永3复杂断块油藏多尺度地球物理资料流体预测研究

Study of fluid prediction based on multi-scale geophysical data of Yong3 complicated faulted reservoir

(1.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257061;2.北京金鹰旭日能源技术有限公司,北京100101;3.中国石油化工股份有限公司胜利油田分公司胜利采油厂，山东东营257000)

Geophysical Research Institute,Shengli Oilfield Branch Company,SINOPEC,Dongying 257022,China

利用永3复杂断块纵波和横波测井资料以及渗透率、孔隙度、岩相等静态参数,结合开发动态参数,对Gassmann模型进行标定,建立不同流体状态下的地球物理响应量版;将叠前地震反演流体预测数据投影到设定的油藏数值模拟网格上,利用标定的岩石物理量版对每个网格上的叠前地震反演属性进行含水饱和度计算;以流体反演得到的含水饱和度来约束历史拟合,最终得到剩余油分布的精细描述结果。研究表明,利用永3断块油藏模型及其对应的多尺度地球物理资料,可以定量地预测空间含水饱和度分布;叠前地震属性中的泊松比约束反演得到的含水饱和度场能较准确地描述油藏模型的含水饱和度;用泊松比反演得到的含水饱和度来约束油藏模型的历史拟合可以在空间上提供更多的信息,得到的流体分布结果与实际油藏信息更逼近。

Some data of Yong3 complicated faulted block,such as P-wave and S-wave logging data,static parameters(permeability,porosity and lithofacies etc)as well as dynamic production parameters,were used to calibrate Gassmann model,and establish geophysical response template in different fluid status.Then the pre-stack seismic inversion fluid prediction data was projected onto numerical reservoir simulation grid,and the water saturation at each grid can be estimated by using the calibrated template.Finally,the fluid spatial distribution can be mapped by integration of reservoir numerical simulation and seismic pre-stack inversion data.The result shows that Yong3 simulation model and the corresponding multi-cale geophysical data can be used to quantitatively predict the spatial distribution of water saturation.The water saturation obtained by Poisson’s ratio inversion was used to constrain the history matching of reservoir model,which can provide more spatial information,and the obtained fluid distribution is more consistent with the actual data.