综合应用测井及地震资料建立复杂断块地质模型

GEOLOGICAL MODELING OF COMPLEX FAULT BLOCK RESERVOIR USING WELL LOGS AND SEISMIC DATA

针对滩海油田具有完钻井少,以地震资料为主的特点,采用井震结合的方法进行地质建模。复杂断块油藏具有许多内部断层,充分利用地震解释层位和断层成果建立合理的构造模型。采用"多步建模"的思路,选用序贯高斯同位协同模拟算法建立储层参数模型。以测井资料为硬数据,地震反演数据为软数据,先后建立自然伽玛模型、泥质含量模型和砂泥岩相模型,然后以砂泥岩相模型为约束,建立储层参数模型。经研究表明,综合使用地震解释成果和三维地震数据体,有助于建立准确、合理的构造模型;而采用"多步建模"的思路,利用序贯高斯同位协同模拟算法,并综合测井资料、地震资料建立储层参数模型,有助于从地质的角度对储层参数模拟进行约束,提高储层随机建模精度,保证储层参数模型的准确和可靠性。

The integration of well logs and seismic data is used to establish geological model in the beach oil field in which drilled well data is little and seismic become more important.There are many inner faults in complex fault block reservoir,so seismic interpreted horizons and faults should be used to establish reasonably structure models.Reservoir parameter model is established through using the algorithm of sequential Gaussian collocated co-simulation and the strategy of multi-step modeling.GR model,Vsh model and lithofacies model are established orderly by integrating hard data of well log with soft data of seismic inversion data.And then reservoir parameter model is established under constrains of lithofacies model.The research shows that structure model can be more reasonably established by using seismic interpretation outcome generally,and accuracy and dependability of reservoir parameter model is highly increased through using strategy of multi-step modeling and algorithm of sequential Gaussian collocated co-simulation to integrate well logs and seismic data.