济阳坳陷Y3地区基于地震资料的流体识别方法

^{Study on fluid identification method based on seismic data in Y3 area of Jiyang Depression}

(1.中国科学院广州地球化学研究所，广东广州 510000;2.中国石油化工股份有限公司胜利油田分公司物探研究院，山东东营 257022;3.中国石油大学(华东)，山东东营 257000)

Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510000,China

济阳坳陷Y3地区为复杂断块区，砂岩储层的厚度和物性变化快，油藏类型比较丰富。油田已经过多年开发，剩余油分布不明制约了后期开发水平的提高。为了弄清该地区的剩余油分布情况，在地震岩石物理分析的基础上，综合应用地震资料和测井资料提高地质框架模型的精度，利用叠前地震反演结果对储层的含流体性质进行描述。针对Y3地区小断层发育的特点，研究了多断块地震、地质、测井联合精细标定技术和井－震联合提高地质模型精度技术;针对油层的低密度、低泊松比特征，采用对流体敏感的泊松阻抗属性参数进行流体识别，提高了流体识别的精度。识别结果与采油动态情况吻合程度较好，新部署的钻探井获得了较高的产量。

Y3 area is a complex faulted block in Jiyang Depression.Many types of reservoirs exist in the area with fast changes of the thickness and physical properties of sandstone reservoir.After exploitation for years,the distribution of remaining oil is not clear,that restricts the improvement of development in later stage.Based on seismic petrophysical analysis,by integration of seismic data and logging data,the precision of geological frame model was improved,and the reservoir fluid properties was described by utilizing pre-stack seismic inversion.Aiming at the characteristics of small faults developing in the area,the research on multi-fault block fine calibration on seismic,geologic data and logging data as well as well-to-seismic integration for improving the accuracy of the geologic model were studied.Aiming at low-density and low Poisson’s ratio of the reservoir,the Poisson impedance attribute sensitive to fluid was adopted to identify fluid and improve fluid identification accuracy.The identification results match well with production performance,and newly drilled well gained high production.