高确定性的油藏地质模型,在此基础上对老区实施扩边和开发方案调整,取得了较好的油藏开发效果.%At present,Ken71 block is at the "three high" exploitation pe riod, which causes some problems, including low characterization precision of low-sequence faults and micro-relief structure, inaccurate characterization of reservoir overlaying relationship and boundary,unclear characterization of anisotropy and optimal flowfield. As a result,the spatial residual oil saturation cannot be effectively monitored, which led in low accuracy for the prediction of residual oil and seriously restricted the development of the area. Therefore, we carried out joint processing of multi-scale geophysical data and joint inversion of reservoirs. Then, the achieved reservoir and fluid information is used as the constraint for the research of reservoir modeling techniques. Consequently, the high-deterministic reservoir geologic model of Ken71 block was established, which was used for the extension of old area and the adjustment of development plan, and achieved good development results.